diff --git a/android/build.gradle b/android/build.gradle
index cd3c74b3e..8689794f1 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -57,9 +57,9 @@ dependencies {
   if (isDev(project)) {
     implementation fileTree(dir: "libs", include: ["*.jar"])
   } else {
-    api 'io.agora.rtc:iris-rtc:4.2.6-build.3'
-    api 'io.agora.rtc:full-sdk:4.2.6'
-    api 'io.agora.rtc:full-screen-sharing:4.2.6'
+    api 'io.agora.rtc:iris-rtc:4.3.0-dev.10'
+    api 'io.agora.rtc:agora-full-preview:4.3.0-dev.9'
+    api 'io.agora.rtc:full-screen-sharing-special:4.3.0-dev.9'
   }
 }
 
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/AgoraBase.h b/android/src/main/cpp/third_party/include/agora_rtc/AgoraBase.h
index 81580b034..d1c62ebdd 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/AgoraBase.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/AgoraBase.h
@@ -33,8 +33,10 @@
 
 #if defined(AGORARTC_EXPORT)
 #define AGORA_API extern "C" __declspec(dllexport)
+#define AGORA_CPP_API __declspec(dllexport)
 #else
 #define AGORA_API extern "C" __declspec(dllimport)
+#define AGORA_CPP_API __declspec(dllimport)
 #endif  // AGORARTC_EXPORT
 
 #define AGORA_CALL __cdecl
@@ -46,11 +48,13 @@
 #include <TargetConditionals.h>
 
 #define AGORA_API extern "C" __attribute__((visibility("default")))
+#define AGORA_CPP_API __attribute__((visibility("default")))
 #define AGORA_CALL
 
 #elif defined(__ANDROID__) || defined(__linux__)
 
 #define AGORA_API extern "C" __attribute__((visibility("default")))
+#define AGORA_CPP_API __attribute__((visibility("default")))
 #define AGORA_CALL
 
 #define __deprecated
@@ -58,6 +62,7 @@
 #else  // !_WIN32 && !__APPLE__ && !(__ANDROID__ || __linux__)
 
 #define AGORA_API extern "C"
+#define AGORA_CPP_API
 #define AGORA_CALL
 
 #define __deprecated
@@ -80,7 +85,7 @@
 #endif
 #endif
 
-#define INVALID_DISPLAY_ID 0xffff
+#define INVALID_DISPLAY_ID (-2)
 
 namespace agora {
 namespace util {
@@ -92,16 +97,16 @@ class AutoPtr {
   typedef T* pointer_type;
 
  public:
-  explicit AutoPtr(pointer_type p = NULL) : ptr_(p) {}
+  explicit AutoPtr(pointer_type p = OPTIONAL_NULLPTR) : ptr_(p) {}
 
   ~AutoPtr() {
     if (ptr_) {
       ptr_->release();
-      ptr_ = NULL;
+      ptr_ = OPTIONAL_NULLPTR;
     }
   }
 
-  operator bool() const { return (ptr_ != NULL); }
+  operator bool() const { return (ptr_ != OPTIONAL_NULLPTR); }
 
   value_type& operator*() const { return *get(); }
 
@@ -115,7 +120,7 @@ class AutoPtr {
     return ret;
   }
 
-  void reset(pointer_type ptr = NULL) {
+  void reset(pointer_type ptr = OPTIONAL_NULLPTR) {
     if (ptr != ptr_ && ptr_) {
       ptr_->release();
     }
@@ -125,12 +130,12 @@ class AutoPtr {
 
   template <class C1, class C2>
   bool queryInterface(C1* c, C2 iid) {
-    pointer_type p = NULL;
+    pointer_type p = OPTIONAL_NULLPTR;
     if (c && !c->queryInterface(iid, reinterpret_cast<void**>(&p))) {
       reset(p);
     }
 
-    return (p != NULL);
+    return (p != OPTIONAL_NULLPTR);
   }
 
  private:
@@ -153,7 +158,7 @@ class CopyableAutoPtr : public AutoPtr<T> {
     return *this;
   }
   pointer_type clone() const {
-    if (!this->get()) return NULL;
+    if (!this->get()) return OPTIONAL_NULLPTR;
     return this->get()->clone();
   }
 };
@@ -197,7 +202,7 @@ class AOutputIterator {
   typedef const value_type& const_reference;
   typedef value_type* pointer;
   typedef const value_type* const_pointer;
-  explicit AOutputIterator(IIterator* it = NULL) : p(it) {}
+  explicit AOutputIterator(IIterator* it = OPTIONAL_NULLPTR) : p(it) {}
   ~AOutputIterator() {
     if (p) p->release();
   }
@@ -215,7 +220,7 @@ class AOutputIterator {
   bool operator!=(const AOutputIterator& rhs) const { return !this->operator==(rhs); }
   reference operator*() { return *reinterpret_cast<pointer>(p->current()); }
   const_reference operator*() const { return *reinterpret_cast<const_pointer>(p->const_current()); }
-  bool valid() const { return p && p->current() != NULL; }
+  bool valid() const { return p && p->current() != OPTIONAL_NULLPTR; }
 };
 
 template <class T>
@@ -234,16 +239,16 @@ class AList {
   typedef const AOutputIterator<value_type> const_iterator;
 
  public:
-  AList() : container(NULL), owner(false) {}
+  AList() : container(OPTIONAL_NULLPTR), owner(false) {}
   AList(IContainer* c, bool take_ownership) : container(c), owner(take_ownership) {}
   ~AList() { reset(); }
-  void reset(IContainer* c = NULL, bool take_ownership = false) {
+  void reset(IContainer* c = OPTIONAL_NULLPTR, bool take_ownership = false) {
     if (owner && container) container->release();
     container = c;
     owner = take_ownership;
   }
-  iterator begin() { return container ? iterator(container->begin()) : iterator(NULL); }
-  iterator end() { return iterator(NULL); }
+  iterator begin() { return container ? iterator(container->begin()) : iterator(OPTIONAL_NULLPTR); }
+  iterator end() { return iterator(OPTIONAL_NULLPTR); }
   size_type size() const { return container ? container->size() : 0; }
   bool empty() const { return size() == 0; }
 };
@@ -731,10 +736,6 @@ enum ERROR_CODE_TYPE {
    * 1501: Video Device Module: The camera is not authorized.
    */
   ERR_VDM_CAMERA_NOT_AUTHORIZED = 1501,
-  /**
-   * 2007: Audio Device Module: An error occurs in starting the application loopback.
-   */
-  ERR_ADM_APPLICATION_LOOPBACK = 2007,
 };
 
 enum LICENSE_ERROR_TYPE {
@@ -857,9 +858,9 @@ enum INTERFACE_ID_TYPE {
   AGORA_IID_CLOUD_SPATIAL_AUDIO = 10,
   AGORA_IID_LOCAL_SPATIAL_AUDIO = 11,
   AGORA_IID_STATE_SYNC = 13,
-  AGORA_IID_METACHAT_SERVICE = 14,
+  AGORA_IID_META_SERVICE = 14,
   AGORA_IID_MUSIC_CONTENT_CENTER = 15,
-  AGORA_IID_H265_TRANSCODER = 16,
+  AGORA_IID_H265_TRANSCODER = 16,  
 };
 
 /**
@@ -1267,7 +1268,7 @@ struct SenderOptions {
 
   SenderOptions()
   : ccMode(CC_ENABLED),
-    codecType(VIDEO_CODEC_H264),
+    codecType(VIDEO_CODEC_H265),
     targetBitrate(6500) {}
 };
 
@@ -1542,12 +1543,23 @@ struct VideoSubscriptionOptions {
     VideoSubscriptionOptions() {}
 };
 
+
+/** The maximum length of the user account.
+ */
+enum MAX_USER_ACCOUNT_LENGTH_TYPE
+{
+  /** The maximum length of the user account is 256 bytes.
+   */
+  MAX_USER_ACCOUNT_LENGTH = 256
+};
+
 /**
  * The definition of the EncodedVideoFrameInfo struct, which contains the information of the external encoded video frame.
  */
 struct EncodedVideoFrameInfo {
   EncodedVideoFrameInfo()
-    : codecType(VIDEO_CODEC_H264),
+    : uid(0),
+      codecType(VIDEO_CODEC_H264),
       width(0),
       height(0),
       framesPerSecond(0),
@@ -1556,11 +1568,11 @@ struct EncodedVideoFrameInfo {
       trackId(0),
       captureTimeMs(0),
       decodeTimeMs(0),
-      uid(0),
       streamType(VIDEO_STREAM_HIGH) {}
 
   EncodedVideoFrameInfo(const EncodedVideoFrameInfo& rhs)
-    : codecType(rhs.codecType),
+    : uid(rhs.uid),
+      codecType(rhs.codecType),
       width(rhs.width),
       height(rhs.height),
       framesPerSecond(rhs.framesPerSecond),
@@ -1569,11 +1581,11 @@ struct EncodedVideoFrameInfo {
       trackId(rhs.trackId),
       captureTimeMs(rhs.captureTimeMs),
       decodeTimeMs(rhs.decodeTimeMs),
-      uid(rhs.uid),
       streamType(rhs.streamType) {}
 
   EncodedVideoFrameInfo& operator=(const EncodedVideoFrameInfo& rhs) {
     if (this == &rhs) return *this;
+    uid = rhs.uid;
     codecType = rhs.codecType;
     width = rhs.width;
     height = rhs.height;
@@ -1583,12 +1595,16 @@ struct EncodedVideoFrameInfo {
     trackId = rhs.trackId;
     captureTimeMs = rhs.captureTimeMs;
     decodeTimeMs = rhs.decodeTimeMs;
-    uid = rhs.uid;
     streamType = rhs.streamType;
     return *this;
   }
+
+  /**
+   * ID of the user that pushes the the external encoded video frame..
+   */
+  uid_t uid;
   /**
-   * The codec type of the local video stream. See #VIDEO_CODEC_TYPE. The default value is `VIDEO_CODEC_H264 (2)`.
+   * The codec type of the local video stream. See #VIDEO_CODEC_TYPE. The default value is `VIDEO_CODEC_H265 (3)`.
    */
   VIDEO_CODEC_TYPE codecType;
   /**
@@ -1626,16 +1642,13 @@ struct EncodedVideoFrameInfo {
    * The timestamp for decoding the video.
    */
   int64_t decodeTimeMs;
-  /**
-   * ID of the user that pushes the the external encoded video frame..
-   */
-  uid_t uid;
   /**
    * The stream type of video frame.
    */
   VIDEO_STREAM_TYPE streamType;
 
 };
+
 /**
 * Video compression preference.
 */
@@ -1750,6 +1763,8 @@ struct CodecCapInfo {
   int codecCapMask;
   /** The codec capability level, estimated based on the device hardware.*/
   CodecCapLevels codecLevels;
+
+  CodecCapInfo(): codecType(VIDEO_CODEC_NONE), codecCapMask(0) {}
 };
 
 /**
@@ -1863,7 +1878,7 @@ struct VideoEncoderConfiguration {
   AdvanceOptions advanceOptions;
 
   VideoEncoderConfiguration(const VideoDimensions& d, int f, int b, ORIENTATION_MODE m, VIDEO_MIRROR_MODE_TYPE mirror = VIDEO_MIRROR_MODE_DISABLED)
-    : codecType(VIDEO_CODEC_H264),
+    : codecType(VIDEO_CODEC_H265),
       dimensions(d),
       frameRate(f),
       bitrate(b),
@@ -1873,7 +1888,7 @@ struct VideoEncoderConfiguration {
       mirrorMode(mirror),
       advanceOptions(PREFER_AUTO, PREFER_LOW_LATENCY) {}
   VideoEncoderConfiguration(int width, int height, int f, int b, ORIENTATION_MODE m, VIDEO_MIRROR_MODE_TYPE mirror = VIDEO_MIRROR_MODE_DISABLED)
-    : codecType(VIDEO_CODEC_H264),
+    : codecType(VIDEO_CODEC_H265),
       dimensions(width, height),
       frameRate(f),
       bitrate(b),
@@ -1893,7 +1908,7 @@ struct VideoEncoderConfiguration {
       mirrorMode(config.mirrorMode),
       advanceOptions(config.advanceOptions) {}
   VideoEncoderConfiguration()
-    : codecType(VIDEO_CODEC_H264),
+    : codecType(VIDEO_CODEC_H265),
       dimensions(FRAME_WIDTH_960, FRAME_HEIGHT_540),
       frameRate(FRAME_RATE_FPS_15),
       bitrate(STANDARD_BITRATE),
@@ -2583,6 +2598,29 @@ enum VIDEO_APPLICATION_SCENARIO_TYPE {
   APPLICATION_SCENARIO_MEETING = 1,
 };
 
+/**
+ * The video QoE preference type.
+ */
+enum VIDEO_QOE_PREFERENCE_TYPE {
+  /**
+   * 1: Default QoE type, balance the delay, picture quality and fluency.
+   */
+  VIDEO_QOE_PREFERENCE_BALANCE = 1,
+  /**
+   * 2: lower the e2e delay.
+   */
+  VIDEO_QOE_PREFERENCE_DELAY_FIRST = 2,
+  /**
+   * 3: picture quality.
+   */
+  VIDEO_QOE_PREFERENCE_PICTURE_QUALITY_FIRST = 3,
+  /**
+   * 4: more fluency.
+   */
+  VIDEO_QOE_PREFERENCE_FLUENCY_FIRST = 4,
+
+};
+
 /**
  * The brightness level of the video image captured by the local camera.
  */
@@ -2627,50 +2665,50 @@ enum LOCAL_AUDIO_STREAM_STATE {
 /**
  * Local audio state error codes.
  */
-enum LOCAL_AUDIO_STREAM_ERROR {
+enum LOCAL_AUDIO_STREAM_REASON {
   /**
    * 0: The local audio is normal.
    */
-  LOCAL_AUDIO_STREAM_ERROR_OK = 0,
+  LOCAL_AUDIO_STREAM_REASON_OK = 0,
   /**
    * 1: No specified reason for the local audio failure. Remind your users to try to rejoin the channel.
    */
-  LOCAL_AUDIO_STREAM_ERROR_FAILURE = 1,
+  LOCAL_AUDIO_STREAM_REASON_FAILURE = 1,
   /**
    * 2: No permission to use the local audio device. Remind your users to grant permission.
    */
-  LOCAL_AUDIO_STREAM_ERROR_DEVICE_NO_PERMISSION = 2,
+  LOCAL_AUDIO_STREAM_REASON_DEVICE_NO_PERMISSION = 2,
   /**
    * 3: (Android and iOS only) The local audio capture device is used. Remind your users to check
    * whether another application occupies the microphone. Local audio capture automatically resume
    * after the microphone is idle for about five seconds. You can also try to rejoin the channel
    * after the microphone is idle.
    */
-  LOCAL_AUDIO_STREAM_ERROR_DEVICE_BUSY = 3,
+  LOCAL_AUDIO_STREAM_REASON_DEVICE_BUSY = 3,
   /**
    * 4: The local audio capture failed.
    */
-  LOCAL_AUDIO_STREAM_ERROR_RECORD_FAILURE = 4,
+  LOCAL_AUDIO_STREAM_REASON_RECORD_FAILURE = 4,
   /**
    * 5: The local audio encoding failed.
    */
-  LOCAL_AUDIO_STREAM_ERROR_ENCODE_FAILURE = 5,
+  LOCAL_AUDIO_STREAM_REASON_ENCODE_FAILURE = 5,
   /** 6: The SDK cannot find the local audio recording device.
    */
-  LOCAL_AUDIO_STREAM_ERROR_NO_RECORDING_DEVICE = 6,
+  LOCAL_AUDIO_STREAM_REASON_NO_RECORDING_DEVICE = 6,
   /** 7: The SDK cannot find the local audio playback device.
    */
-  LOCAL_AUDIO_STREAM_ERROR_NO_PLAYOUT_DEVICE = 7,
+  LOCAL_AUDIO_STREAM_REASON_NO_PLAYOUT_DEVICE = 7,
   /**
    * 8: The local audio capturing is interrupted by the system call.
    */
-  LOCAL_AUDIO_STREAM_ERROR_INTERRUPTED = 8,
+  LOCAL_AUDIO_STREAM_REASON_INTERRUPTED = 8,
   /** 9: An invalid audio capture device ID.
    */
-  LOCAL_AUDIO_STREAM_ERROR_RECORD_INVALID_ID = 9,
+  LOCAL_AUDIO_STREAM_REASON_RECORD_INVALID_ID = 9,
   /** 10: An invalid audio playback device ID.
    */
-  LOCAL_AUDIO_STREAM_ERROR_PLAYOUT_INVALID_ID = 10,
+  LOCAL_AUDIO_STREAM_REASON_PLAYOUT_INVALID_ID = 10,
 };
 
 /** Local video state types.
@@ -2698,73 +2736,73 @@ enum LOCAL_VIDEO_STREAM_STATE {
 /**
  * Local video state error codes.
  */
-enum LOCAL_VIDEO_STREAM_ERROR {
+enum LOCAL_VIDEO_STREAM_REASON {
   /**
    * 0: The local video is normal.
    */
-  LOCAL_VIDEO_STREAM_ERROR_OK = 0,
+  LOCAL_VIDEO_STREAM_REASON_OK = 0,
   /**
    * 1: No specified reason for the local video failure.
    */
-  LOCAL_VIDEO_STREAM_ERROR_FAILURE = 1,
+  LOCAL_VIDEO_STREAM_REASON_FAILURE = 1,
   /**
    * 2: No permission to use the local video capturing device. Remind the user to grant permission
    * and rejoin the channel.
    */
-  LOCAL_VIDEO_STREAM_ERROR_DEVICE_NO_PERMISSION = 2,
+  LOCAL_VIDEO_STREAM_REASON_DEVICE_NO_PERMISSION = 2,
   /**
    * 3: The local video capturing device is in use. Remind the user to check whether another
    * application occupies the camera.
    */
-  LOCAL_VIDEO_STREAM_ERROR_DEVICE_BUSY = 3,
+  LOCAL_VIDEO_STREAM_REASON_DEVICE_BUSY = 3,
   /**
    * 4: The local video capture fails. Remind the user to check whether the video capture device
    * is working properly or the camera is occupied by another application, and then to rejoin the
    * channel.
    */
-  LOCAL_VIDEO_STREAM_ERROR_CAPTURE_FAILURE = 4,
+  LOCAL_VIDEO_STREAM_REASON_CAPTURE_FAILURE = 4,
   /**
    * 5: The local video encoder is not supported.
    */
-  LOCAL_VIDEO_STREAM_ERROR_ENCODE_FAILURE = 5,
+  LOCAL_VIDEO_STREAM_REASON_CODEC_NOT_SUPPORT = 5,
   /**
    * 6: (iOS only) The app is in the background. Remind the user that video capture cannot be
    * performed normally when the app is in the background.
    */
-  LOCAL_VIDEO_STREAM_ERROR_CAPTURE_INBACKGROUND = 6,
+  LOCAL_VIDEO_STREAM_REASON_CAPTURE_INBACKGROUND = 6,
   /**
    * 7: (iOS only) The current application window is running in Slide Over, Split View, or Picture
    * in Picture mode, and another app is occupying the camera. Remind the user that the application
    * cannot capture video properly when the app is running in Slide Over, Split View, or Picture in
    * Picture mode and another app is occupying the camera.
    */
-  LOCAL_VIDEO_STREAM_ERROR_CAPTURE_MULTIPLE_FOREGROUND_APPS = 7,
+  LOCAL_VIDEO_STREAM_REASON_CAPTURE_MULTIPLE_FOREGROUND_APPS = 7,
   /**
    * 8: Fails to find a local video capture device. Remind the user to check whether the camera is
    * connected to the device properly or the camera is working properly, and then to rejoin the
    * channel.
    */
-  LOCAL_VIDEO_STREAM_ERROR_DEVICE_NOT_FOUND = 8,
+  LOCAL_VIDEO_STREAM_REASON_DEVICE_NOT_FOUND = 8,
   /**
    *  9: (macOS only) The video capture device currently in use is disconnected (such as being
    * unplugged).
    */
-  LOCAL_VIDEO_STREAM_ERROR_DEVICE_DISCONNECTED = 9,
+  LOCAL_VIDEO_STREAM_REASON_DEVICE_DISCONNECTED = 9,
   /**
    * 10: (macOS and Windows only) The SDK cannot find the video device in the video device list.
    * Check whether the ID of the video device is valid.
    */
-  LOCAL_VIDEO_STREAM_ERROR_DEVICE_INVALID_ID = 10,
+  LOCAL_VIDEO_STREAM_REASON_DEVICE_INVALID_ID = 10,
   /**
    * 101: The current video capture device is unavailable due to excessive system pressure.
    */
-  LOCAL_VIDEO_STREAM_ERROR_DEVICE_SYSTEM_PRESSURE = 101,
+  LOCAL_VIDEO_STREAM_REASON_DEVICE_SYSTEM_PRESSURE = 101,
   /**
    * 11: (macOS only) The shared window is minimized when you call `startScreenCaptureByWindowId`
    * to share a window. The SDK cannot share a minimized window. You can cancel the minimization
    * of this window at the application layer, for example by maximizing this window.
    */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_WINDOW_MINIMIZED = 11,
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_WINDOW_MINIMIZED = 11,
   /**
    * 12: (macOS and Windows only) The error code indicates that a window shared by the window ID
    * has been closed or a full-screen window shared by the window ID has exited full-screen mode.
@@ -2779,31 +2817,38 @@ enum LOCAL_VIDEO_STREAM_ERROR {
    * then shares the window of the web video or document. After the user exits full-screen mode,
    * the SDK reports this error code.
    */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_WINDOW_CLOSED = 12,
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_WINDOW_CLOSED = 12,
   /** 13: The local screen capture window is occluded. */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_WINDOW_OCCLUDED = 13,
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_WINDOW_OCCLUDED = 13,
   /** 20: The local screen capture window is not supported. */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_WINDOW_NOT_SUPPORTED = 20,
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_WINDOW_NOT_SUPPORTED = 20,
   /** 21: The screen capture fails. */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_FAILURE = 21,
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_FAILURE = 21,
   /** 22: No permision to capture screen. */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_NO_PERMISSION = 22,
-  /** 
-   * 23: The screen capture paused.
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_NO_PERMISSION = 22,
+  /**
+   * 24: (Windows Only) An unexpected error (possibly due to window block failure) occurs during the screen 
+   * sharing process, resulting in performance degradation. However, the screen sharing process itself is 
+   * functioning normally.
+   */
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_AUTO_FALLBACK = 24,
+  /** 25: (Windows only) The local screen capture window is currently hidden and not visible on the desktop. */
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_WINDOW_HIDDEN = 25,
+  /** 26: (Windows only) The local screen capture window is recovered from its hidden state. */
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_WINDOW_RECOVER_FROM_HIDDEN = 26,
+  /** 27:(Windows only) The window is recovered from miniminzed */
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_WINDOW_RECOVER_FROM_MINIMIZED = 27,
+    /** 
+   * 28: The screen capture paused.
    * 
    * Common scenarios for reporting this error code:
    * - When the desktop switch to the secure desktop such as UAC dialog or the Winlogon desktop on
    * Windows platform, the SDK reports this error code.
    */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_PAUSED = 23,
-  /** 24: The screen capture is resumed. */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_RESUMED = 24,
-  /** 25: (Windows only) The local screen capture window is currently hidden and not visible on the desktop. */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_WINDOW_HIDDEN = 25,
-  /** 26: (Windows only) The local screen capture window is recovered from its hidden state. */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_WINDOW_RECOVER_FROM_HIDDEN = 26,
-  /** 27:(Windows only) The window is recovered from miniminzed */
-  LOCAL_VIDEO_STREAM_ERROR_SCREEN_CAPTURE_WINDOW_RECOVER_FROM_MINIMIZED = 27,
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_PAUSED = 28,
+  /** 29: The screen capture is resumed. */
+  LOCAL_VIDEO_STREAM_REASON_SCREEN_CAPTURE_RESUMED = 29,
+
 };
 
 /**
@@ -2991,7 +3036,6 @@ enum REMOTE_USER_STATE {
    * The remote user has enabled the local video capturing.
    */
   USER_STATE_ENABLE_LOCAL_VIDEO = (1 << 8),
-
 };
 
 /**
@@ -3001,7 +3045,7 @@ enum REMOTE_USER_STATE {
 struct VideoTrackInfo {
   VideoTrackInfo()
   : isLocal(false), ownerUid(0), trackId(0), channelId(OPTIONAL_NULLPTR)
-  , streamType(VIDEO_STREAM_HIGH), codecType(VIDEO_CODEC_H264)
+  , streamType(VIDEO_STREAM_HIGH), codecType(VIDEO_CODEC_H265)
   , encodedFrameOnly(false), sourceType(VIDEO_SOURCE_CAMERA_PRIMARY)
   , observationPosition(agora::media::base::POSITION_POST_CAPTURER) {}
   /**
@@ -3014,7 +3058,6 @@ struct VideoTrackInfo {
    * ID of the user who publishes the video track.
    */
   uid_t ownerUid;
-
   /**
    * ID of the video track.
    */
@@ -3145,7 +3188,7 @@ class IPacketObserver {
      */
     unsigned int size;
 
-    Packet() : buffer(NULL), size(0) {}
+    Packet() : buffer(OPTIONAL_NULLPTR), size(0) {}
   };
   /**
    * Occurs when the SDK is ready to send the audio packet.
@@ -3278,6 +3321,18 @@ struct LocalAudioStats
    * The audio delay of the device, contains record and playout delay
    */
   int audioDeviceDelay;
+  /**
+   * The playout delay of the device
+   */
+  int audioPlayoutDelay;
+  /**
+   * The signal delay estimated from audio in-ear monitoring (ms).
+   */
+  int earMonitorDelay;
+  /**
+   * The signal delay estimated during the AEC process from nearin and farin (ms).
+   */
+  int aecEstimatedDelay;
 };
 
 
@@ -3316,74 +3371,74 @@ enum RTMP_STREAM_PUBLISH_STATE {
 /**
  * Error codes of the RTMP or RTMPS streaming.
  */
-enum RTMP_STREAM_PUBLISH_ERROR_TYPE {
+enum RTMP_STREAM_PUBLISH_REASON {
   /**
    * 0: The RTMP or RTMPS streaming publishes successfully.
    */
-  RTMP_STREAM_PUBLISH_ERROR_OK = 0,
+  RTMP_STREAM_PUBLISH_REASON_OK = 0,
   /**
    * 1: Invalid argument used. If, for example, you do not call the `setLiveTranscoding` method to configure the LiveTranscoding parameters before calling the addPublishStreamUrl method,
    * the SDK returns this error. Check whether you set the parameters in the `setLiveTranscoding` method properly.
    */
-  RTMP_STREAM_PUBLISH_ERROR_INVALID_ARGUMENT = 1,
+  RTMP_STREAM_PUBLISH_REASON_INVALID_ARGUMENT = 1,
   /**
    * 2: The RTMP or RTMPS streaming is encrypted and cannot be published.
    */
-  RTMP_STREAM_PUBLISH_ERROR_ENCRYPTED_STREAM_NOT_ALLOWED = 2,
+  RTMP_STREAM_PUBLISH_REASON_ENCRYPTED_STREAM_NOT_ALLOWED = 2,
   /**
    * 3: Timeout for the RTMP or RTMPS streaming. Call the `addPublishStreamUrl` method to publish the streaming again.
    */
-  RTMP_STREAM_PUBLISH_ERROR_CONNECTION_TIMEOUT = 3,
+  RTMP_STREAM_PUBLISH_REASON_CONNECTION_TIMEOUT = 3,
   /**
    * 4: An error occurs in Agora's streaming server. Call the `addPublishStreamUrl` method to publish the streaming again.
    */
-  RTMP_STREAM_PUBLISH_ERROR_INTERNAL_SERVER_ERROR = 4,
+  RTMP_STREAM_PUBLISH_REASON_INTERNAL_SERVER_ERROR = 4,
   /**
    * 5: An error occurs in the CDN server.
    */
-  RTMP_STREAM_PUBLISH_ERROR_RTMP_SERVER_ERROR = 5,
+  RTMP_STREAM_PUBLISH_REASON_RTMP_SERVER_ERROR = 5,
   /**
    * 6: The RTMP or RTMPS streaming publishes too frequently.
    */
-  RTMP_STREAM_PUBLISH_ERROR_TOO_OFTEN = 6,
+  RTMP_STREAM_PUBLISH_REASON_TOO_OFTEN = 6,
   /**
    * 7: The host publishes more than 10 URLs. Delete the unnecessary URLs before adding new ones.
    */
-  RTMP_STREAM_PUBLISH_ERROR_REACH_LIMIT = 7,
+  RTMP_STREAM_PUBLISH_REASON_REACH_LIMIT = 7,
   /**
    * 8: The host manipulates other hosts' URLs. Check your app logic.
    */
-  RTMP_STREAM_PUBLISH_ERROR_NOT_AUTHORIZED = 8,
+  RTMP_STREAM_PUBLISH_REASON_NOT_AUTHORIZED = 8,
   /**
    * 9: Agora's server fails to find the RTMP or RTMPS streaming.
    */
-  RTMP_STREAM_PUBLISH_ERROR_STREAM_NOT_FOUND = 9,
+  RTMP_STREAM_PUBLISH_REASON_STREAM_NOT_FOUND = 9,
   /**
    * 10: The format of the RTMP or RTMPS streaming URL is not supported. Check whether the URL format is correct.
    */
-  RTMP_STREAM_PUBLISH_ERROR_FORMAT_NOT_SUPPORTED = 10,
+  RTMP_STREAM_PUBLISH_REASON_FORMAT_NOT_SUPPORTED = 10,
   /**
    * 11: The user role is not host, so the user cannot use the CDN live streaming function. Check your application code logic.
    */
-  RTMP_STREAM_PUBLISH_ERROR_NOT_BROADCASTER = 11,  // Note: match to ERR_PUBLISH_STREAM_NOT_BROADCASTER in AgoraBase.h
+  RTMP_STREAM_PUBLISH_REASON_NOT_BROADCASTER = 11,  // Note: match to ERR_PUBLISH_STREAM_NOT_BROADCASTER in AgoraBase.h
   /**
    * 13: The `updateRtmpTranscoding` or `setLiveTranscoding` method is called to update the transcoding configuration in a scenario where there is streaming without transcoding. Check your application code logic.
    */
-  RTMP_STREAM_PUBLISH_ERROR_TRANSCODING_NO_MIX_STREAM = 13,  // Note: match to ERR_PUBLISH_STREAM_TRANSCODING_NO_MIX_STREAM in AgoraBase.h
+  RTMP_STREAM_PUBLISH_REASON_TRANSCODING_NO_MIX_STREAM = 13,  // Note: match to ERR_PUBLISH_STREAM_TRANSCODING_NO_MIX_STREAM in AgoraBase.h
   /**
    * 14: Errors occurred in the host's network.
    */
-  RTMP_STREAM_PUBLISH_ERROR_NET_DOWN = 14,  // Note: match to ERR_NET_DOWN in AgoraBase.h
+  RTMP_STREAM_PUBLISH_REASON_NET_DOWN = 14,  // Note: match to ERR_NET_DOWN in AgoraBase.h
   /**
    * 15: Your App ID does not have permission to use the CDN live streaming function.
    */
-  RTMP_STREAM_PUBLISH_ERROR_INVALID_APPID = 15,  // Note: match to ERR_PUBLISH_STREAM_APPID_INVALID in AgoraBase.h
+  RTMP_STREAM_PUBLISH_REASON_INVALID_APPID = 15,  // Note: match to ERR_PUBLISH_STREAM_APPID_INVALID in AgoraBase.h
   /** invalid privilege. */
-  RTMP_STREAM_PUBLISH_ERROR_INVALID_PRIVILEGE = 16,
+  RTMP_STREAM_PUBLISH_REASON_INVALID_PRIVILEGE = 16,
   /**
    * 100: The streaming has been stopped normally. After you call `removePublishStreamUrl` to stop streaming, the SDK returns this value.
    */
-  RTMP_STREAM_UNPUBLISH_ERROR_OK = 100,
+  RTMP_STREAM_UNPUBLISH_REASON_OK = 100,
 };
 
 /** Events during the RTMP or RTMPS streaming. */
@@ -3445,7 +3500,7 @@ typedef struct RtcImage {
    */
   double alpha;
 
-  RtcImage() : url(NULL), x(0), y(0), width(0), height(0), zOrder(0), alpha(1.0) {}
+  RtcImage() : url(OPTIONAL_NULLPTR), x(0), y(0), width(0), height(0), zOrder(0), alpha(1.0) {}
 } RtcImage;
 /**
  * The configuration for advanced features of the RTMP or RTMPS streaming with transcoding.
@@ -3453,7 +3508,7 @@ typedef struct RtcImage {
  * If you want to enable the advanced features of streaming with transcoding, contact support@agora.io.
  */
 struct LiveStreamAdvancedFeature {
-  LiveStreamAdvancedFeature() : featureName(NULL), opened(false) {}
+  LiveStreamAdvancedFeature() : featureName(OPTIONAL_NULLPTR), opened(false) {}
   LiveStreamAdvancedFeature(const char* feat_name, bool open) : featureName(feat_name), opened(open) {}
   /** The advanced feature for high-quality video with a lower bitrate. */
   // static const char* LBHQ = "lbhq";
@@ -3573,6 +3628,7 @@ struct TranscodingUser {
    * @note If the value is not `0`, a special player is required.
    */
   int audioChannel;
+
   TranscodingUser()
       : uid(0),
         x(0),
@@ -3692,7 +3748,31 @@ struct LiveTranscoding {
 
   /** The number of enabled advanced features. The default value is 0. */
   unsigned int advancedFeatureCount;
-  LiveTranscoding() : width(360), height(640), videoBitrate(400), videoFramerate(15), lowLatency(false), videoGop(30), videoCodecProfile(VIDEO_CODEC_PROFILE_HIGH), backgroundColor(0x000000), videoCodecType(VIDEO_CODEC_H264_FOR_STREAM), userCount(0), transcodingUsers(NULL), transcodingExtraInfo(NULL), metadata(NULL), watermark(NULL), watermarkCount(0), backgroundImage(NULL), backgroundImageCount(0), audioSampleRate(AUDIO_SAMPLE_RATE_48000), audioBitrate(48), audioChannels(1), audioCodecProfile(AUDIO_CODEC_PROFILE_LC_AAC), advancedFeatures(NULL), advancedFeatureCount(0) {}
+
+  LiveTranscoding()
+      : width(360),
+        height(640),
+        videoBitrate(400),
+        videoFramerate(15),
+        lowLatency(false),
+        videoGop(30),
+        videoCodecProfile(VIDEO_CODEC_PROFILE_HIGH),
+        backgroundColor(0x000000),
+        videoCodecType(VIDEO_CODEC_H264_FOR_STREAM),
+        userCount(0), 
+        transcodingUsers(OPTIONAL_NULLPTR),
+        transcodingExtraInfo(OPTIONAL_NULLPTR),
+        metadata(OPTIONAL_NULLPTR),
+        watermark(OPTIONAL_NULLPTR),
+        watermarkCount(0),
+        backgroundImage(OPTIONAL_NULLPTR),
+        backgroundImageCount(0),
+        audioSampleRate(AUDIO_SAMPLE_RATE_48000),
+        audioBitrate(48),
+        audioChannels(1),
+        audioCodecProfile(AUDIO_CODEC_PROFILE_LC_AAC),
+        advancedFeatures(OPTIONAL_NULLPTR),
+        advancedFeatureCount(0) {}
 };
 
 /**
@@ -3754,7 +3834,7 @@ struct TranscodingVideoStream {
   TranscodingVideoStream()
     : sourceType(VIDEO_SOURCE_CAMERA_PRIMARY),
       remoteUserUid(0),
-      imageUrl(NULL),
+      imageUrl(OPTIONAL_NULLPTR),
       x(0),
       y(0),
       width(0),
@@ -3764,7 +3844,6 @@ struct TranscodingVideoStream {
       mirror(false) {}
 };
 
-
 /**
  * The configuration of the video mixing on the local client.
  */
@@ -3788,11 +3867,7 @@ struct LocalTranscoderConfiguration {
    */
   bool syncWithPrimaryCamera;
 
-  LocalTranscoderConfiguration()
-    : streamCount(0),
-      videoInputStreams(NULL),
-      videoOutputConfiguration(),
-      syncWithPrimaryCamera(true) {}
+  LocalTranscoderConfiguration() : streamCount(0), videoInputStreams(OPTIONAL_NULLPTR), videoOutputConfiguration(), syncWithPrimaryCamera(true) {}
 };
 
 enum VIDEO_TRANSCODER_ERROR {
@@ -4014,10 +4089,18 @@ enum CONNECTION_CHANGED_REASON_TYPE
    * 21: The connection is failed due to license validation failure.
    */
   CONNECTION_CHANGED_LICENSE_VALIDATION_FAILURE = 21,
-  /**
+  /*
    * 22: The connection is failed due to certification verify failure.
    */
   CONNECTION_CHANGED_CERTIFICATION_VERYFY_FAILURE = 22,
+  /**
+   * 23: The connection is failed due to the lack of granting permission to the stream channel.
+   */
+  CONNECTION_CHANGED_STREAM_CHANNEL_NOT_AVAILABLE = 23,
+  /**
+   * 24: The connection is failed due to join channel with an inconsistent appid.
+   */
+  CONNECTION_CHANGED_INCONSISTENT_APPID = 24,
 };
 
 /**
@@ -4156,14 +4239,19 @@ enum VIDEO_VIEW_SETUP_MODE {
  * Attributes of video canvas object.
  */
 struct VideoCanvas {
-  /**
-   * Video display window.
-   */
-  view_t view;
   /**
    * The user id of local video.
    */
   uid_t uid;
+
+  /**
+  * The uid of video stream composing the video stream from transcoder which will be drawn on this video canvas. 
+  */
+  uid_t subviewUid;
+  /**
+   * Video display window.
+   */
+  view_t view;
   /**
    * A RGBA value indicates background color of the render view. Defaults to 0x00000000.
    */
@@ -4205,28 +4293,37 @@ struct VideoCanvas {
    * The default value is empty(that is, if it has zero width or height), which means no cropping.
    */
   Rectangle cropArea;
-
   /**
-  * Whether to apply alpha mask to the video frame if exsit:
-  * true: Apply alpha mask to video frame.
-  * false: (Default) Do not apply alpha mask to video frame.
-  */
+   * Whether to apply alpha mask to the video frame if exsit:
+   * true: Apply alpha mask to video frame.
+   * false: (Default) Do not apply alpha mask to video frame.
+   */
   bool enableAlphaMask;
-  
+  /**
+   * The video frame position in pipeline. See \ref VIDEO_MODULE_POSITION "VIDEO_MODULE_POSITION".
+   * The default value is POSITION_POST_CAPTURER.
+   */
+  media::base::VIDEO_MODULE_POSITION position;
+
   VideoCanvas()
-    : view(NULL), uid(0), backgroundColor(0x00000000), renderMode(media::base::RENDER_MODE_HIDDEN), mirrorMode(VIDEO_MIRROR_MODE_AUTO),
+    : uid(0), subviewUid(0), view(NULL), backgroundColor(0x00000000), renderMode(media::base::RENDER_MODE_HIDDEN), mirrorMode(VIDEO_MIRROR_MODE_AUTO),
       setupMode(VIDEO_VIEW_SETUP_REPLACE), sourceType(VIDEO_SOURCE_CAMERA_PRIMARY), mediaPlayerId(-ERR_NOT_READY),
-      cropArea(0, 0, 0, 0), enableAlphaMask(false) {}
+      cropArea(0, 0, 0, 0), enableAlphaMask(false), position(media::base::POSITION_POST_CAPTURER) {}
+
+  VideoCanvas(view_t v, media::base::RENDER_MODE_TYPE m, VIDEO_MIRROR_MODE_TYPE mt)
+    : uid(0), subviewUid(0), view(v), backgroundColor(0x00000000), renderMode(m), mirrorMode(mt), setupMode(VIDEO_VIEW_SETUP_REPLACE),
+      sourceType(VIDEO_SOURCE_CAMERA_PRIMARY), mediaPlayerId(-ERR_NOT_READY),
+      cropArea(0, 0, 0, 0), enableAlphaMask(false), position(media::base::POSITION_POST_CAPTURER) {}
 
   VideoCanvas(view_t v, media::base::RENDER_MODE_TYPE m, VIDEO_MIRROR_MODE_TYPE mt, uid_t u)
-    : view(v), uid(u), backgroundColor(0x00000000), renderMode(m), mirrorMode(mt), setupMode(VIDEO_VIEW_SETUP_REPLACE),
+    : uid(u), subviewUid(0), view(v), backgroundColor(0x00000000), renderMode(m), mirrorMode(mt), setupMode(VIDEO_VIEW_SETUP_REPLACE),
       sourceType(VIDEO_SOURCE_CAMERA_PRIMARY), mediaPlayerId(-ERR_NOT_READY),
-      cropArea(0, 0, 0, 0), enableAlphaMask(false) {}
+      cropArea(0, 0, 0, 0), enableAlphaMask(false), position(media::base::POSITION_POST_CAPTURER) {}
 
-  VideoCanvas(view_t v, media::base::RENDER_MODE_TYPE m, VIDEO_MIRROR_MODE_TYPE mt, user_id_t)
-    : view(v), uid(0), backgroundColor(0x00000000), renderMode(m), mirrorMode(mt), setupMode(VIDEO_VIEW_SETUP_REPLACE),
+  VideoCanvas(view_t v, media::base::RENDER_MODE_TYPE m, VIDEO_MIRROR_MODE_TYPE mt, uid_t u, uid_t subu)
+    : uid(u), subviewUid(subu), view(v), backgroundColor(0x00000000), renderMode(m), mirrorMode(mt), setupMode(VIDEO_VIEW_SETUP_REPLACE),
       sourceType(VIDEO_SOURCE_CAMERA_PRIMARY), mediaPlayerId(-ERR_NOT_READY),
-      cropArea(0, 0, 0, 0), enableAlphaMask(false) {}
+      cropArea(0, 0, 0, 0), enableAlphaMask(false), position(media::base::POSITION_POST_CAPTURER) {}
 };
 
 /** Image enhancement options.
@@ -4438,7 +4535,7 @@ struct VirtualBackgroundSource {
    */
   BACKGROUND_BLUR_DEGREE blur_degree;
 
-  VirtualBackgroundSource() : background_source_type(BACKGROUND_COLOR), color(0xffffff), source(NULL),  blur_degree(BLUR_DEGREE_HIGH) {}
+  VirtualBackgroundSource() : background_source_type(BACKGROUND_COLOR), color(0xffffff), source(OPTIONAL_NULLPTR),  blur_degree(BLUR_DEGREE_HIGH) {}
 };
 
 struct SegmentationProperty {
@@ -4836,22 +4933,22 @@ struct ScreenCaptureParameters {
    */
   int excludeWindowCount;
 
-    /** The width (px) of the border. Defaults to 0, and the value range is [0,50].
-     *
-     */
-    int highLightWidth;
-    /** The color of the border in RGBA format. The default value is 0xFF8CBF26.
-     *
-     */
-    unsigned int highLightColor;
-    /** Whether to place a border around the shared window or screen:
-     * - true: Place a border.
-     * - false: (Default) Do not place a border.
-     *
-     * @note When you share a part of a window or screen, the SDK places a border around the entire window or screen if you set `enableHighLight` as true.
-     *
-     */
-    bool enableHighLight;
+  /** The width (px) of the border. Defaults to 0, and the value range is [0,50].
+    *
+    */
+  int highLightWidth;
+  /** The color of the border in RGBA format. The default value is 0xFF8CBF26.
+    *
+    */
+  unsigned int highLightColor;
+  /** Whether to place a border around the shared window or screen:
+    * - true: Place a border.
+    * - false: (Default) Do not place a border.
+    *
+    * @note When you share a part of a window or screen, the SDK places a border around the entire window or screen if you set `enableHighLight` as true.
+    *
+    */
+  bool enableHighLight;
 
   ScreenCaptureParameters()
     : dimensions(1920, 1080), frameRate(5), bitrate(STANDARD_BITRATE), captureMouseCursor(true), windowFocus(false), excludeWindowList(OPTIONAL_NULLPTR), excludeWindowCount(0), highLightWidth(0), highLightColor(0), enableHighLight(false)  {}
@@ -4968,7 +5065,7 @@ struct AudioRecordingConfiguration {
   int recordingChannel;
 
   AudioRecordingConfiguration()
-    : filePath(NULL),
+    : filePath(OPTIONAL_NULLPTR),
       encode(false),
       sampleRate(32000),
       fileRecordingType(AUDIO_FILE_RECORDING_MIXED),
@@ -5172,59 +5269,6 @@ enum CHANNEL_MEDIA_RELAY_ERROR {
   RELAY_ERROR_DEST_TOKEN_EXPIRED = 11,
 };
 
-/**
- * The event code of channel media relay.
- */
-enum CHANNEL_MEDIA_RELAY_EVENT {
-  /** 0: The user disconnects from the server due to poor network connections.
-   */
-  RELAY_EVENT_NETWORK_DISCONNECTED = 0,
-  /** 1: The user is connected to the server.
-   */
-  RELAY_EVENT_NETWORK_CONNECTED = 1,
-  /** 2: The user joins the source channel.
-   */
-  RELAY_EVENT_PACKET_JOINED_SRC_CHANNEL = 2,
-  /** 3: The user joins the destination channel.
-   */
-  RELAY_EVENT_PACKET_JOINED_DEST_CHANNEL = 3,
-  /** 4: The SDK starts relaying the media stream to the destination channel.
-   */
-  RELAY_EVENT_PACKET_SENT_TO_DEST_CHANNEL = 4,
-  /** 5: The server receives the video stream from the source channel.
-   */
-  RELAY_EVENT_PACKET_RECEIVED_VIDEO_FROM_SRC = 5,
-  /** 6: The server receives the audio stream from the source channel.
-   */
-  RELAY_EVENT_PACKET_RECEIVED_AUDIO_FROM_SRC = 6,
-  /** 7: The destination channel is updated.
-   */
-  RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL = 7,
-  /** 8: The destination channel update fails due to internal reasons.
-   */
-  RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL_REFUSED = 8,
-  /** 9: The destination channel does not change, which means that the destination channel fails to be updated.
-   */
-  RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL_NOT_CHANGE = 9,
-  /** 10: The destination channel name is NULL.
-   */
-  RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL_IS_NULL = 10,
-  /** 11: The video profile is sent to the server.
-   */
-  RELAY_EVENT_VIDEO_PROFILE_UPDATE = 11,
-  /** 12: The SDK successfully pauses relaying the media stream to destination channels.
-   */
-  RELAY_EVENT_PAUSE_SEND_PACKET_TO_DEST_CHANNEL_SUCCESS = 12,
-  /** 13: The SDK fails to pause relaying the media stream to destination channels.
-   */
-  RELAY_EVENT_PAUSE_SEND_PACKET_TO_DEST_CHANNEL_FAILED = 13,
-  /** 14: The SDK successfully resumes relaying the media stream to destination channels.
-   */
-  RELAY_EVENT_RESUME_SEND_PACKET_TO_DEST_CHANNEL_SUCCESS = 14,
-  /** 15: The SDK fails to resume relaying the media stream to destination channels.
-   */
-  RELAY_EVENT_RESUME_SEND_PACKET_TO_DEST_CHANNEL_FAILED = 15,
-};
 /**
  * The state code of the channel media relay.
  */
@@ -5247,17 +5291,20 @@ enum CHANNEL_MEDIA_RELAY_STATE {
 /** The definition of ChannelMediaInfo.
  */
 struct ChannelMediaInfo {
-    /** The channel name. The default value is NULL, which means that the SDK
-     * applies the current channel name.
+  /** The user ID.
      */
+  uid_t uid;
+  /** The channel name. The default value is NULL, which means that the SDK
+    * applies the current channel name.
+    */
   const char* channelName;
-    /** The token that enables the user to join the channel. The default value
-     * is NULL, which means that the SDK applies the current token.
-     */
+  /** The token that enables the user to join the channel. The default value
+    * is NULL, which means that the SDK applies the current token.
+    */
   const char* token;
-    /** The user ID.
-     */
-  uid_t uid;
+
+  ChannelMediaInfo() : uid(0), channelName(NULL), token(NULL) {}
+  ChannelMediaInfo(const char* c, const char* t, uid_t u) : uid(u), channelName(c), token(t) {}
 };
 
 /** The definition of ChannelMediaRelayConfiguration.
@@ -5275,7 +5322,7 @@ struct ChannelMediaRelayConfiguration {
    *   - If you have enabled the App Certificate, you must use the token generated with the `channelName` and `uid`, and
    * the `uid` must be set as 0.
    */
-  ChannelMediaInfo *srcInfo;
+  ChannelMediaInfo* srcInfo;
   /** The information of the destination channel `ChannelMediaInfo`. It contains the following members:
    * - `channelName`: The name of the destination channel.
    * - `uid`: The unique ID to identify the relay stream in the destination channel. The value
@@ -5290,18 +5337,14 @@ struct ChannelMediaRelayConfiguration {
    * If you have enabled the App Certificate, you must use the token generated with the `channelName`
    * and `uid`.
    */
-  ChannelMediaInfo *destInfos;
+  ChannelMediaInfo* destInfos;
   /** The number of destination channels. The default value is 0, and the value range is from 0 to
    * 6. Ensure that the value of this parameter corresponds to the number of `ChannelMediaInfo`
    * structs you define in `destInfo`.
    */
   int destCount;
 
-  ChannelMediaRelayConfiguration()
-    : srcInfo(NULL),
-      destInfos(NULL),
-      destCount(0)
-  {}
+  ChannelMediaRelayConfiguration() : srcInfo(OPTIONAL_NULLPTR), destInfos(OPTIONAL_NULLPTR), destCount(0) {}
 };
 
 /**
@@ -5320,15 +5363,12 @@ struct UplinkNetworkInfo {
   }
 };
 
-/**
- * The collections of downlink network info.
- */
 struct DownlinkNetworkInfo {
   struct PeerDownlinkInfo {
     /**
      * The ID of the user who owns the remote video stream.
      */
-    const char* uid;
+    const char* userId;
     /**
      * The remote video stream type: #VIDEO_STREAM_TYPE.
      */
@@ -5343,28 +5383,41 @@ struct DownlinkNetworkInfo {
     int expected_bitrate_bps;
 
     PeerDownlinkInfo()
-        : uid(OPTIONAL_NULLPTR),
+        : userId(OPTIONAL_NULLPTR),
           stream_type(VIDEO_STREAM_HIGH),
           current_downscale_level(REMOTE_VIDEO_DOWNSCALE_LEVEL_NONE),
           expected_bitrate_bps(-1) {}
 
+    PeerDownlinkInfo(const PeerDownlinkInfo& rhs)
+         : stream_type(rhs.stream_type),
+          current_downscale_level(rhs.current_downscale_level),
+          expected_bitrate_bps(rhs.expected_bitrate_bps) {
+      if (rhs.userId != OPTIONAL_NULLPTR) {
+        const int len = std::strlen(rhs.userId);
+        char* buf = new char[len + 1];
+        std::memcpy(buf, rhs.userId, len);
+        buf[len] = '\0';
+        userId = buf;
+      }
+    }
+
     PeerDownlinkInfo& operator=(const PeerDownlinkInfo& rhs) {
       if (this == &rhs) return *this;
-      uid = OPTIONAL_NULLPTR;
+      userId = OPTIONAL_NULLPTR;
       stream_type = rhs.stream_type;
       current_downscale_level = rhs.current_downscale_level;
       expected_bitrate_bps = rhs.expected_bitrate_bps;
-      if (rhs.uid != OPTIONAL_NULLPTR) {
-        char* temp = new char[strlen(rhs.uid) + 1];
-        strcpy(temp, rhs.uid);
-        uid = temp;
+      if (rhs.userId != OPTIONAL_NULLPTR) {
+        const int len = std::strlen(rhs.userId);
+        char* buf = new char[len + 1];
+        std::memcpy(buf, rhs.userId, len);
+        buf[len] = '\0';
+        userId = buf;
       }
       return *this;
     }
 
-    ~PeerDownlinkInfo() {
-      if (uid) { delete [] uid; }
-    }
+    ~PeerDownlinkInfo() { delete[] userId; }
   };
 
   /**
@@ -5422,9 +5475,7 @@ struct DownlinkNetworkInfo {
     return *this;
   }
 
-  ~DownlinkNetworkInfo() {
-    if (peer_downlink_info) delete [] peer_downlink_info;
-  }
+  ~DownlinkNetworkInfo() { delete[] peer_downlink_info; }
 };
 
 /**
@@ -5487,7 +5538,7 @@ struct EncryptionConfig {
 
   EncryptionConfig()
     : encryptionMode(AES_128_GCM2),
-      encryptionKey(NULL)
+      encryptionKey(OPTIONAL_NULLPTR)
   {
     memset(encryptionKdfSalt, 0, sizeof(encryptionKdfSalt));
   }
@@ -5558,15 +5609,6 @@ enum PERMISSION_TYPE {
   SCREEN_CAPTURE = 2,
 };
 
-/** The maximum length of the user account.
- */
-enum MAX_USER_ACCOUNT_LENGTH_TYPE
-{
-  /** The maximum length of the user account is 256 bytes.
-   */
-  MAX_USER_ACCOUNT_LENGTH = 256
-};
-
 /**
  * The subscribing state.
  */
@@ -5654,8 +5696,8 @@ struct UserInfo {
    * The user account. The maximum data length is `MAX_USER_ACCOUNT_LENGTH_TYPE`.
    */
   char userAccount[MAX_USER_ACCOUNT_LENGTH];
-  UserInfo()
-      : uid(0) {
+
+  UserInfo() : uid(0) {
     userAccount[0] = '\0';
   }
 };
@@ -5896,22 +5938,6 @@ enum CONFIG_FETCH_TYPE {
 };
 
 
-/**
- * media recorder source stream information
- */
-struct RecorderStreamInfo {
-    /**
-     * The channel ID of the video track.
-     */
-    const char* channelId;
-    /**
-     * The user ID.
-     */
-    uid_t uid;
-    RecorderStreamInfo() : channelId(NULL), uid(0) {}
-};
-
-
 /** The local  proxy mode type. */
 enum LOCAL_PROXY_MODE {
   /** 0: Connect local proxy with high priority, if not connected to local proxy, fallback to sdrtn.
@@ -5975,7 +6001,21 @@ struct LocalAccessPointConfiguration {
   LocalAccessPointConfiguration() : ipList(NULL), ipListSize(0), domainList(NULL), domainListSize(0), verifyDomainName(NULL), mode(ConnectivityFirst) {}
 };
 
-
+/**
+ * The information about recorded media streams.
+ */
+struct RecorderStreamInfo {
+    const char* channelId;
+    /**
+     * The user ID.
+     */
+    uid_t uid;
+    /**
+     * The channel ID of the audio/video stream needs to be recorded.
+     */
+    RecorderStreamInfo() : channelId(NULL), uid(0) {}
+    RecorderStreamInfo(const char* channelId, uid_t uid) : channelId(channelId), uid(uid) {}
+};
 }  // namespace rtc
 
 namespace base {
@@ -5994,9 +6034,9 @@ class AParameter : public agora::util::AutoPtr<IAgoraParameter> {
 
  private:
   bool initialize(IEngineBase* engine) {
-    IAgoraParameter* p = NULL;
+    IAgoraParameter* p = OPTIONAL_NULLPTR;
     if (engine && !engine->queryInterface(rtc::AGORA_IID_PARAMETER_ENGINE, (void**)&p)) reset(p);
-    return p != NULL;
+    return p != OPTIONAL_NULLPTR;
   }
 };
 
@@ -6048,7 +6088,47 @@ struct SpatialAudioParams {
    */
   Optional<bool> enable_doppler;
 };
+/**
+ * Layout info of video stream which compose a transcoder video stream.
+*/
+struct VideoLayout
+{
+  /**
+   * Channel Id from which this video stream come from.
+  */
+  const char* channelId;
+  /**
+   * User id of video stream.
+  */
+  rtc::uid_t uid;
+  /**
+   * User account of video stream.
+  */
+  user_id_t strUid;
+  /**
+   * x coordinate of video stream on a transcoded video stream canvas.
+  */
+  uint32_t x;
+  /**
+   * y coordinate of video stream on a transcoded video stream canvas.
+  */
+  uint32_t y;
+  /**
+   * width of video stream on a transcoded video stream canvas.
+  */
+  uint32_t width;
+  /**
+   * height of video stream on a transcoded video stream canvas.
+  */
+  uint32_t height;
+  /**
+   * video state  of video stream on a transcoded video stream canvas.
+   * 0 for normal video , 1 for placeholder image showed , 2 for black image.
+  */ 
+  uint32_t videoState; 
 
+  VideoLayout() : channelId(OPTIONAL_NULLPTR), uid(0), strUid(OPTIONAL_NULLPTR), x(0), y(0), width(0), height(0), videoState(0) {}
+};
 }  // namespace agora
 
 /**
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/AgoraMediaBase.h b/android/src/main/cpp/third_party/include/agora_rtc/AgoraMediaBase.h
index bd0a7b881..15dfd4b38 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/AgoraMediaBase.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/AgoraMediaBase.h
@@ -1,4 +1,3 @@
-//
 //  Agora Engine SDK
 //
 //  Created by Sting Feng in 2017-11.
@@ -35,10 +34,8 @@ static const unsigned int INVALID_TRACK_ID = 0xffffffff;
 static const unsigned int DEFAULT_CONNECTION_ID = 0;
 static const unsigned int DUMMY_CONNECTION_ID = (std::numeric_limits<unsigned int>::max)();
 
-
 struct EncodedVideoFrameInfo;
 
-
 /**
 * Video source types definition.
 **/
@@ -105,45 +102,49 @@ enum AudioRoute
    */
   ROUTE_DEFAULT = -1,
   /**
-   * The headset.
+   * The Headset.
    */
   ROUTE_HEADSET = 0,
   /**
-   * The earpiece.
+   * The Earpiece.
    */
   ROUTE_EARPIECE = 1,
   /**
-   * The headset with no microphone.
+   * The Headset with no microphone.
    */
   ROUTE_HEADSETNOMIC = 2,
   /**
-   * The speakerphone.
+   * The Speakerphone.
    */
   ROUTE_SPEAKERPHONE = 3,
   /**
-   * The loudspeaker.
+   * The Loudspeaker.
    */
   ROUTE_LOUDSPEAKER = 4,
   /**
-   * The Bluetooth headset.
+   * The Bluetooth Headset via HFP.
    */
   ROUTE_HEADSETBLUETOOTH = 5,
   /**
-   * The USB
+   * The USB.
    */
   ROUTE_USB = 6,
   /**
-   * The HDMI
+   * The HDMI.
    */
   ROUTE_HDMI = 7,
   /**
-   * The DISPLAYPORT
+   * The DisplayPort.
    */
   ROUTE_DISPLAYPORT = 8,
   /**
-   * The AIRPLAY
+   * The AirPlay.
    */
   ROUTE_AIRPLAY = 9,
+  /**
+   * The Bluetooth Speaker via A2DP.
+   */
+  ROUTE_BLUETOOTH_SPEAKER = 10,
 };
 
 /**
@@ -551,6 +552,19 @@ enum CAMERA_VIDEO_SOURCE_TYPE {
   VIDEO_SOURCE_UNSPECIFIED = 2,
 };
 
+/**
+ * The IVideoFrameMetaInfo class.
+ * This interface provides access to metadata information.
+ */
+class IVideoFrameMetaInfo {
+  public:
+    enum META_INFO_KEY {
+      KEY_FACE_CAPTURE = 0,
+    };
+    virtual ~IVideoFrameMetaInfo() {};
+    virtual const char* getMetaInfoStr(META_INFO_KEY key) const = 0;
+};
+
 /**
  * The definition of the ExternalVideoFrame struct.
  */
@@ -698,12 +712,12 @@ struct ExternalVideoFrame {
   uint8_t* alphaBuffer;
 
   /**
-   * [Windows Texture related parameter] The pointer of ID3D11Texture2D used by the video frame.
+   * [For Windows only] The pointer of ID3D11Texture2D used by the video frame.
    */
   void *d3d11_texture_2d;
 
   /**
-   * [Windows Texture related parameter] The index of ID3D11Texture2D array used by the video frame.
+   * [For Windows only] The index of ID3D11Texture2D array used by the video frame.
    */
   int texture_slice_index;
 };
@@ -731,7 +745,8 @@ struct VideoFrame {
   textureId(0),
   d3d11Texture2d(NULL),
   alphaBuffer(NULL),
-  pixelBuffer(NULL){
+  pixelBuffer(NULL),
+  metaInfo(NULL){
     memset(matrix, 0, sizeof(matrix));
   }
   /**
@@ -821,6 +836,10 @@ struct VideoFrame {
    *The type of CVPixelBufferRef, for iOS and macOS only.
    */
   void* pixelBuffer;
+  /**
+   *  The pointer to IVideoFrameMetaInfo, which is the interface to get metainfo contents from VideoFrame. 
+   */
+  IVideoFrameMetaInfo* metaInfo;
 };
 
 /**
@@ -865,6 +884,7 @@ enum VIDEO_MODULE_POSITION {
   POSITION_POST_CAPTURER = 1 << 0,
   POSITION_PRE_RENDERER = 1 << 1,
   POSITION_PRE_ENCODER = 1 << 2,
+  POSITION_POST_CAPTURER_ORIGIN = 1 << 3,
 };
 
 }  // namespace base
@@ -942,10 +962,6 @@ class IAudioFrameObserverBase {
      * are used.
      */
     int64_t renderTimeMs;
-    /**
-     * A reserved parameter.
-     */
-    int avsync_type;
     /**
      * A reserved parameter.
      * 
@@ -953,7 +969,18 @@ class IAudioFrameObserverBase {
      * this will then filled into audio4 extension part, the remote side could use this pts in av
      * sync process with video frame.
      */
+    int avsync_type;
+    /**
+     * The pts timestamp of this audio frame.
+     *
+     * This timestamp is used to indicate the origin pts time of the frame, and sync with video frame by
+     * the pts time stamp
+     */
     int64_t presentationMs;
+     /**
+     * The number of the audio track.
+     */
+    int audioTrackNumber;
 
     AudioFrame() : type(FRAME_TYPE_PCM16),
                    samplesPerChannel(0),
@@ -963,7 +990,8 @@ class IAudioFrameObserverBase {
                    buffer(NULL),
                    renderTimeMs(0),
                    avsync_type(0),
-                   presentationMs(0) {}
+                   presentationMs(0),
+                   audioTrackNumber(0) {}
   };
 
   enum AUDIO_FRAME_POSITION {
@@ -1180,9 +1208,9 @@ struct UserAudioSpectrumInfo  {
    */
   struct AudioSpectrumData spectrumData;
 
-  UserAudioSpectrumInfo () : uid(0), spectrumData() {}
-  UserAudioSpectrumInfo(agora::rtc::uid_t _uid, const float *data, int length) :
-    uid(_uid) { spectrumData.audioSpectrumData = data; spectrumData.dataLength = length; }
+  UserAudioSpectrumInfo() : uid(0) {}
+
+  UserAudioSpectrumInfo(agora::rtc::uid_t uid, const float* data, int length) : uid(uid), spectrumData(data, length) {}
 };
 
 /**
@@ -1205,7 +1233,6 @@ class IAudioSpectrumObserver {
    * - false: Not processed.
    */
   virtual bool onLocalAudioSpectrum(const AudioSpectrumData& data) = 0;
-
   /**
    * Reports the audio spectrum of remote user.
    *
@@ -1223,7 +1250,7 @@ class IAudioSpectrumObserver {
    * - true: Processed.
    * - false: Not processed.
    */
-  virtual bool onRemoteAudioSpectrum(const UserAudioSpectrumInfo * spectrums, unsigned int spectrumNumber) = 0;
+  virtual bool onRemoteAudioSpectrum(const UserAudioSpectrumInfo* spectrums, unsigned int spectrumNumber) = 0;
 };
 
 /**
@@ -1505,7 +1532,7 @@ enum MediaRecorderStreamType {
  */
 enum RecorderState {
   /**
-   * -1: An error occurs during the recording. See RecorderErrorCode for the reason.
+   * -1: An error occurs during the recording. See RecorderReasonCode for the reason.
    */
   RECORDER_STATE_ERROR = -1,
   /**
@@ -1522,27 +1549,27 @@ enum RecorderState {
  *
  * @since v3.5.2
  */
-enum RecorderErrorCode {
+enum RecorderReasonCode {
   /**
    * 0: No error occurs.
    */
-  RECORDER_ERROR_NONE = 0,
+  RECORDER_REASON_NONE = 0,
   /**
    * 1: The SDK fails to write the recorded data to a file.
    */
-  RECORDER_ERROR_WRITE_FAILED = 1,
+  RECORDER_REASON_WRITE_FAILED = 1,
   /**
    * 2: The SDK does not detect audio and video streams to be recorded, or audio and video streams are interrupted for more than five seconds during recording.
    */
-  RECORDER_ERROR_NO_STREAM = 2,
+  RECORDER_REASON_NO_STREAM = 2,
   /**
    * 3: The recording duration exceeds the upper limit.
    */
-  RECORDER_ERROR_OVER_MAX_DURATION = 3,
+  RECORDER_REASON_OVER_MAX_DURATION = 3,
   /**
    * 4: The recording configuration changes.
    */
-  RECORDER_ERROR_CONFIG_CHANGED = 4,
+  RECORDER_REASON_CONFIG_CHANGED = 4,
 };
 /**
  * Configurations for the local audio and video recording.
@@ -1605,7 +1632,6 @@ struct RecorderInfo {
   RecorderInfo(const char* name, unsigned int dur, unsigned int size) : fileName(name), durationMs(dur), fileSize(size) {}
 };
 
-
 class IMediaRecorderObserver {
  public:
   /**
@@ -1619,9 +1645,9 @@ class IMediaRecorderObserver {
    * @param channelId The channel name.
    * @param uid ID of the user.
    * @param state The current recording state. See \ref agora::media::RecorderState "RecorderState".
-   * @param error The reason for the state change. See \ref agora::media::RecorderErrorCode "RecorderErrorCode".
+   * @param reason The reason for the state change. See \ref agora::media::RecorderReasonCode "RecorderReasonCode".
    */
-  virtual void onRecorderStateChanged(const char* channelId, rtc::uid_t uid, RecorderState state, RecorderErrorCode error) = 0;
+  virtual void onRecorderStateChanged(const char* channelId, rtc::uid_t uid, RecorderState state, RecorderReasonCode reason) = 0;
   /**
    * Occurs when the recording information is updated.
    *
@@ -1637,7 +1663,9 @@ class IMediaRecorderObserver {
    *
    */
   virtual void onRecorderInfoUpdated(const char* channelId, rtc::uid_t uid, const RecorderInfo& info) = 0;
+
   virtual ~IMediaRecorderObserver() {}
 };
+
 }  // namespace media
 }  // namespace agora
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/AgoraMediaPlayerTypes.h b/android/src/main/cpp/third_party/include/agora_rtc/AgoraMediaPlayerTypes.h
index d1bb17bb3..3beaba788 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/AgoraMediaPlayerTypes.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/AgoraMediaPlayerTypes.h
@@ -105,61 +105,61 @@ enum MEDIA_PLAYER_STATE {
  * @brief Player error code
  *
  */
-enum MEDIA_PLAYER_ERROR {
+enum MEDIA_PLAYER_REASON {
   /** No error.
    */
-  PLAYER_ERROR_NONE = 0,
+  PLAYER_REASON_NONE = 0,
   /** The parameter is invalid.
    */
-  PLAYER_ERROR_INVALID_ARGUMENTS = -1,
+  PLAYER_REASON_INVALID_ARGUMENTS = -1,
   /** Internel error.
    */
-  PLAYER_ERROR_INTERNAL = -2,
+  PLAYER_REASON_INTERNAL = -2,
   /** No resource.
    */
-  PLAYER_ERROR_NO_RESOURCE = -3,
+  PLAYER_REASON_NO_RESOURCE = -3,
   /** Invalid media source.
    */
-  PLAYER_ERROR_INVALID_MEDIA_SOURCE = -4,
+  PLAYER_REASON_INVALID_MEDIA_SOURCE = -4,
   /** The type of the media stream is unknown.
    */
-  PLAYER_ERROR_UNKNOWN_STREAM_TYPE = -5,
+  PLAYER_REASON_UNKNOWN_STREAM_TYPE = -5,
   /** The object is not initialized.
    */
-  PLAYER_ERROR_OBJ_NOT_INITIALIZED = -6,
+  PLAYER_REASON_OBJ_NOT_INITIALIZED = -6,
   /** The codec is not supported.
    */
-  PLAYER_ERROR_CODEC_NOT_SUPPORTED = -7,
+  PLAYER_REASON_CODEC_NOT_SUPPORTED = -7,
   /** Invalid renderer.
    */
-  PLAYER_ERROR_VIDEO_RENDER_FAILED = -8,
+  PLAYER_REASON_VIDEO_RENDER_FAILED = -8,
   /** An error occurs in the internal state of the player.
    */
-  PLAYER_ERROR_INVALID_STATE = -9,
+  PLAYER_REASON_INVALID_STATE = -9,
   /** The URL of the media file cannot be found.
    */
-  PLAYER_ERROR_URL_NOT_FOUND = -10,
+  PLAYER_REASON_URL_NOT_FOUND = -10,
   /** Invalid connection between the player and the Agora server.
    */
-  PLAYER_ERROR_INVALID_CONNECTION_STATE = -11,
+  PLAYER_REASON_INVALID_CONNECTION_STATE = -11,
   /** The playback buffer is insufficient.
    */
-  PLAYER_ERROR_SRC_BUFFER_UNDERFLOW = -12,
+  PLAYER_REASON_SRC_BUFFER_UNDERFLOW = -12,
   /** The audio mixing file playback is interrupted.
    */
-  PLAYER_ERROR_INTERRUPTED = -13,
+  PLAYER_REASON_INTERRUPTED = -13,
   /** The SDK does not support this function.
    */
-  PLAYER_ERROR_NOT_SUPPORTED = -14,
+  PLAYER_REASON_NOT_SUPPORTED = -14,
   /** The token has expired.
    */
-  PLAYER_ERROR_TOKEN_EXPIRED = -15,
+  PLAYER_REASON_TOKEN_EXPIRED = -15,
   /** The ip has expired.
    */
-  PLAYER_ERROR_IP_EXPIRED = -16,
+  PLAYER_REASON_IP_EXPIRED = -16,
   /** An unknown error occurs.
    */
-  PLAYER_ERROR_UNKNOWN = -17,
+  PLAYER_REASON_UNKNOWN = -17,
 };
 
 /**
@@ -357,18 +357,60 @@ struct CacheStatistics {
   int64_t downloadSize;
 };
 
-struct PlayerUpdatedInfo {
-  /** playerId has value when user trigger interface of opening
+/**
+ * @brief The real time statistics of the media stream being played.
+ *
+ */
+struct PlayerPlaybackStats {
+  /**  Video fps.
    */
-  Optional<const char*> playerId;
-
-  /** deviceId has value when user trigger interface of opening
+  int videoFps;
+  /**  Video bitrate (Kbps).
+   */
+  int videoBitrateInKbps;
+  /**  Audio bitrate (Kbps).
    */
-  Optional<const char*> deviceId;
+  int audioBitrateInKbps;
+  /**  Total bitrate (Kbps).
+   */
+  int totalBitrateInKbps;
+};
 
-  /** cacheStatistics exist if you enable cache, triggered 1s at a time after openning url
+/**
+ * @brief The updated information of media player.
+ *
+ */
+struct PlayerUpdatedInfo {
+  /** @technical preview
    */
-  Optional<CacheStatistics> cacheStatistics;
+  const char* internalPlayerUuid;
+  /** The device ID of the playback device.
+   */
+  const char* deviceId;
+  /**  Video height.
+   */
+  int videoHeight;
+  /**  Video width.
+   */
+  int videoWidth;
+  /**  Audio sample rate.
+   */
+  int audioSampleRate;
+  /**  The audio channel number.
+   */
+  int audioChannels;
+  /**  The bit number of each audio sample.
+   */
+  int audioBitsPerSample;
+
+  PlayerUpdatedInfo()
+      : internalPlayerUuid(NULL),
+        deviceId(NULL),
+        videoHeight(0),
+        videoWidth(0),
+        audioSampleRate(0),
+        audioChannels(0),
+        audioBitsPerSample(0) {}
 };
 
 /**
@@ -436,6 +478,17 @@ struct MediaSource {
    * - false: (Default) Disable cache.
    */
   bool enableCache;
+  /**
+   * Determines whether to enable multi-track audio stream decoding.
+   * Then you can select multi audio track of the media file for playback or publish to channel
+   *
+   * @note
+   * If you use the selectMultiAudioTrack API, you must set enableMultiAudioTrack to true.
+   *
+   * - true: Enable MultiAudioTrack;.
+   * - false: (Default) Disable MultiAudioTrack;.
+   */
+  bool enableMultiAudioTrack;
   /**
    * Determines whether the opened media resource is a stream through the Agora Broadcast Streaming Network(CDN).
    * - true: It is a stream through the Agora Broadcast Streaming Network.
@@ -454,7 +507,7 @@ struct MediaSource {
   IMediaPlayerCustomDataProvider* provider;
 
   MediaSource() : url(NULL), uri(NULL), startPos(0), autoPlay(true), enableCache(false),
-                  provider(NULL){
+                  enableMultiAudioTrack(false), provider(NULL){
   }
 };
 
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraH265Transcoder.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraH265Transcoder.h
index 250d5ad82..b2f5c5b31 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraH265Transcoder.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraH265Transcoder.h
@@ -71,10 +71,8 @@ enum H265_TRANSCODE_RESULT {
 */
 class IH265TranscoderObserver {
  public:
-
   virtual ~IH265TranscoderObserver() {};
 
-
   /**
    * Use to notify the result of invoking enableTranscode interface.
    * @param result Result of invoking enableTranscode interface. There are some processing advice below of result.
@@ -119,9 +117,8 @@ class IH265TranscoderObserver {
 /**
  * The IH265Transcoder class
 */
-class IH265Transcoder: public RefCountInterface {
+class IH265Transcoder : public RefCountInterface {
  public:
-
   /**
    * Enable transcoding for a channel.
    * @param token The token for authentication.
@@ -154,7 +151,6 @@ class IH265Transcoder: public RefCountInterface {
    * - <0: Failure.
   */
   virtual int triggerTranscode(const char* token, const char* channel, uid_t uid) = 0;
-
   /**
    * Register a IH265TranscoderObserver object.
    * @param observer IH265TranscoderObserver.
@@ -163,7 +159,6 @@ class IH265Transcoder: public RefCountInterface {
    * - <0: Failure.
   */
   virtual int registerTranscoderObserver(IH265TranscoderObserver *observer) = 0;
-
   /**
    * Unregister a IH265TranscoderObserver object.
    * @param observer IH265TranscoderObserver.
@@ -178,5 +173,6 @@ class IH265Transcoder: public RefCountInterface {
   virtual ~IH265Transcoder() {};
 
 };
+
 } // namespace rtc
 } // namespace agora
\ No newline at end of file
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraLog.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraLog.h
index f3952163a..2fae3aa13 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraLog.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraLog.h
@@ -75,7 +75,7 @@ const uint32_t MAX_LOG_SIZE = 20 * 1024 * 1024;  // 20MB
 const uint32_t MIN_LOG_SIZE = 128 * 1024;        // 128KB
 /** The default log size in kb
  */
-const uint32_t DEFAULT_LOG_SIZE_IN_KB = 1024;
+const uint32_t DEFAULT_LOG_SIZE_IN_KB = 2048;
 
 /** Definition of LogConfiguration
  */
@@ -83,7 +83,7 @@ struct LogConfig {
   /**The log file path, default is NULL for default log path
    */
   const char* filePath;
-  /** The log file size, KB , set 1024KB to use default log size
+  /** The log file size, KB , set 2048KB to use default log size
    */
   uint32_t fileSizeInKB;
   /** The log level, set LOG_LEVEL_INFO to use default log level
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaEngine.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaEngine.h
index e2f8e06a9..e57404a22 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaEngine.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaEngine.h
@@ -58,7 +58,6 @@ class IMediaEngine {
    * - < 0: Failure.
    */
   virtual int registerVideoFrameObserver(IVideoFrameObserver* observer) = 0;
-
   /**
    * Registers a receiver object for the encoded video image.
    *
@@ -73,7 +72,6 @@ class IMediaEngine {
    * - < 0: Failure.
    */
   virtual int registerVideoEncodedFrameObserver(IVideoEncodedFrameObserver* observer) = 0;
-
   /**
    * Pushes the external audio data to the app.
    *
@@ -83,7 +81,8 @@ class IMediaEngine {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int pushAudioFrame(IAudioFrameObserver::AudioFrame* frame, rtc::track_id_t trackId = 0) = 0;
+   
+  virtual int pushAudioFrame(IAudioFrameObserverBase::AudioFrame* frame, rtc::track_id_t trackId = 0) = 0;
 
   /**
    * Pulls the remote audio data.
@@ -101,7 +100,7 @@ class IMediaEngine {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int pullAudioFrame(IAudioFrameObserver::AudioFrame* frame) = 0;
+  virtual int pullAudioFrame(IAudioFrameObserverBase::AudioFrame* frame) = 0;
 
   /**
    * Sets the external video source.
@@ -237,7 +236,6 @@ class IMediaEngine {
    * - < 0: Failure.
    */
   virtual int pushVideoFrame(base::ExternalVideoFrame* frame, unsigned int videoTrackId = 0) = 0;
-
   /**
    * Pushes the encoded video image to the app.
    * @param imageBuffer A pointer to the video image.
@@ -248,10 +246,9 @@ class IMediaEngine {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int pushEncodedVideoImage(const uint8_t* imageBuffer, size_t length,
+  virtual int pushEncodedVideoImage(const unsigned char* imageBuffer, size_t length,
                                     const agora::rtc::EncodedVideoFrameInfo& videoEncodedFrameInfo,
                                     unsigned int videoTrackId = 0) = 0;
-
   /**
    * @hide For internal usage only
    */
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaPlayer.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaPlayer.h
index cb5c8738e..bd3c7597c 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaPlayer.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaPlayer.h
@@ -158,13 +158,30 @@ class IMediaPlayer : public RefCountInterface {
 
   /**
    * Slect playback audio track of the media file
-   * @param speed the index of the audio track in meia file
+   * @param index the index of the audio track in media file
    * @return
    * - 0: Success.
    * - < 0: Failure.
    */
   virtual int selectAudioTrack(int index) = 0;
 
+  /**
+   * Selects multi audio track of the media file for playback or publish to channel.
+   * @param playoutTrackIndex The index of the audio track in media file for local playback.
+   * @param publishTrackIndex The index of the audio track in the media file published to the remote.
+   * 
+   * @note
+   * You can obtain the streamIndex of the audio track by calling getStreamInfo..
+   * If you want to use selectMultiAudioTrack, you need to open the media file with openWithMediaSource and set enableMultiAudioTrack to true.
+   *
+   * @return
+   * - 0: Success.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
+   * - -2: Invalid argument. Argument must be greater than or equal to zero.
+   * - -8: Invalid State.You must open the media file with openWithMediaSource and set enableMultiAudioTrack to true
+   */
+  virtual int selectMultiAudioTrack(int playoutTrackIndex, int publishTrackIndex) = 0;
+
   /**
    * change player option before play a file
    * @param key the key of the option param
@@ -217,7 +234,7 @@ class IMediaPlayer : public RefCountInterface {
    * @brief Turn mute on or off
    *
    * @param muted Whether to mute on
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int mute(bool muted) = 0;
 
@@ -225,7 +242,7 @@ class IMediaPlayer : public RefCountInterface {
    * @brief Get mute state
    *
    * @param[out] muted Whether is mute on
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int getMute(bool& muted) = 0;
 
@@ -237,7 +254,7 @@ class IMediaPlayer : public RefCountInterface {
    * 0: mute;
    * 100: original volume;
    * 400: Up to 4 times the original volume (with built-in overflow protection).
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int adjustPlayoutVolume(int volume) = 0;
 
@@ -245,21 +262,21 @@ class IMediaPlayer : public RefCountInterface {
    * @brief Get the current playback volume
    *
    * @param[out] volume
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int getPlayoutVolume(int& volume) = 0;
 
   /**
    * @brief adjust publish signal volume
    *
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int adjustPublishSignalVolume(int volume) = 0;
 
   /**
    * @brief get publish signal volume
    *
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int getPublishSignalVolume(int& volume) = 0;
 
@@ -267,7 +284,7 @@ class IMediaPlayer : public RefCountInterface {
    * @brief Set video rendering view
    *
    * @param view view object, windows platform is HWND
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int setView(media::base::view_t view) = 0;
 
@@ -275,7 +292,7 @@ class IMediaPlayer : public RefCountInterface {
    * @brief Set video display mode
    *
    * @param renderMode Video display mode
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int setRenderMode(media::base::RENDER_MODE_TYPE renderMode) = 0;
 
@@ -337,7 +354,7 @@ class IMediaPlayer : public RefCountInterface {
    * @brief Register the player video observer
    *
    * @param observer observer object
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int registerVideoFrameObserver(media::base::IVideoFrameObserver* observer) = 0;
 
@@ -345,7 +362,7 @@ class IMediaPlayer : public RefCountInterface {
    * @brief UnRegister the player video observer
    *
    * @param observer observer object
-   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_ERROR
+   * @return int < 0 on behalf of an error, the value corresponds to one of MEDIA_PLAYER_REASON
    */
   virtual int unregisterVideoFrameObserver(agora::media::base::IVideoFrameObserver* observer) = 0;
 
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaPlayerSource.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaPlayerSource.h
index 8d1a95be0..00be02233 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaPlayerSource.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaPlayerSource.h
@@ -118,7 +118,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param [out] pos A reference to the current playback position (ms).
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int getPlayPosition(int64_t& pos) = 0;
 
@@ -127,7 +127,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param [out] count The number of the media streams in the media source.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int getStreamCount(int64_t& count) = 0;
 
@@ -137,7 +137,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param [out] info The detailed information of the media stream. See \ref media::base::PlayerStreamInfo "PlayerStreamInfo" for details.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int getStreamInfo(int64_t index, media::base::PlayerStreamInfo* info) = 0;
 
@@ -149,7 +149,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * - -1: Play the media file in a loop indefinitely, until {@link stop} is called.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int setLoopCount(int64_t loopCount) = 0;
 
@@ -158,7 +158,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param speed The playback speed ref [50-400].
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int setPlaybackSpeed(int speed) = 0;
 
@@ -167,17 +167,34 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param index The index of the audio track in media file.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int selectAudioTrack(int64_t index) = 0;
 
+  /**
+   * Selects multi audio track of the media file for playback or publish to channel.
+   * @param playoutTrackIndex The index of the audio track in media file for local playback.
+   * @param publishTrackIndex The index of the audio track in the media file published to the remote.
+   *
+   * @note
+   * You can obtain the streamIndex of the audio track by calling getStreamInfo..
+   * If you want to use selectMultiAudioTrack, you need to open the media file with openWithMediaSource and set enableMultiAudioTrack to true.
+   *
+   * @return
+   * - 0: Success.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
+   * - -2: Invalid argument. Argument must be greater than or equal to zero.
+   * - -8: Invalid State.You must open the media file with openWithMediaSource and set enableMultiAudioTrack to true
+   */
+  virtual int selectMultiAudioTrack(int playoutTrackIndex, int publishTrackIndex) = 0;
+
   /**
    * Changes the player option before playing a file.
    * @param key The key of the option paramemter.
    * @param value The value of option parameter.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int setPlayerOption(const char* key, int64_t value) = 0;
 
@@ -187,7 +204,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param value The value of option parameter.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int setPlayerOption(const char* key, const char* value) = 0;
 
@@ -196,7 +213,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param filename The filename of the screenshot file.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int takeScreenshot(const char* filename) = 0;
 
@@ -205,7 +222,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param index The index of the internal subtitles.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int selectInternalSubtitle(int64_t index) = 0;
 
@@ -214,7 +231,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param url The URL of the subtitle file.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int setExternalSubtitle(const char* url) = 0;
 
@@ -231,7 +248,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param observer The pointer to the IMediaPlayerSourceObserver object.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int registerPlayerSourceObserver(IMediaPlayerSourceObserver* observer) = 0;
 
@@ -240,7 +257,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param observer The pointer to the IMediaPlayerSourceObserver object.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int unregisterPlayerSourceObserver(IMediaPlayerSourceObserver* observer) = 0;
 
@@ -250,7 +267,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param observer The pointer to the {@link media::IAudioPcmFrameSink observer} object.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int registerAudioFrameObserver(media::IAudioPcmFrameSink* observer) = 0;
 
@@ -259,7 +276,7 @@ class IMediaPlayerSource : public RefCountInterface {
    * @param observer The pointer to the {@link media::IAudioPcmFrameSink observer} object.
    * @return
    * - 0: Success.
-   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * - < 0: Failure. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual int unregisterAudioFrameObserver(media::IAudioPcmFrameSink* observer) = 0;
 
@@ -380,18 +397,19 @@ class IMediaPlayerSourceObserver {
    *
    * When the state of the playback changes, the SDK triggers this callback to report the new playback state and the reason or error for the change.
    * @param state The new playback state after change. See {@link media::base::MEDIA_PLAYER_STATE MEDIA_PLAYER_STATE}.
-   * @param ec The player's error code. See {@link media::base::MEDIA_PLAYER_ERROR MEDIA_PLAYER_ERROR}.
+   * @param reason The player's error code. See {@link media::base::MEDIA_PLAYER_REASON MEDIA_PLAYER_REASON}.
    */
   virtual void onPlayerSourceStateChanged(media::base::MEDIA_PLAYER_STATE state,
-                                          media::base::MEDIA_PLAYER_ERROR ec) = 0;
+                                          media::base::MEDIA_PLAYER_REASON reason) = 0;
 
   /**
    * @brief Reports current playback progress.
    *
    * The callback occurs once every one second during the playback and reports the current playback progress.
-   * @param position Current playback progress (milisecond).
+   * @param positionMs Current playback progress (milisecond).
+   * @param timestampMs Current NTP(Network Time Protocol) time (milisecond).
    */
-  virtual void onPositionChanged(int64_t position_ms) = 0;
+  virtual void onPositionChanged(int64_t positionMs, int64_t timestampMs) = 0;
 
   /**
    * @brief Reports the playback event.
@@ -455,6 +473,24 @@ class IMediaPlayerSourceObserver {
    * @param info Include information of media player.
    */
   virtual void onPlayerInfoUpdated(const media::base::PlayerUpdatedInfo& info) = 0;
+
+   /**
+   * @brief Triggered every 1 second, reports the statistics of the files being cached.
+   * 
+   * @param stats Cached file statistics.
+   */
+  virtual void onPlayerCacheStats(const media::base::CacheStatistics& stats) {
+    (void)stats;
+  }
+
+   /**
+   * @brief Triggered every 1 second, reports the statistics of the media stream being played.
+   * 
+   * @param stats The statistics of the media stream.
+   */
+  virtual void onPlayerPlaybackStats(const media::base::PlayerPlaybackStats& stats) {
+    (void)stats;
+  }
   
   /**
    * @brief Triggered  every 200 millisecond ,update player current volume range [0,255]
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaRecorder.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaRecorder.h
index 6a4765f31..17375607c 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaRecorder.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMediaRecorder.h
@@ -15,6 +15,7 @@ namespace rtc {
 class IMediaRecorder : public RefCountInterface {
  protected:
   virtual ~IMediaRecorder() {}
+
  public:
   /**
    * Registers the IMediaRecorderObserver object.
@@ -62,8 +63,7 @@ class IMediaRecorder : public RefCountInterface {
    *      - The specified path of the recording file exists and is writable.
    *      - The specified format of the recording file is supported.
    *      - The maximum recording duration is correctly set.
-   *      - During remote recording, ensure the channel ID and user ID After calling \ref 
-   *        IRtcEngine::createMediaRecorder did join the channel.
+   *      - During remote recording, ensure the user whose media streams you want record did join the channel.
    *    - `-4(ERR_NOT_SUPPORTED)`: IRtcEngine does not support the request due to one of the following reasons:
    *      - The recording is ongoing.
    *      - The recording stops because an error occurs.
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMusicContentCenter.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMusicContentCenter.h
index 1889bbdea..d5ed99ef8 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMusicContentCenter.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraMusicContentCenter.h
@@ -44,36 +44,36 @@ typedef enum
     /**
      * 1: A general error occurs.
      */
-    kMusicContentCenterStatusErr = 1,
+    kMusicContentCenterStatusError = 1,
     /**
      * 2: The gateway error. There are several possible reasons:
      *  - Token is expired. Check if your token is expired.
      *  - Token is invalid. Check the type of token you passed in.
      *  - Network error. Check your network.
      */
-    kMusicContentCenterStatusErrGateway = 2,
+    kMusicContentCenterStatusGateway = 2,
     /**
      * 3: Permission and resource error. There are several possible reasons:
      *  - Your appid may not have the mcc permission. Please contact technical support 
      *  - The resource may not exist. Please contact technical support
      */
-    kMusicContentCenterStatusErrPermissionAndResource = 3,
+    kMusicContentCenterStatusPermissionAndResource = 3,
     /**
      * 4: Internal data parse error. Please contact technical support
      */
-    kMusicContentCenterStatusErrInternalDataParse = 4,
+    kMusicContentCenterStatusInternalDataParse = 4,
     /**
      * 5: Music loading error. Please contact technical support
      */
-    kMusicContentCenterStatusErrMusicLoading = 5,
+    kMusicContentCenterStatusMusicLoading = 5,
     /**
      * 6: Music decryption error. Please contact technical support
      */
-    kMusicContentCenterStatusErrMusicDecryption = 6, 
+    kMusicContentCenterStatusMusicDecryption = 6, 
     /**
      * 7: Http internal error. Please retry later.
      */
-    kMusicContentCenterStatusErrHttpInternalError = 7, 
+    kMusicContentCenterStatusHttpInternalError = 7, 
 } MusicContentCenterStatusCode;
 
 typedef struct 
@@ -234,18 +234,18 @@ class IMusicContentCenterEventHandler {
      * 
      * @param requestId The request id is same as that returned by getMusicCharts.
      * @param result The result of music chart collection
-     * @param errorCode The status of the request. See MusicContentCenterStatusCode
+     * @param status The status of the request. See MusicContentCenterStatusCode
      */
-    virtual void onMusicChartsResult(const char* requestId, agora_refptr<MusicChartCollection> result, MusicContentCenterStatusCode errorCode) = 0;
+    virtual void onMusicChartsResult(const char* requestId, agora_refptr<MusicChartCollection> result, MusicContentCenterStatusCode status) = 0;
 
     /**
      * Music collection, occurs when getMusicCollectionByMusicChartId or searchMusic method is called.
      * 
      * @param requestId The request id is same as that returned by getMusicCollectionByMusicChartId or searchMusic
      * @param result The result of music collection
-     * @param errorCode The status of the request. See MusicContentCenterStatusCode
+     * @param status The status of the request. See MusicContentCenterStatusCode
      */
-    virtual void onMusicCollectionResult(const char* requestId, agora_refptr<MusicCollection> result, MusicContentCenterStatusCode errorCode) = 0;
+    virtual void onMusicCollectionResult(const char* requestId, agora_refptr<MusicCollection> result, MusicContentCenterStatusCode status) = 0;
 
     /**
      * Lyric url callback of getLyric, occurs when getLyric is called
@@ -253,9 +253,9 @@ class IMusicContentCenterEventHandler {
      * @param requestId The request id is same as that returned by getLyric
      * @param songCode Song code
      * @param lyricUrl  The lyric url of this music
-     * @param errorCode The status of the request. See MusicContentCenterStatusCode
+     * @param status The status of the request. See MusicContentCenterStatusCode
      */
-    virtual void onLyricResult(const char* requestId, int64_t songCode, const char* lyricUrl, MusicContentCenterStatusCode errorCode) = 0;
+    virtual void onLyricResult(const char* requestId, int64_t songCode, const char* lyricUrl, MusicContentCenterStatusCode status) = 0;
 
     /**
      * Simple info callback of getSongSimpleInfo, occurs when getSongSimpleInfo is called
@@ -263,9 +263,9 @@ class IMusicContentCenterEventHandler {
      * @param requestId The request id is same as that returned by getSongSimpleInfo.
      * @param songCode Song code
      * @param simpleInfo The metadata of the music.
-     * @param errorCode The status of the request. See MusicContentCenterStatusCode
+     * @param status The status of the request. See MusicContentCenterStatusCode
      */
-    virtual void onSongSimpleInfoResult(const char* requestId, int64_t songCode, const char* simpleInfo, MusicContentCenterStatusCode errorCode) = 0;
+    virtual void onSongSimpleInfoResult(const char* requestId, int64_t songCode, const char* simpleInfo, MusicContentCenterStatusCode status) = 0;
 
     /**
      * Preload process callback, occurs when preload is called
@@ -274,10 +274,10 @@ class IMusicContentCenterEventHandler {
      * @param songCode Song code
      * @param percent Preload progress (0 ~ 100)
      * @param lyricUrl  The lyric url of this music
-     * @param status Preload status; see PreloadStatusCode.
-     * @param errorCode The status of the request. See MusicContentCenterStatusCode
+     * @param preloadStatus Preload status; see PreloadStatusCode.
+     * @param mccStatus The status of the request. See MusicContentCenterStatusCode
      */
-    virtual void onPreLoadEvent(const char* requestId, int64_t songCode, int percent, const char* lyricUrl, PreloadStatusCode status, MusicContentCenterStatusCode errorCode) = 0;
+    virtual void onPreLoadEvent(const char* requestId, int64_t songCode, int percent, const char* lyricUrl, PreloadStatusCode preloadStatus, MusicContentCenterStatusCode mccStatus) = 0;
 
     virtual ~IMusicContentCenterEventHandler() {};
 };
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraParameter.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraParameter.h
index 70ea5939e..b88969e1d 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraParameter.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraParameter.h
@@ -15,6 +15,7 @@
  */
 
 #pragma once  // NOLINT(build/header_guard)
+#include "AgoraRefPtr.h"
 
 // external key
 /**
@@ -115,6 +116,7 @@
  * set the video codec type, such as "H264", "JPEG"
  */
 #define KEY_RTC_VIDEO_CODEC_TYPE                      "engine.video.codec_type"
+#define KEY_RTC_VIDEO_MINOR_STREAM_CODEC_TYPE         "engine.video.minor_stream_codec_type"
 #define KEY_RTC_VIDEO_CODEC_INDEX                     "che.video.videoCodecIndex"
 /**
   * only use average QP for quality scaling
@@ -144,7 +146,7 @@ typedef CopyableAutoPtr<IString> AString;
 
 namespace base {
 
-class IAgoraParameter {
+class IAgoraParameter : public RefCountInterface {
  public:
   /**
    * release the resource
@@ -300,6 +302,7 @@ class IAgoraParameter {
 
   virtual int convertPath(const char* filePath, agora::util::AString& value) = 0;
 
+  protected:
   virtual ~IAgoraParameter() {}
 };
 
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRhythmPlayer.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRhythmPlayer.h
index b39322a2d..e2e00ac70 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRhythmPlayer.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRhythmPlayer.h
@@ -35,19 +35,19 @@ enum RHYTHM_PLAYER_STATE_TYPE {
 };
 
 /**
- The error codes of the rhythm player.
+ The reason codes of the rhythm player.
  */
-enum RHYTHM_PLAYER_ERROR_TYPE {
+enum RHYTHM_PLAYER_REASON {
   /** 0: The rhythm player works well. */
-  RHYTHM_PLAYER_ERROR_OK = 0,
+  RHYTHM_PLAYER_REASON_OK = 0,
   /** 1: The rhythm player occurs a internal error. */
-  RHYTHM_PLAYER_ERROR_FAILED = 1,
+  RHYTHM_PLAYER_REASON_FAILED = 1,
   /** 801: The rhythm player can not open the file. */
-  RHYTHM_PLAYER_ERROR_CAN_NOT_OPEN = 801,
+  RHYTHM_PLAYER_REASON_CAN_NOT_OPEN = 801,
   /** 802: The rhythm player can not play the file. */
-  RHYTHM_PLAYER_ERROR_CAN_NOT_PLAY,
+  RHYTHM_PLAYER_REASON_CAN_NOT_PLAY,
   /** 803: The file duration over the limit. The file duration limit is 1.2 seconds */
-  RHYTHM_PLAYER_ERROR_FILE_OVER_DURATION_LIMIT,
+  RHYTHM_PLAYER_REASON_FILE_OVER_DURATION_LIMIT,
 };
 
 /**
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRtcEngine.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRtcEngine.h
index a54f24395..719a25f6c 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRtcEngine.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRtcEngine.h
@@ -15,6 +15,9 @@
 #include "IAgoraH265Transcoder.h"
 
 namespace agora {
+namespace rtm {
+class IStreamChannel;
+}
 namespace rtc {
 
 template <typename T>
@@ -257,87 +260,87 @@ struct RtcConnection;
  */
 struct LocalVideoStats
 {
-    /**
-     * ID of the local user.
-     */
-    uid_t uid;
-    /** The actual bitrate (Kbps) while sending the local video stream.
-     * @note This value does not include the bitrate for resending the video after packet loss.
-     */
-    int sentBitrate;
-    /** The actual frame rate (fps) while sending the local video stream.
-     * @note This value does not include the frame rate for resending the video after packet loss.
-     */
-    int sentFrameRate;
-    /** The capture frame rate (fps) of the local video.
-     */
-    int captureFrameRate;
-    /** The width of the capture frame (px).
-     */
-    int captureFrameWidth;
-    /** The height of the capture frame (px).
-     */
-    int captureFrameHeight;
-    /**
-     * The regulated frame rate of capture frame rate according to video encoder configuration.
-     */
-    int regulatedCaptureFrameRate;
-    /**
-     * The regulated frame width (pixel) of capture frame width according to video encoder configuration.
-     */
-    int regulatedCaptureFrameWidth;
-    /**
-     * The regulated frame height (pixel) of capture frame height according to video encoder configuration.
-     */
-    int regulatedCaptureFrameHeight;
-    /** The output frame rate (fps) of the local video encoder.
-     */
-    int encoderOutputFrameRate;
-    /** The width of the encoding frame (px).
-     */
-    int encodedFrameWidth;
-    /** The height of the encoding frame (px).
-     */
-    int encodedFrameHeight;
-    /** The output frame rate (fps) of the local video renderer.
-     */
-    int rendererOutputFrameRate;
-    /** The target bitrate (Kbps) of the current encoder. This is an estimate made by the SDK based on the current network conditions.
-     */
-    int targetBitrate;
-    /** The target frame rate (fps) of the current encoder.
-     */
-    int targetFrameRate;
-    /** Quality adaption of the local video stream in the reported interval (based on the target frame
-     * rate and target bitrate). See #QUALITY_ADAPT_INDICATION.
-     */
-    QUALITY_ADAPT_INDICATION qualityAdaptIndication;
-    /** The bitrate (Kbps) while encoding the local video stream.
-     * @note This value does not include the bitrate for resending the video after packet loss.
-     */
-    int encodedBitrate;
-    /** The number of the sent video frames, represented by an aggregate value.
-     */
-    int encodedFrameCount;
-    /** The codec type of the local video. See #VIDEO_CODEC_TYPE.
-     */
-    VIDEO_CODEC_TYPE codecType;
-    /**
-     * The video packet loss rate (%) from the local client to the Agora server before applying the anti-packet loss strategies.
-     */
-    unsigned short txPacketLossRate;
-    /** The brightness level of the video image captured by the local camera. See #CAPTURE_BRIGHTNESS_LEVEL_TYPE.
-     */
-    CAPTURE_BRIGHTNESS_LEVEL_TYPE captureBrightnessLevel;
-    /**
-     * Whether we send dual stream now.
-     */
-    bool dualStreamEnabled;
-    /** The hwEncoderAccelerating of the local video:
-     * - software = 0.
-     * - hardware = 1.
-     */
-    int hwEncoderAccelerating;
+  /**
+  * ID of the local user.
+  */
+  uid_t uid;
+  /** The actual bitrate (Kbps) while sending the local video stream.
+    * @note This value does not include the bitrate for resending the video after packet loss.
+    */
+  int sentBitrate;
+  /** The actual frame rate (fps) while sending the local video stream.
+    * @note This value does not include the frame rate for resending the video after packet loss.
+    */
+  int sentFrameRate;
+  /** The capture frame rate (fps) of the local video.
+    */
+  int captureFrameRate;
+  /** The width of the capture frame (px).
+    */
+  int captureFrameWidth;
+  /** The height of the capture frame (px).
+    */
+  int captureFrameHeight;
+  /**
+    * The regulated frame rate of capture frame rate according to video encoder configuration.
+    */
+  int regulatedCaptureFrameRate;
+  /**
+    * The regulated frame width (pixel) of capture frame width according to video encoder configuration.
+    */
+  int regulatedCaptureFrameWidth;
+  /**
+    * The regulated frame height (pixel) of capture frame height according to video encoder configuration.
+    */
+  int regulatedCaptureFrameHeight;
+  /** The output frame rate (fps) of the local video encoder.
+    */
+  int encoderOutputFrameRate;
+  /** The width of the encoding frame (px).
+    */
+  int encodedFrameWidth;
+  /** The height of the encoding frame (px).
+    */
+  int encodedFrameHeight;
+  /** The output frame rate (fps) of the local video renderer.
+    */
+  int rendererOutputFrameRate;
+  /** The target bitrate (Kbps) of the current encoder. This is an estimate made by the SDK based on the current network conditions.
+    */
+  int targetBitrate;
+  /** The target frame rate (fps) of the current encoder.
+    */
+  int targetFrameRate;
+  /** Quality adaption of the local video stream in the reported interval (based on the target frame
+    * rate and target bitrate). See #QUALITY_ADAPT_INDICATION.
+    */
+  QUALITY_ADAPT_INDICATION qualityAdaptIndication;
+  /** The bitrate (Kbps) while encoding the local video stream.
+    * @note This value does not include the bitrate for resending the video after packet loss.
+    */
+  int encodedBitrate;
+  /** The number of the sent video frames, represented by an aggregate value.
+    */
+  int encodedFrameCount;
+  /** The codec type of the local video. See #VIDEO_CODEC_TYPE.
+    */
+  VIDEO_CODEC_TYPE codecType;
+  /**
+    * The video packet loss rate (%) from the local client to the Agora server before applying the anti-packet loss strategies.
+    */
+  unsigned short txPacketLossRate;
+  /** The brightness level of the video image captured by the local camera. See #CAPTURE_BRIGHTNESS_LEVEL_TYPE.
+    */
+  CAPTURE_BRIGHTNESS_LEVEL_TYPE captureBrightnessLevel;
+  /**
+    * Whether we send dual stream now.
+    */
+  bool dualStreamEnabled;
+  /** The hwEncoderAccelerating of the local video:
+    * - software = 0.
+    * - hardware = 1.
+    */
+  int hwEncoderAccelerating;
 };
 
 /**
@@ -441,25 +444,25 @@ struct RemoteAudioStats
    */
   unsigned int rxAudioBytes;
 
-  RemoteAudioStats() :
-    uid(0),
-    quality(0),
-    networkTransportDelay(0),
-    jitterBufferDelay(0),
-    audioLossRate(0),
-    numChannels(0),
-    receivedSampleRate(0),
-    receivedBitrate(0),
-    totalFrozenTime(0),
-    frozenRate(0),
-    mosValue(0),
-    frozenRateByCustomPlcCount(0),
-    plcCount(0),
-    totalActiveTime(0),
-    publishDuration(0),
-    qoeQuality(0),
-    qualityChangedReason(0),
-    rxAudioBytes(0) {}
+  RemoteAudioStats()
+      : uid(0),
+        quality(0),
+        networkTransportDelay(0),
+        jitterBufferDelay(0),
+        audioLossRate(0),
+        numChannels(0),
+        receivedSampleRate(0),
+        receivedBitrate(0),
+        totalFrozenTime(0),
+        frozenRate(0),
+        mosValue(0),
+        frozenRateByCustomPlcCount(0),
+        plcCount(0),
+        totalActiveTime(0),
+        publishDuration(0),
+        qoeQuality(0),
+        qualityChangedReason(0),
+        rxAudioBytes(0) {}
 };
 
 /**
@@ -575,8 +578,7 @@ struct VideoCompositingLayout {
      */
     double alpha;
 
-    media::base::RENDER_MODE_TYPE
-    renderMode;  // RENDER_MODE_HIDDEN: Crop, RENDER_MODE_FIT: Zoom to fit
+    media::base::RENDER_MODE_TYPE renderMode;  // RENDER_MODE_HIDDEN: Crop, RENDER_MODE_FIT: Zoom to fit
 
     Region()
         : uid(0),
@@ -619,10 +621,10 @@ struct VideoCompositingLayout {
   VideoCompositingLayout()
       : canvasWidth(0),
         canvasHeight(0),
-        backgroundColor(NULL),
+        backgroundColor(OPTIONAL_NULLPTR),
         regions(NULL),
         regionCount(0),
-        appData(NULL),
+        appData(OPTIONAL_NULLPTR),
         appDataLength(0) {}
 };
 
@@ -1033,7 +1035,7 @@ struct ChannelMediaOptions {
    * - `false`: (Default) Do not publish the video track of the secondary camera capturer.
    */
   Optional<bool> publishSecondaryCameraTrack;
-  /**
+    /**
    * Whether to publish the video of the third camera track.
    * - `true`:  Publish the video track of the third camera capturer.
    * - `false`: (Default) Do not publish the video track of the third camera capturer.
@@ -1078,7 +1080,7 @@ struct ChannelMediaOptions {
    * - false: (Default) Do not publish the captured video from the secondary screen.
    */
   Optional<bool> publishSecondaryScreenTrack;
-  /**
+    /**
    * Whether to publish the captured video from the third screen:
    * - true: Publish the captured video from the third screen.
    * - false: (Default) Do not publish the captured video from the third screen.
@@ -1132,6 +1134,12 @@ struct ChannelMediaOptions {
   * - `false`: (Default) Do not publish the local transcoded video track.
   */
   Optional<bool> publishTranscodedVideoTrack;
+    /**
+  * Whether to publish the local mixed track.
+  * - `true`: Publish the audio track of local mixed track.
+  * - `false`: (Default) Do not publish the local mixed track.
+  */
+  Optional<bool> publishMixedAudioTrack;
   /**
    * Whether to automatically subscribe to all remote audio streams when the user joins a channel:
    * - `true`: (Default) Subscribe to all remote audio streams.
@@ -1235,7 +1243,7 @@ struct ChannelMediaOptions {
       SET_FROM(publishCameraTrack);
       SET_FROM(publishSecondaryCameraTrack);
       SET_FROM(publishThirdCameraTrack);
-      SET_FROM(publishFourthCameraTrack);
+      SET_FROM(publishFourthCameraTrack);      
       SET_FROM(publishMicrophoneTrack);
 #if defined(__ANDROID__) || (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE)
       SET_FROM(publishScreenCaptureVideo);
@@ -1247,6 +1255,7 @@ struct ChannelMediaOptions {
       SET_FROM(publishFourthScreenTrack);
 #endif
       SET_FROM(publishTranscodedVideoTrack);
+      SET_FROM(publishMixedAudioTrack);
       SET_FROM(publishCustomAudioTrack);
       SET_FROM(publishCustomAudioTrackId);
       SET_FROM(publishCustomVideoTrack);
@@ -1293,6 +1302,7 @@ struct ChannelMediaOptions {
       ADD_COMPARE(publishFourthScreenTrack);
 #endif
       ADD_COMPARE(publishTranscodedVideoTrack);
+      ADD_COMPARE(publishMixedAudioTrack);
       ADD_COMPARE(publishCustomAudioTrack);
       ADD_COMPARE(publishCustomAudioTrackId);
       ADD_COMPARE(publishCustomVideoTrack);
@@ -1342,6 +1352,7 @@ struct ChannelMediaOptions {
         REPLACE_BY(publishFourthScreenTrack);
 #endif
         REPLACE_BY(publishTranscodedVideoTrack);
+        REPLACE_BY(publishMixedAudioTrack);
         REPLACE_BY(publishCustomAudioTrack);
         REPLACE_BY(publishCustomAudioTrackId);
         REPLACE_BY(publishCustomVideoTrack);
@@ -1512,8 +1523,7 @@ class IRtcEngineEventHandler {
   @param delay The network delay (ms) from the sender to the receiver, including the delay caused by audio sampling pre-processing, network transmission, and network jitter buffering.
   @param lost The audio packet loss rate (%) from the sender to the receiver.
   */
-  virtual void onAudioQuality(uid_t uid, int quality, unsigned short delay,
-                              unsigned short lost) __deprecated {
+  virtual void onAudioQuality(uid_t uid, int quality, unsigned short delay, unsigned short lost) __deprecated {
     (void)uid;
     (void)quality;
     (void)delay;
@@ -1615,6 +1625,7 @@ class IRtcEngineEventHandler {
    If the startAudioMixing method call fails, the SDK returns the error code 701.
    */
   virtual void onAudioMixingFinished() __deprecated {}
+
   /**
    * Occurs when the playback of the local audio effect file finishes.
    *
@@ -1782,7 +1793,7 @@ class IRtcEngineEventHandler {
     (void)width;
     (void)height;
     (void)rotation;
-  }
+  }  
 
   /** Occurs when the local video stream state changes.
    *
@@ -1792,13 +1803,13 @@ class IRtcEngineEventHandler {
    * you to troubleshoot issues when exceptions occur.
    *
    * The SDK triggers the onLocalVideoStateChanged callback with the state code of `LOCAL_VIDEO_STREAM_STATE_FAILED`
-   * and error code of `LOCAL_VIDEO_STREAM_ERROR_CAPTURE_FAILURE` in the following situations:
+   * and error code of `LOCAL_VIDEO_STREAM_REASON_CAPTURE_FAILURE` in the following situations:
    * - The app switches to the background, and the system gets the camera resource.
    * - The camera starts normally, but does not output video for four consecutive seconds.
    *
    * When the camera outputs the captured video frames, if the video frames are the same for 15
    * consecutive frames, the SDK triggers the `onLocalVideoStateChanged` callback with the state code
-   * of `LOCAL_VIDEO_STREAM_STATE_CAPTURING` and error code of `LOCAL_VIDEO_STREAM_ERROR_CAPTURE_FAILURE`.
+   * of `LOCAL_VIDEO_STREAM_STATE_CAPTURING` and error code of `LOCAL_VIDEO_STREAM_REASON_CAPTURE_FAILURE`.
    * Note that the video frame duplication detection is only available for video frames with a resolution
    * greater than 200 × 200, a frame rate greater than or equal to 10 fps, and a bitrate less than 20 Kbps.
    *
@@ -1808,12 +1819,12 @@ class IRtcEngineEventHandler {
    *
    * @param source The video source type: #VIDEO_SOURCE_TYPE.
    * @param state The state of the local video. See #LOCAL_VIDEO_STREAM_STATE.
-   * @param error The detailed error information. See #LOCAL_VIDEO_STREAM_ERROR.
+   * @param reason The detailed error information. See #LOCAL_VIDEO_STREAM_REASON.
    */
-  virtual void onLocalVideoStateChanged(VIDEO_SOURCE_TYPE source, LOCAL_VIDEO_STREAM_STATE state, LOCAL_VIDEO_STREAM_ERROR error) {
+  virtual void onLocalVideoStateChanged(VIDEO_SOURCE_TYPE source, LOCAL_VIDEO_STREAM_STATE state, LOCAL_VIDEO_STREAM_REASON reason) {
     (void)source;
     (void)state;
-    (void)error;
+    (void)reason;
   }
 
   /**
@@ -1836,13 +1847,13 @@ class IRtcEngineEventHandler {
 
   /** Occurs when the renderer receives the first frame of the remote video.
    *
-   * @param userId The user ID of the remote user sending the video stream.
+   * @param uid The user ID of the remote user sending the video stream.
    * @param width The width (px) of the video frame.
    * @param height The height (px) of the video stream.
    * @param elapsed The time elapsed (ms) from the local user calling `joinChannel` until the SDK triggers this callback.
    */
-  virtual void onFirstRemoteVideoFrame(uid_t userId, int width, int height, int elapsed) {
-    (void)userId;
+  virtual void onFirstRemoteVideoFrame(uid_t uid, int width, int height, int elapsed) {
+    (void)uid;
     (void)width;
     (void)height;
     (void)elapsed;
@@ -1922,8 +1933,8 @@ class IRtcEngineEventHandler {
    - true: The remote user has paused sending the video stream.
    - false: The remote user has resumed sending the video stream.
    */
-  virtual void onUserMuteVideo(uid_t userId, bool muted) {
-    (void)userId;
+  virtual void onUserMuteVideo(uid_t uid, bool muted) {
+    (void)uid;
     (void)muted;
   }
 
@@ -1945,11 +1956,11 @@ class IRtcEngineEventHandler {
   }
 
   /**
-   * Occurs when the remote user state is updated.
+   * Occurs when the remote user audio or video state is updated.
    * @param uid The uid of the remote user.
-   * @param state The remote user state: #REMOTE_USER_STATE.
+   * @param state The remote user's audio or video state: #REMOTE_USER_STATE.
    */
-  virtual void onUserStateChanged(uid_t uid, uint32_t state) {
+  virtual void onUserStateChanged(uid_t uid, REMOTE_USER_STATE state) {
     (void)uid;
     (void)state;
   }
@@ -1969,17 +1980,6 @@ class IRtcEngineEventHandler {
     (void)enabled;
   }
 
-  /** Reports the statistics of the local audio stream.
-   *
-   * The SDK triggers this callback once every two seconds.
-   *
-   * @param stats The statistics of the local audio stream.
-   * See LocalAudioStats.
-   */
-  virtual void onLocalAudioStats(const LocalAudioStats& stats) {
-    (void)stats;
-  }
-
   /** Reports the statistics of the audio stream from each remote user/host.
 
    The SDK triggers this callback once every two seconds for each remote user who is sending audio
@@ -1991,6 +1991,17 @@ class IRtcEngineEventHandler {
     (void)stats;
   }
 
+  /** Reports the statistics of the local audio stream.
+   *
+   * The SDK triggers this callback once every two seconds.
+   *
+   * @param stats The statistics of the local audio stream.
+   * See LocalAudioStats.
+   */
+  virtual void onLocalAudioStats(const LocalAudioStats& stats) {
+    (void)stats;
+  }
+
   /** Reports the statistics of the local video stream.
    *
    * The SDK triggers this callback once every two seconds for each
@@ -2020,12 +2031,14 @@ class IRtcEngineEventHandler {
   virtual void onRemoteVideoStats(const RemoteVideoStats& stats) {
     (void)stats;
   }
+
   /**
    * Occurs when the camera turns on and is ready to capture the video.
    * @deprecated Use `LOCAL_VIDEO_STREAM_STATE_CAPTURING(1)` in onLocalVideoStateChanged instead.
    * This callback indicates that the camera has been successfully turned on and you can start to capture video.
    */
   virtual void onCameraReady() __deprecated {}
+
   /**
    * Occurs when the camera focus area changes.
    *
@@ -2124,11 +2137,11 @@ class IRtcEngineEventHandler {
    callback.
 
    @param state The state code. See #RHYTHM_PLAYER_STATE_TYPE.
-   @param errorCode The error code. See #RHYTHM_PLAYER_ERROR_TYPE.
+   @param reason The error code. See #RHYTHM_PLAYER_REASON.
    */
-  virtual void onRhythmPlayerStateChanged(RHYTHM_PLAYER_STATE_TYPE state, RHYTHM_PLAYER_ERROR_TYPE errorCode) {
+  virtual void onRhythmPlayerStateChanged(RHYTHM_PLAYER_STATE_TYPE state, RHYTHM_PLAYER_REASON reason) {
     (void)state;
-    (void)errorCode;
+    (void)reason;
   }
 
   /**
@@ -2164,14 +2177,14 @@ class IRtcEngineEventHandler {
    * The SDK triggers this callback when the user receives the data stream that another user sends
    * by calling the \ref agora::rtc::IRtcEngine::sendStreamMessage "sendStreamMessage" method.
    *
-   * @param userId ID of the user who sends the data stream.
+   * @param uid ID of the user who sends the data stream.
    * @param streamId The ID of the stream data.
    * @param data The data stream.
    * @param length The length (byte) of the data stream.
    * @param sentTs The time when the data stream sent.
    */
-  virtual void onStreamMessage(uid_t userId, int streamId, const char* data, size_t length, uint64_t sentTs) {
-    (void)userId;
+  virtual void onStreamMessage(uid_t uid, int streamId, const char* data, size_t length, uint64_t sentTs) {
+    (void)uid;
     (void)streamId;
     (void)data;
     (void)length;
@@ -2183,15 +2196,15 @@ class IRtcEngineEventHandler {
    * The SDK triggers this callback when the user fails to receive the data stream that another user sends
    * by calling the \ref agora::rtc::IRtcEngine::sendStreamMessage "sendStreamMessage" method.
    *
-   * @param userId ID of the user who sends the data stream.
+   * @param uid ID of the user who sends the data stream.
    * @param streamId The ID of the stream data.
    * @param code The error code.
    * @param missed The number of lost messages.
    * @param cached The number of incoming cached messages when the data stream is
    * interrupted.
    */
-  virtual void onStreamMessageError(uid_t userId, int streamId, int code, int missed, int cached) {
-    (void)userId;
+  virtual void onStreamMessageError(uid_t uid, int streamId, int code, int missed, int cached) {
+    (void)uid;
     (void)streamId;
     (void)code;
     (void)missed;
@@ -2247,18 +2260,6 @@ class IRtcEngineEventHandler {
     (void)elapsed;
   }
 
-  /** Occurs when the SDK receives the first audio frame from a specific remote user.
-   * @deprecated Use `onRemoteAudioStateChanged` instead.
-   *
-   * @param uid ID of the remote user.
-   * @param elapsed The time elapsed (ms) from the loca user calling `joinChannel`
-   * until this callback is triggered.
-   */
-  virtual void onFirstRemoteAudioFrame(uid_t uid, int elapsed) __deprecated {
-    (void)uid;
-    (void)elapsed;
-  }
-
   /**
    * Occurs when the SDK decodes the first remote audio frame for playback.
    *
@@ -2280,6 +2281,18 @@ class IRtcEngineEventHandler {
     (void)elapsed;
   }
 
+  /** Occurs when the SDK receives the first audio frame from a specific remote user.
+   * @deprecated Use `onRemoteAudioStateChanged` instead.
+   *
+   * @param uid ID of the remote user.
+   * @param elapsed The time elapsed (ms) from the loca user calling `joinChannel`
+   * until this callback is triggered.
+   */
+  virtual void onFirstRemoteAudioFrame(uid_t uid, int elapsed) __deprecated {
+    (void)uid;
+    (void)elapsed;
+  }
+
   /** Occurs when the local audio state changes.
    *
    * When the state of the local audio stream changes (including the state of the audio capture and encoding), the SDK
@@ -2291,12 +2304,12 @@ class IRtcEngineEventHandler {
    * parameter for details.
    *
    * @param state State of the local audio. See #LOCAL_AUDIO_STREAM_STATE.
-   * @param error The error information of the local audio.
-   * See #LOCAL_AUDIO_STREAM_ERROR.
+   * @param reason The reason information of the local audio.
+   * See #LOCAL_AUDIO_STREAM_REASON.
    */
-  virtual void onLocalAudioStateChanged(LOCAL_AUDIO_STREAM_STATE state, LOCAL_AUDIO_STREAM_ERROR error) {
+  virtual void onLocalAudioStateChanged(LOCAL_AUDIO_STREAM_STATE state, LOCAL_AUDIO_STREAM_REASON reason) {
     (void)state;
-    (void)error;
+    (void)reason;
   }
 
   /** Occurs when the remote audio state changes.
@@ -2335,12 +2348,16 @@ class IRtcEngineEventHandler {
    *
    * @param userId The ID of the active speaker. A `uid` of 0 means the local user.
    */
-  virtual void onActiveSpeaker(uid_t userId) { (void)userId; }
+  virtual void onActiveSpeaker(uid_t uid) { 
+    (void)uid;
+  }
+
   /** Reports result of content inspection.
    *
    * @param result The result of content inspection: #CONTENT_INSPECT_RESULT.
    */
   virtual void onContentInspectResult(media::CONTENT_INSPECT_RESULT result) { (void)result; }
+
   /** Reports the result of taking a video snapshot.
    *
    * After a successful `takeSnapshot` method call, the SDK triggers this callback to report whether the snapshot is
@@ -2365,6 +2382,7 @@ class IRtcEngineEventHandler {
     (void)height;
     (void)errCode;
   }
+
   /**
    * Occurs when the user role switches in the interactive live streaming.
    *
@@ -2377,6 +2395,7 @@ class IRtcEngineEventHandler {
     (void)newRole;
     (void)newRoleOptions;
   }
+
   /**
    * Occurs when the user role in a Live-Broadcast channel fails to switch, for example, from a broadcaster
    * to an audience or vice versa.
@@ -2388,6 +2407,7 @@ class IRtcEngineEventHandler {
     (void)reason;
     (void)currentRole;
   }
+
   /** Occurs when the audio device volume changes.
    @param deviceType The device type, see #MEDIA_DEVICE_TYPE
    @param volume The volume of the audio device.
@@ -2410,13 +2430,13 @@ class IRtcEngineEventHandler {
    *
    * @param url The URL address where the state of the media push changes.
    * @param state The current state of the media push: #RTMP_STREAM_PUBLISH_STATE.
-   * @param errCode The detailed error information for the media push: #RTMP_STREAM_PUBLISH_ERROR_TYPE.
+   * @param reason The detailed error information for the media push: #RTMP_STREAM_PUBLISH_REASON.
    */
   virtual void onRtmpStreamingStateChanged(const char* url, RTMP_STREAM_PUBLISH_STATE state,
-                                           RTMP_STREAM_PUBLISH_ERROR_TYPE errCode) {
+                                           RTMP_STREAM_PUBLISH_REASON reason) {
     (void)url;
     (void)state;
-    (void)errCode;
+    (void)reason;
   }
 
   /** Reports events during the media push.
@@ -2456,7 +2476,6 @@ class IRtcEngineEventHandler {
    */
   virtual void onAudioRoutingChanged(int routing) { (void)routing; }
 
-
   /**
    * Occurs when the state of the media stream relay changes.
    *
@@ -2493,32 +2512,6 @@ class IRtcEngineEventHandler {
     (void)code;
   }
 
-  /**
-   * Reports events during the media stream relay.
-   * @deprecated v4.2.0. This callback is not recommended and will be removed in future releases.
-   * @param code The event code for media stream relay:
-   * - `RELAY_EVENT_NETWORK_DISCONNECTED(0)`: The user disconnects from the server due to poor
-   * network connections.
-   * - `RELAY_EVENT_NETWORK_CONNECTED(1)`: The network reconnects.
-   * - `RELAY_EVENT_PACKET_JOINED_SRC_CHANNEL(2)`: The user joins the source channel.
-   * - `RELAY_EVENT_PACKET_JOINED_DEST_CHANNEL(3)`: The user joins the destination channel.
-   * - `RELAY_EVENT_PACKET_SENT_TO_DEST_CHANNEL(4)`: The SDK starts relaying the media stream to the
-   * destination channel.
-   * - `RELAY_EVENT_PACKET_RECEIVED_VIDEO_FROM_SRC(5)`: The server receives the video stream from
-   * the source channel.
-   * - `RELAY_EVENT_PACKET_RECEIVED_AUDIO_FROM_SRC(6)`: The server receives the audio stream from
-   * the source channel.
-   * - `RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL(7)`: The destination channel is updated.
-   * - `RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL_REFUSED(8)`: The destination channel update fails due
-   * to internal reasons. Deprecated from 4.1.0
-   * - `RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL_NOT_CHANGE(9)`: The destination channel does not
-   * change, which means that the destination channel fails to be updated.
-   * - `RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL_IS_NULL(10)`: The destination channel name is NULL.
-   * - `RELAY_EVENT_VIDEO_PROFILE_UPDATE(11)`: The video profile is sent to the server.
-   */
-  virtual void onChannelMediaRelayEvent(int code) __deprecated {
-    (void)code;
-  }
   /**
    * Occurs when the published media stream falls back to an audio-only stream due to poor network conditions or
    * switches back to video stream after the network conditions improve.
@@ -2535,6 +2528,7 @@ class IRtcEngineEventHandler {
   virtual void onLocalPublishFallbackToAudioOnly(bool isFallbackOrRecover) {
     (void)isFallbackOrRecover;
   }
+
   /**
    * Occurs when the remote media stream falls back to audio-only stream due to poor network conditions or
    * switches back to video stream after the network conditions improve.
@@ -2571,8 +2565,7 @@ class IRtcEngineEventHandler {
   @param rxKBitRate Received bitrate (Kbps) of the audio packet sent from the
   remote user.
   */
-  virtual void onRemoteAudioTransportStats(uid_t uid, unsigned short delay, unsigned short lost,
-                                           unsigned short rxKBitRate) __deprecated {
+  virtual void onRemoteAudioTransportStats(uid_t uid, unsigned short delay, unsigned short lost, unsigned short rxKBitRate) __deprecated {
     (void)uid;
     (void)delay;
     (void)lost;
@@ -2596,8 +2589,7 @@ class IRtcEngineEventHandler {
   @param rxKBitRate The bitrate (Kbps) of the video packet sent from
   the remote user.
   */
-  virtual void onRemoteVideoTransportStats(uid_t uid, unsigned short delay, unsigned short lost,
-                                           unsigned short rxKBitRate) __deprecated {
+  virtual void onRemoteVideoTransportStats(uid_t uid, unsigned short delay, unsigned short lost, unsigned short rxKBitRate) __deprecated {
     (void)uid;
     (void)delay;
     (void)lost;
@@ -2635,7 +2627,7 @@ class IRtcEngineEventHandler {
    * @param currentStats Instantaneous value of optimization effect.
    * @param averageStats Average value of cumulative optimization effect.
    */
-  virtual void onWlAccStats(WlAccStats currentStats, WlAccStats averageStats) {
+  virtual void onWlAccStats(const WlAccStats& currentStats, const WlAccStats& averageStats) {
     (void)currentStats;
     (void)averageStats;
   }
@@ -2703,6 +2695,42 @@ class IRtcEngineEventHandler {
     (void)uid;
     (void)info;
   }
+
+  /**
+   * Occurs when the user account is updated.
+   *
+   * @param uid The user ID.
+   * @param userAccount The user account.
+   */
+  virtual void onUserAccountUpdated(uid_t uid, const char* userAccount){
+    (void)uid;
+    (void)userAccount;
+  }
+
+  /**
+   * Reports the tracing result of video rendering event of the user.
+   * 
+   * @param uid The user ID.
+   * @param currentEvent The current event of the tracing result: #MEDIA_TRACE_EVENT.
+   * @param tracingInfo The tracing result: #VideoRenderingTracingInfo.
+   */
+  virtual void onVideoRenderingTracingResult(uid_t uid, MEDIA_TRACE_EVENT currentEvent, VideoRenderingTracingInfo tracingInfo) {
+    (void)uid;
+    (void)currentEvent;
+    (void)tracingInfo;
+  }
+
+  /**
+   * Occurs when local video transcoder stream has an error.
+   *
+   * @param stream Stream type of TranscodingVideoStream.
+   * @param error Error code of VIDEO_TRANSCODER_ERROR.
+   */
+  virtual void onLocalVideoTranscoderError(const TranscodingVideoStream& stream, VIDEO_TRANSCODER_ERROR error){
+    (void)stream;
+    (void)error;
+  }
+
   /**
    * Reports the user log upload result
    * @param requestId RequestId of the upload
@@ -2780,6 +2808,24 @@ class IRtcEngineEventHandler {
     (void)newState;
     (void)elapseSinceLastState;
   }
+
+  /**
+   * Occurs when receive a video transcoder stream which has video layout info.
+   *
+   * @param uid user id of the transcoded stream.
+   * @param width width of the transcoded stream.
+   * @param height height of the transcoded stream.
+   * @param layoutCount count of layout info in the transcoded stream.
+   * @param layoutlist video layout info list of the transcoded stream.
+   */
+  virtual void onTranscodedStreamLayoutInfo(uid_t uid, int width, int height, int layoutCount,const VideoLayout* layoutlist) {
+    (void)uid;
+    (void)width;
+    (void)height;
+    (void)layoutCount;
+    (void)layoutlist;
+  }
+
   /**
    * The event callback of the extension.
    *
@@ -2796,6 +2842,7 @@ class IRtcEngineEventHandler {
     (void)key;
     (void)value;
   }
+
   /**
    * Occurs when the extension is enabled.
    *
@@ -2808,6 +2855,7 @@ class IRtcEngineEventHandler {
     (void)provider;
     (void)extension;
   }
+
   /**
    * Occurs when the extension is disabled.
    *
@@ -2820,6 +2868,7 @@ class IRtcEngineEventHandler {
     (void)provider;
     (void)extension;
   }
+
   /**
    * Occurs when the extension runs incorrectly.
    *
@@ -2837,39 +2886,15 @@ class IRtcEngineEventHandler {
     (void)error;
     (void)message;
   }
-  /**
-   * Occurs when the user account is updated.
-   *
-   * @param uid The user ID.
-   * @param userAccount The user account.
-   */
-  virtual void onUserAccountUpdated(uid_t uid, const char* userAccount){
-    (void)uid;
-    (void)userAccount;
-  }
- 
-  /**
-   * Occurs when local video transcoder stream has an error.
-   *
-   * @param stream Stream type of TranscodingVideoStream.
-   * @param error Error code of VIDEO_TRANSCODER_ERROR.
-   */
-  virtual void onLocalVideoTranscoderError(const TranscodingVideoStream& stream, VIDEO_TRANSCODER_ERROR error){
-    (void)stream;
-    (void)error;
-  }
 
   /**
-   * Reports the tracing result of video rendering event of the user.
-   * 
-   * @param uid The user ID.
-   * @param currentEvent The current event of the tracing result: #MEDIA_TRACE_EVENT.
-   * @param tracingInfo The tracing result: #VideoRenderingTracingInfo.
+   * Occurs when the SDK receives RTM setting change response.
+   *
+   * @technical preview
+   * @param code The error code.
    */
-  virtual void onVideoRenderingTracingResult(uid_t uid, MEDIA_TRACE_EVENT currentEvent, VideoRenderingTracingInfo tracingInfo) {
-    (void)uid;
-    (void)currentEvent;
-    (void)tracingInfo;
+  virtual void onSetRtmFlagResult(int code) {
+    (void)code;
   }
 };
 
@@ -3027,8 +3052,6 @@ class IVideoDeviceManager {
   virtual void release() = 0;
 };
 
-
-class IRtcEngineEventHandlerEx;
 /**
  * The context of IRtcEngine.
  */
@@ -3124,11 +3147,8 @@ struct RtcEngineContext {
   bool autoRegisterAgoraExtensions;
 
   RtcEngineContext()
-      : eventHandler(NULL), appId(NULL), context(NULL),
-        channelProfile(CHANNEL_PROFILE_LIVE_BROADCASTING),
-        license(NULL),
-        audioScenario(AUDIO_SCENARIO_DEFAULT),
-        areaCode(AREA_CODE_GLOB),
+      : eventHandler(NULL), appId(NULL), context(NULL), channelProfile(CHANNEL_PROFILE_LIVE_BROADCASTING),
+        license(NULL), audioScenario(AUDIO_SCENARIO_DEFAULT), areaCode(AREA_CODE_GLOB),
         logConfig(), useExternalEglContext(false), domainLimit(false), autoRegisterAgoraExtensions(true) {}
 };
 
@@ -3136,6 +3156,8 @@ struct RtcEngineContext {
 */
 class IMetadataObserver {
 public:
+    virtual ~IMetadataObserver() {}
+
     /** The metadata type.
      *
      * @note We only support video metadata for now.
@@ -3163,25 +3185,25 @@ class IMetadataObserver {
      */
     struct Metadata
     {
-        /** The User ID that sent the metadata.
-         * - For the receiver: The user ID of the user who sent the `metadata`.
-         * - For the sender: Ignore this value.
-         */
-        unsigned int uid;
-        /** The buffer size of the sent or received `metadata`.
-         */
-        unsigned int size;
-        /** The buffer address of the sent or received `metadata`.
-         */
-        unsigned char *buffer;
-        /** The timestamp (ms) of the `metadata`.
-         *
-         */
-        long long timeStampMs;
+      /** The User ID that sent the metadata.
+        * - For the receiver: The user ID of the user who sent the `metadata`.
+        * - For the sender: Ignore this value.
+        */
+      unsigned int uid;
+      /** The buffer size of the sent or received `metadata`.
+        */
+      unsigned int size;
+      /** The buffer address of the sent or received `metadata`.
+        */
+      unsigned char* buffer;
+      /** The timestamp (ms) of the `metadata`.
+        *
+        */
+      long long timeStampMs;
+
+      Metadata() : uid(0), size(0), buffer(NULL), timeStampMs(0) {}
     };
 
-    virtual ~IMetadataObserver() {}
-
    /** Occurs when the SDK requests the maximum size of the metadata.
     *
     *
@@ -3213,24 +3235,24 @@ class IMetadataObserver {
      * @note If the receiver is audience, the receiver cannot get the NTP timestamp (ms)
      * that the metadata sends.
      */
-    virtual void onMetadataReceived(const Metadata &metadata) = 0;
+    virtual void onMetadataReceived(const Metadata& metadata) = 0;
 };
 
-// The error codes for media streaming
+// The reason codes for media streaming
 // GENERATED_JAVA_ENUM_PACKAGE: io.agora.streaming
-enum DIRECT_CDN_STREAMING_ERROR {
+enum DIRECT_CDN_STREAMING_REASON {
   // No error occurs.
-  DIRECT_CDN_STREAMING_ERROR_OK = 0,
+  DIRECT_CDN_STREAMING_REASON_OK = 0,
   // A general error occurs (no specified reason).
-  DIRECT_CDN_STREAMING_ERROR_FAILED = 1,
+  DIRECT_CDN_STREAMING_REASON_FAILED = 1,
   // Audio publication error.
-  DIRECT_CDN_STREAMING_ERROR_AUDIO_PUBLICATION = 2,
+  DIRECT_CDN_STREAMING_REASON_AUDIO_PUBLICATION = 2,
   // Video publication error.
-  DIRECT_CDN_STREAMING_ERROR_VIDEO_PUBLICATION = 3,
+  DIRECT_CDN_STREAMING_REASON_VIDEO_PUBLICATION = 3,
 
-  DIRECT_CDN_STREAMING_ERROR_NET_CONNECT = 4,
+  DIRECT_CDN_STREAMING_REASON_NET_CONNECT = 4,
   // Already exist stream name.
-  DIRECT_CDN_STREAMING_ERROR_BAD_NAME = 5,
+  DIRECT_CDN_STREAMING_REASON_BAD_NAME = 5,
 };
 
 // The connection state of media streaming
@@ -3289,12 +3311,12 @@ class IDirectCdnStreamingEventHandler {
   /**
    * Event callback of direct cdn streaming
    * @param state Current status
-   * @param error Error Code
+   * @param reason Reason Code
    * @param message Message
    */
-  virtual void onDirectCdnStreamingStateChanged(DIRECT_CDN_STREAMING_STATE state, DIRECT_CDN_STREAMING_ERROR error, const char* message)  {
+  virtual void onDirectCdnStreamingStateChanged(DIRECT_CDN_STREAMING_STATE state, DIRECT_CDN_STREAMING_REASON reason, const char* message)  {
     (void)state;
-    (void)error;
+    (void)reason;
     (void)message;
   };
 
@@ -3435,11 +3457,7 @@ struct ExtensionInfo {
    */
   uid_t localUid;
 
-  ExtensionInfo()
-      : mediaSourceType(agora::media::UNKNOWN_MEDIA_SOURCE),
-        remoteUid(0),
-        channelId(NULL),
-        localUid(0) {}
+  ExtensionInfo() : mediaSourceType(agora::media::UNKNOWN_MEDIA_SOURCE), remoteUid(0), channelId(NULL), localUid(0) {}
 };
 
 class IMediaPlayer;
@@ -3450,7 +3468,6 @@ class IMediaRecorder;
  *
  * `IRtcEngine` provides the main methods that your app can call.
  *
- * Before calling other APIs, you must call createAgoraRtcEngine to create an `IRtcEngine` object.
  */
 class IRtcEngine : public agora::base::IEngineBase {
  public:
@@ -3471,14 +3488,12 @@ class IRtcEngine : public agora::base::IEngineBase {
    * @param sync Determines whether this method is a synchronous call.
    * - `true`: This method is a synchronous call, which means that the result of this method call
    * returns after the IRtcEngine object resources are released. Do not call this method
-   * in any callback generated by the SDK, or it may result in a deadlock. The SDK automatically
-   * detects the deadlock and turns this method into an asynchronous call, but the test itself takes
-   * extra time.
+   * in any callback generated by the SDK, or it may result in a deadlock.
    * - `false`: This method is an asynchronous call. The result returns immediately even when the
    * IRtcEngine object resources are not released.
    *
    */
-  virtual void release(bool sync = false) = 0;
+  AGORA_CPP_API static void release(bool sync = false);
 
   /**
    * Initializes `IRtcEngine`.
@@ -3527,7 +3542,7 @@ class IRtcEngine : public agora::base::IEngineBase {
   /**
    * Queries the capacity of the current device codec.
    *
-   * @param codecInfo An array of the codec cap information: CodecCapInfo.
+   * @param codec_info An array of the codec cap information: CodecCapInfo.
    * @param size The array size.
    * @return 
    * 0: Success.
@@ -3535,6 +3550,17 @@ class IRtcEngine : public agora::base::IEngineBase {
    */
   virtual int queryCodecCapability(CodecCapInfo* codecInfo, int& size) = 0;
 
+    /**
+   * Queries the score of the current device.
+   *
+   * @return 
+   * > 0: If the value is greater than 0, it means that the device score has been retrieved and represents the score value.
+   * Most devices score between 60-100, with higher scores indicating better performance.
+   * 
+   * < 0: Failure.
+   */
+  virtual int queryDeviceScore() = 0;
+
   /**
    * Preload a channel.
    *
@@ -3542,8 +3568,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    *
    * A successful call of this method will reduce the time of joining the same channel.
    *
-   * @since v4.2.2
-   * @note
+   * Note:
    *  1. The SDK supports preloading up to 20 channels. Once the preloaded channels exceed the limit, the SDK will keep the latest 20 available.
    *  2. Renew the token of the preloaded channel by calling this method with the same 'channelId' and 'uid'.
    *
@@ -3582,8 +3607,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    *
    * A successful call of this method will reduce the time of joining the same channel.
    *
-   * @since v4.2.2
-   * @note
+   * Note:
    *  1. The SDK supports preloading up to 20 channels. Once the preloaded channels exceed the limit, the SDK will keep the latest 20 available.
    *  2. Renew the token of the preloaded channel by calling this method with the same 'channelId' and 'userAccount'.
    *
@@ -3615,15 +3639,13 @@ class IRtcEngine : public agora::base::IEngineBase {
    *   - -102: The channel name is invalid. You need to pass in a valid channel name in channelId to
    * preload the channel again.
    */
-  virtual int preloadChannel(const char* token, const char* channelId, const char* userAccount) = 0;
+  virtual int preloadChannelWithUserAccount(const char* token, const char* channelId, const char* userAccount) = 0;
 
   /**
    * Update token of the preloaded channels.
    *
    * An easy way to update all preloaded channels' tokens, if all preloaded channels use the same token.
    *
-   * @since v4.2.2
-   * @note
    * If preloaded channels use different tokens, we need to call the 'preloadChannel' method with the same 'channelId'
    * and 'uid' or 'userAccount' to update the corresponding token.
    *
@@ -3697,8 +3719,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * rejoin the channel.
    *   - -121: The user ID is invalid. You need to pass in a valid user ID in uid to rejoin the channel.
    */
-  virtual int joinChannel(const char* token, const char* channelId, const char* info,
-                          uid_t uid) = 0;
+  virtual int joinChannel(const char* token, const char* channelId, const char* info, uid_t uid) = 0;
 
   /**
    * Joins a channel with media options.
@@ -3767,8 +3788,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * rejoin the channel.
    *   - -121: The user ID is invalid. You need to pass in a valid user ID in uid to rejoin the channel.
    */
-  virtual int joinChannel(const char* token, const char* channelId, uid_t uid,
-                          const ChannelMediaOptions& options) = 0;
+  virtual int joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options) = 0;
 
   /**
    *  Updates the channel media options after joining the channel.
@@ -3947,7 +3967,7 @@ class IRtcEngine : public agora::base::IEngineBase {
 
   /** Starts a video call test.
    *
-   * @param config Configuration for video call test.
+   * @param config: configuration for video call test.
    *
    * @return
    * - 0: Success.
@@ -4287,6 +4307,26 @@ class IRtcEngine : public agora::base::IEngineBase {
    */
   virtual int setVideoScenario(VIDEO_APPLICATION_SCENARIO_TYPE scenarioType) = 0;
 
+    /**
+   * Sets the video qoe preference.
+   *
+   * @since v4.2.1
+   *
+   * You can call this method to set the expected QoE Preference.
+   * The SDK will optimize the video experience for each preference you set.
+   *
+   *
+   * @param qoePreference The qoe preference type. See #VIDEO_QOE_PREFERENCE_TYPE.
+   *
+   * @return
+   * - 0: Success.
+   * - < 0: Failure.
+   * - ERR_FAILED (1): A general error occurs (no specified reason).
+   * - ERR_NOT_SUPPORTED (4): Unable to set video application scenario.
+   * - ERR_NOT_INITIALIZED (7): The SDK is not initialized.
+   */
+  virtual int setVideoQoEPreference(VIDEO_QOE_PREFERENCE_TYPE qoePreference) = 0;
+
   /**
    * Enables the audio.
    *
@@ -4314,7 +4354,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - < 0: Failure.
    */
   virtual int disableAudio() = 0;
-
+  
   /**
    * Sets the audio parameters and application scenarios.
    *
@@ -4337,7 +4377,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - < 0: Failure.
    */
   virtual int setAudioProfile(AUDIO_PROFILE_TYPE profile, AUDIO_SCENARIO_TYPE scenario) __deprecated = 0;
-  
+
   /**
    * Sets the audio profile.
    *
@@ -4601,6 +4641,17 @@ class IRtcEngine : public agora::base::IEngineBase {
    */
   virtual int setDefaultMuteAllRemoteVideoStreams(bool mute) __deprecated = 0;
 
+  /**
+   * Sets the default stream type of the remote video if the remote user has enabled dual-stream.
+   *
+   * @param streamType Sets the default video stream type: #VIDEO_STREAM_TYPE.
+   *
+   * @return
+   * - 0: Success.
+   * - < 0: Failure.
+   */
+  virtual int setRemoteDefaultVideoStreamType(VIDEO_STREAM_TYPE streamType) = 0;
+
   /**
    * Stops or resumes receiving the video stream of a specified user.
    *
@@ -4650,17 +4701,6 @@ class IRtcEngine : public agora::base::IEngineBase {
    */
   virtual int setRemoteVideoSubscriptionOptions(uid_t uid, const VideoSubscriptionOptions &options) = 0;
 
-  /**
-   * Sets the default stream type of the remote video if the remote user has enabled dual-stream.
-   *
-   * @param streamType Sets the default video stream type: #VIDEO_STREAM_TYPE.
-   *
-   * @return
-   * - 0: Success.
-   * - < 0: Failure.
-   */
-  virtual int setRemoteDefaultVideoStreamType(VIDEO_STREAM_TYPE streamType) = 0;
-
   /**
    * Sets the blocklist of subscribe remote stream audio.
    *
@@ -4840,8 +4880,8 @@ class IRtcEngine : public agora::base::IEngineBase {
   - < 0: Failure.
   */
   virtual int stopAudioRecording() = 0;
-  
-  /**
+
+    /**
    * Creates a media player source object and return its pointer. If full featured
    * media player source is supported, it will create it, or it will create a simple
    * media player.
@@ -4869,7 +4909,7 @@ class IRtcEngine : public agora::base::IEngineBase {
   /**
    * Creates a media recorder object and return its pointer.
    *
-   * @param info The RecorderStreamInfo object. It contains user ID and channel name of user.
+   * @param info The RecorderStreamInfo object. It contains the user ID and the channel name.
    * 
    * @return
    * - The pointer to \ref rtc::IMediaRecorder "IMediaRecorder",
@@ -5405,6 +5445,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    - < 0: Failure.
    */
   virtual int enableSoundPositionIndication(bool enabled) = 0;
+
   /** Sets the sound position and gain of a remote user.
 
    When the local user calls this method to set the sound position of a remote user, the sound difference between the left and right channels allows the local user to track the real-time position of the remote user, creating a real sense of space. This method applies to massively multiplayer online games, such as Battle Royale games.
@@ -5441,7 +5482,7 @@ class IRtcEngine : public agora::base::IEngineBase {
   /** Sets remote user parameters for spatial audio
 
    @param uid The ID of the remote user.
-   @param params Spatial audio parameters. see SpatialAudioParams.
+   @param param spatial audio parameters: SpatialAudioParams.
 
    @return int
    - 0: Success.
@@ -5737,8 +5778,7 @@ class IRtcEngine : public agora::base::IEngineBase {
   - 0: Success.
   - -1: Failure.
   */
-  virtual int setLocalVoiceEqualization(AUDIO_EQUALIZATION_BAND_FREQUENCY bandFrequency,
-                                        int bandGain) = 0;
+  virtual int setLocalVoiceEqualization(AUDIO_EQUALIZATION_BAND_FREQUENCY bandFrequency, int bandGain) = 0;
 
   /** Sets the local voice reverberation.
 
@@ -5761,6 +5801,7 @@ class IRtcEngine : public agora::base::IEngineBase {
     - -1(ERR_FAILED): A general error occurs (no specified reason).
   */
   virtual int setHeadphoneEQPreset(HEADPHONE_EQUALIZER_PRESET preset) = 0;
+
   /** Sets the parameters of audio playback effect for remote headphones after remote audio is mixed.
 
   @param lowGain The higher the parameter value, the deeper the sound. The value range is [-10,10].
@@ -5876,6 +5917,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - < 0: Failure.
    */
   virtual int setLocalRenderMode(media::base::RENDER_MODE_TYPE renderMode, VIDEO_MIRROR_MODE_TYPE mirrorMode) = 0;
+
   /**
    * Updates the display mode of the video view of a remote user.
    *
@@ -5936,8 +5978,6 @@ class IRtcEngine : public agora::base::IEngineBase {
   /**
    * Enables or disables the dual video stream mode.
    *
-   * @deprecated v4.2.0. This method is deprecated. Use setDualStreamMode instead.
-   *
    * If dual-stream mode is enabled, the subscriber can choose to receive the high-stream
    * (high-resolution high-bitrate video stream) or low-stream (low-resolution low-bitrate video stream)
    * video using \ref setRemoteVideoStreamType "setRemoteVideoStreamType".
@@ -5954,8 +5994,6 @@ class IRtcEngine : public agora::base::IEngineBase {
   /**
    * Enables or disables the dual video stream mode.
    *
-   * @deprecated v4.2.0. This method is deprecated. Use setDualStreamMode instead.
-   *
    * If dual-stream mode is enabled, the subscriber can choose to receive the high-stream
    * (high-resolution high-bitrate video stream) or low-stream (low-resolution low-bitrate video stream)
    * video using \ref setRemoteVideoStreamType "setRemoteVideoStreamType".
@@ -6000,8 +6038,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int setDualStreamMode(SIMULCAST_STREAM_MODE mode,
-                                 const SimulcastStreamConfig& streamConfig) = 0;
+  virtual int setDualStreamMode(SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig& streamConfig) = 0;
 
   /**
    * Sets the external audio track.
@@ -6230,7 +6267,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int adjustUserPlaybackSignalVolume(unsigned int uid, int volume) = 0;
+  virtual int adjustUserPlaybackSignalVolume(uid_t uid, int volume) = 0;
 
   /** Sets the fallback option for the published video stream based on the network conditions.
 
@@ -6287,6 +6324,59 @@ class IRtcEngine : public agora::base::IEngineBase {
    */
   virtual int setHighPriorityUserList(uid_t* uidList, int uidNum, STREAM_FALLBACK_OPTIONS option) = 0;
 
+  /**
+   * Enable/Disable an extension.
+   * By calling this function, you can dynamically enable/disable the extension without changing the pipeline.
+   * For example, enabling/disabling Extension_A means the data will be adapted/bypassed by Extension_A.
+   *
+   * NOTE: For compatibility reasons, if you haven't call registerExtension,
+   * enableExtension will automatically register the specified extension.
+   * We suggest you call registerExtension explicitly.
+   *
+   * @param provider The name of the extension provider, e.g. agora.io.
+   * @param extension The name of the extension, e.g. agora.beauty.
+   * @param extensionInfo The information for extension.
+   * @param enable Whether to enable the extension:
+   * - true: (Default) Enable the extension.
+   * - false: Disable the extension.
+   *
+   * @return
+   * - 0: Success.
+   * - < 0: Failure.
+   */
+  virtual int enableExtension(const char* provider, const char* extension, const ExtensionInfo& extensionInfo, bool enable = true) = 0;
+
+  /**
+   * Sets the properties of an extension.
+   *
+   * @param provider The name of the extension provider, e.g. agora.io.
+   * @param extension The name of the extension, e.g. agora.beauty.
+   * @param extensionInfo The information for extension.
+   * @param key The key of the extension.
+   * @param value The JSON formatted value of the extension key.
+   *
+   * @return
+   * - 0: Success.
+   * - < 0: Failure.
+   */
+  virtual int setExtensionProperty(const char* provider, const char* extension, const ExtensionInfo& extensionInfo, const char* key, const char* value) = 0;
+
+  /**
+   * Gets the properties of an extension.
+   *
+   * @param provider The name of the extension provider, e.g. agora.io.
+   * @param extension The name of the extension, e.g. agora.beauty.
+   * @param extensionInfo The information for extension.
+   * @param key The key of the extension.
+   * @param value The value of the extension key.
+   * @param buf_len Maximum length of the JSON string indicating the extension property.
+   *
+   * @return
+   * - 0: Success.
+   * - < 0: Failure.
+   */
+  virtual int getExtensionProperty(const char* provider, const char* extension, const ExtensionInfo& extensionInfo, const char* key, char* value, int buf_len)  = 0;
+
   /** Enables loopback recording.
    *
    * If you enable loopback recording, the output of the default sound card is mixed into
@@ -6370,8 +6460,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int setExtensionProviderProperty(
-      const char* provider, const char* key, const char* value) = 0;
+  virtual int setExtensionProviderProperty(const char* provider, const char* key, const char* value) = 0;
 
   /**
    * Registers an extension. Normally you should call this function immediately after engine initialization.
@@ -6385,8 +6474,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int registerExtension(const char* provider, const char* extension,
-                        agora::media::MEDIA_SOURCE_TYPE type = agora::media::UNKNOWN_MEDIA_SOURCE) = 0;
+  virtual int registerExtension(const char* provider, const char* extension, agora::media::MEDIA_SOURCE_TYPE type = agora::media::UNKNOWN_MEDIA_SOURCE) = 0;
 
   /**
    * Enable/Disable an extension.
@@ -6408,30 +6496,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int enableExtension(
-      const char* provider, const char* extension, bool enable=true, agora::media::MEDIA_SOURCE_TYPE type = agora::media::UNKNOWN_MEDIA_SOURCE) = 0;
-
-  /**
-   * Enable/Disable an extension.
-   * By calling this function, you can dynamically enable/disable the extension without changing the pipeline.
-   * For example, enabling/disabling Extension_A means the data will be adapted/bypassed by Extension_A.
-   *
-   * NOTE: For compatibility reasons, if you haven't call registerExtension,
-   * enableExtension will automatically register the specified extension.
-   * We suggest you call registerExtension explicitly.
-   *
-   * @param provider The name of the extension provider, e.g. agora.io.
-   * @param extension The name of the extension, e.g. agora.beauty.
-   * @param extensionInfo The information for extension.
-   * @param enable Whether to enable the extension:
-   * - true: (Default) Enable the extension.
-   * - false: Disable the extension.
-   *
-   * @return
-   * - 0: Success.
-   * - < 0: Failure.
-   */
-  virtual int enableExtension(const char* provider, const char* extension, const ExtensionInfo& extensionInfo, bool enable = true) = 0;
+  virtual int enableExtension(const char* provider, const char* extension, bool enable=true, agora::media::MEDIA_SOURCE_TYPE type = agora::media::UNKNOWN_MEDIA_SOURCE) = 0;
 
   /**
    * Sets the properties of an extension.
@@ -6466,37 +6531,6 @@ class IRtcEngine : public agora::base::IEngineBase {
       const char* provider, const char* extension,
       const char* key, char* value, int buf_len, agora::media::MEDIA_SOURCE_TYPE type = agora::media::UNKNOWN_MEDIA_SOURCE) = 0;
 
-  /**
-   * Sets the properties of an extension.
-   *
-   * @param provider The name of the extension provider, e.g. agora.io.
-   * @param extension The name of the extension, e.g. agora.beauty.
-   * @param extensionInfo The information for extension.
-   * @param key The key of the extension.
-   * @param value The JSON formatted value of the extension key.
-   *
-   * @return
-   * - 0: Success.
-   * - < 0: Failure.
-   */
-  virtual int setExtensionProperty(const char* provider, const char* extension, const ExtensionInfo& extensionInfo, const char* key, const char* value) = 0;
-
-  /**
-   * Gets the properties of an extension.
-   *
-   * @param provider The name of the extension provider, e.g. agora.io.
-   * @param extension The name of the extension, e.g. agora.beauty.
-   * @param extensionInfo The information for extension.
-   * @param key The key of the extension.
-   * @param value The value of the extension key.
-   * @param buf_len Maximum length of the JSON string indicating the extension property.
-   *
-   * @return
-   * - 0: Success.
-   * - < 0: Failure.
-   */
-  virtual int getExtensionProperty(const char* provider, const char* extension, const ExtensionInfo& extensionInfo, const char* key, char* value, int buf_len)  = 0;
-
   /** Sets the camera capture configuration.
    * @note Call this method before enabling the local camera.
    * That said, you can call this method before calling \ref IRtcEngine::joinChannel "joinChannel",
@@ -6510,7 +6544,6 @@ class IRtcEngine : public agora::base::IEngineBase {
    */
   virtual int setCameraCapturerConfiguration(const CameraCapturerConfiguration& config) = 0;
 
-
   /**
    * Get an custom video track id created by internal,which could used to publish or preview
    *
@@ -6549,9 +6582,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    */
   virtual int destroyCustomEncodedVideoTrack(video_track_id_t video_track_id) = 0;
 
-
 #if defined(__ANDROID__) || (defined(__APPLE__) && TARGET_OS_IOS)
-
   /**
    * Switches between front and rear cameras.
    *
@@ -6693,7 +6724,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    */
   virtual int setCameraExposurePosition(float positionXinView, float positionYinView) = 0;
 
- /**
+  /**
   * Returns whether exposure value adjusting is supported by the current device.
   * Exposure compensation is in auto exposure mode.
   * @since v4.2.2
@@ -6812,9 +6843,8 @@ class IRtcEngine : public agora::base::IEngineBase {
    */
   virtual bool isSpeakerphoneEnabled() = 0;
 
-  /** Select preferred route for android communication mode
+    /** Select preferred route for android communication mode
 
-   @since v4.2.2
    @param route The preferred route. For example, when a Bluetooth headset is connected,
    you can use this API to switch the route to a wired headset.
    @return meanless, route switch result is pass through CallbackOnRoutingChanged
@@ -6892,7 +6922,6 @@ class IRtcEngine : public agora::base::IEngineBase {
 #endif  // __APPLE__ && TARGET_OS_MAC && !TARGET_OS_IPHONE
 
 #if defined(_WIN32)
-
   /**
    * Shares the whole or part of a screen by specifying the screen rect.
    *
@@ -6919,8 +6948,7 @@ class IRtcEngine : public agora::base::IEngineBase {
   virtual int startScreenCaptureByScreenRect(const Rectangle& screenRect,
                                              const Rectangle& regionRect,
                                              const ScreenCaptureParameters& captureParams) __deprecated = 0;
-
-#endif  // _WIN32
+#endif
 
 #if defined(__ANDROID__)
   /**
@@ -7104,8 +7132,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int rate(const char* callId, int rating,
-                   const char* description) = 0;  // 0~10
+  virtual int rate(const char* callId, int rating, const char* description) = 0;  // 0~10
 
   /**
    * Allows a user to complain about the call quality.
@@ -7177,6 +7204,10 @@ class IRtcEngine : public agora::base::IEngineBase {
     * - < 0: Failure.
     */
   virtual int updateRtmpTranscoding(const LiveTranscoding& transcoding) = 0;
+
+  virtual int startLocalVideoTranscoder(const LocalTranscoderConfiguration& config) = 0;
+  virtual int updateLocalTranscoderConfiguration(const LocalTranscoderConfiguration& config) = 0;
+
   /** Stop an RTMP stream with transcoding or without transcoding from the CDN. (CDN live only.)
 
     * This method removes the RTMP URL address (added by the \ref IRtcEngine::startRtmpStreamWithoutTranscoding "startRtmpStreamWithoutTranscoding" method
@@ -7197,9 +7228,6 @@ class IRtcEngine : public agora::base::IEngineBase {
     */
   virtual int stopRtmpStream(const char* url) = 0;
 
-
-  virtual int startLocalVideoTranscoder(const LocalTranscoderConfiguration& config) = 0;
-  virtual int updateLocalTranscoderConfiguration(const LocalTranscoderConfiguration& config) = 0;
   virtual int stopLocalVideoTranscoder() = 0;
   /**
    * Starts video capture with a camera.
@@ -7402,7 +7430,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - Returns 0: Success.
    * - < 0: Failure.
    */
-  virtual int createDataStream(int* streamId, DataStreamConfig& config) = 0;
+  virtual int createDataStream(int* streamId, const DataStreamConfig& config) = 0;
 
   /** Sends a data stream.
    *
@@ -7457,7 +7485,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    - 0: Success.
    - < 0: Failure.
    */
-  virtual int addVideoWatermark(const RtcImage& watermark) = 0;
+  virtual int addVideoWatermark(const RtcImage& watermark) __deprecated = 0;
 
   /** Adds a watermark image to the local video.
 
@@ -7544,8 +7572,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * To try out this function, contact [support@agora.io](mailto:support@agora.io)
    * and discuss the format of customized messages with us.
    */
-  virtual int sendCustomReportMessage(
-      const char* id, const char* category, const char* event, const char* label, int value) = 0;
+  virtual int sendCustomReportMessage(const char* id, const char* category, const char* event, const char* label, int value) = 0;
 
   /** Registers the metadata observer.
 
@@ -7588,13 +7615,12 @@ class IRtcEngine : public agora::base::IEngineBase {
                          "pre_play_proc", "at_playout", "atw_playout" for audio receiving.
 
    */
+  virtual int startAudioFrameDump(const char* channel_id, uid_t uid, const char* location, const char* uuid, const char* passwd, long duration_ms, bool auto_upload) = 0;
 
-  virtual int startAudioFrameDump(const char* channel_id, uid_t user_id, const char* location,
-      const char* uuid, const char* passwd, long duration_ms, bool auto_upload) = 0;
   /**
    * Stops the audio frame dump.
    */
-  virtual int stopAudioFrameDump(const char* channel_id, uid_t user_id, const char* location) = 0;
+  virtual int stopAudioFrameDump(const char* channel_id, uid_t uid, const char* location) = 0;
 
  /**
    * Enables/Disables Agora AI Noise Suppression(AINS) with preset mode.
@@ -7676,8 +7702,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int joinChannelWithUserAccount(const char* token, const char* channelId,
-                                         const char* userAccount) = 0;
+  virtual int joinChannelWithUserAccount(const char* token, const char* channelId, const char* userAccount) = 0;
 
   /** Joins the channel with a user account.
    *
@@ -7710,8 +7735,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - 0: Success.
    * - < 0: Failure.
    */
-  virtual int joinChannelWithUserAccount(const char* token, const char* channelId,
-                                          const char* userAccount, const ChannelMediaOptions& options) = 0;
+  virtual int joinChannelWithUserAccount(const char* token, const char* channelId, const char* userAccount, const ChannelMediaOptions& options) = 0;
 
   /** Joins the channel with a user account.
    *
@@ -7786,157 +7810,73 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - < 0: Failure.
    */
   virtual int getUserInfoByUid(uid_t uid, rtc::UserInfo* userInfo) = 0;
-    /** Starts relaying media streams across channels or updates the channels for media relay.
-     *
-     * After a successful method call, the SDK triggers the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
-     *  "onChannelMediaRelayStateChanged" and
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayEvent
-     * "onChannelMediaRelayEvent" callbacks, and these callbacks return the
-     * state and events of the media stream relay.
-     * - If the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
-     *  "onChannelMediaRelayStateChanged" callback returns
-     * #RELAY_STATE_RUNNING (2) and #RELAY_OK (0), and the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayEvent
-     * "onChannelMediaRelayEvent" callback returns
-     * #RELAY_EVENT_PACKET_SENT_TO_DEST_CHANNEL (4), the host starts
-     * sending data to the destination channel.
-     * - If the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
-     *  "onChannelMediaRelayStateChanged" callback returns
-     * #RELAY_STATE_FAILURE (3), an exception occurs during the media stream
-     * relay.
-     *
-     * @note
-     * - Call this method after the \ref joinChannel() "joinChannel" method.
-     * - This method takes effect only when you are a host in a
-     * `LIVE_BROADCASTING` channel.
-     * - Contact sales-us@agora.io before implementing this function.
-     * - We do not support string user accounts in this API.
-     *
-     * @since v4.2.0
-     * @param configuration The configuration of the media stream relay:
-     * ChannelMediaRelayConfiguration.
-     *
-     * @return
-     * - 0: Success.
-     * - < 0: Failure.
-     *   - -1(ERR_FAILED): A general error occurs (no specified reason).
-     *   - -2(ERR_INVALID_ARGUMENT): The argument is invalid.
-     *   - -5(ERR_REFUSED): The request is rejected.
-     *   - -8(ERR_INVALID_STATE): The current status is invalid, only allowed to be called when the role is the broadcaster.
-     */
-  virtual int startOrUpdateChannelMediaRelay(const ChannelMediaRelayConfiguration &configuration) = 0;
 
-    /** Starts to relay media streams across channels.
-     *
-     * After a successful method call, the SDK triggers the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
-     *  "onChannelMediaRelayStateChanged" and
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayEvent
-     * "onChannelMediaRelayEvent" callbacks, and these callbacks return the
-     * state and events of the media stream relay.
-     * - If the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
-     *  "onChannelMediaRelayStateChanged" callback returns
-     * #RELAY_STATE_RUNNING (2) and #RELAY_OK (0), and the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayEvent
-     * "onChannelMediaRelayEvent" callback returns
-     * #RELAY_EVENT_PACKET_SENT_TO_DEST_CHANNEL (4), the host starts
-     * sending data to the destination channel.
-     * - If the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
-     *  "onChannelMediaRelayStateChanged" callback returns
-     * #RELAY_STATE_FAILURE (3), an exception occurs during the media stream
-     * relay.
-     *
-     * @note
-     * - Call this method after the \ref joinChannel() "joinChannel" method.
-     * - This method takes effect only when you are a host in a
-     * `LIVE_BROADCASTING` channel.
-     * - After a successful method call, if you want to call this method
-     * again, ensure that you call the
-     * \ref stopChannelMediaRelay() "stopChannelMediaRelay" method to quit the
-     * current relay.
-     * - Contact sales-us@agora.io before implementing this function.
-     * - We do not support string user accounts in this API.
-     *
-     * @deprecated v4.2.0 Use `startOrUpdateChannelMediaRelay` instead.
-     * @param configuration The configuration of the media stream relay:
-     * ChannelMediaRelayConfiguration.
-     *
-     * @return
-     * - 0: Success.
-     * - < 0: Failure.
-     *   - -1(ERR_FAILED): A general error occurs (no specified reason).
-     *   - -2(ERR_INVALID_ARGUMENT): The argument is invalid.
-     *   - -5(ERR_REFUSED): The request is rejected.
-     *   - -8(ERR_INVALID_STATE): The current status is invalid, only allowed to be called when the role is the broadcaster.
-     */
-  virtual int startChannelMediaRelay(const ChannelMediaRelayConfiguration &configuration) __deprecated = 0;
-
-    /** Updates the channels for media stream relay. After a successful
-     * \ref startChannelMediaRelay() "startChannelMediaRelay" method call, if
-     * you want to relay the media stream to more channels, or leave the
-     * current relay channel, you can call the
-     * \ref updateChannelMediaRelay() "updateChannelMediaRelay" method.
-     *
-     * After a successful method call, the SDK triggers the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayEvent
-     *  "onChannelMediaRelayEvent" callback with the
-     * #RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL (7) state code.
-     *
-     * @note
-     * Call this method after the
-     * \ref startChannelMediaRelay() "startChannelMediaRelay" method to update
-     * the destination channel.
-     *
-     * @deprecated v4.2.0 Use `startOrUpdateChannelMediaRelay` instead.
-     * @param configuration The media stream relay configuration:
-     * ChannelMediaRelayConfiguration.
-     *
-     * @return
-     * - 0: Success.
-     * - < 0: Failure.
-     *   - -1(ERR_FAILED): A general error occurs (no specified reason).
-     *   - -2(ERR_INVALID_ARGUMENT): The argument is invalid.
-     *   - -5(ERR_REFUSED): The request is rejected.
-     *   - -7(ERR_NOT_INITIALIZED): cross channel media streams are not relayed.
-     */
-  virtual int updateChannelMediaRelay(const ChannelMediaRelayConfiguration &configuration) __deprecated = 0;
+  /** Starts relaying media streams across channels or updates the channels for media relay.
+    *
+    * After a successful method call, the SDK triggers the
+    * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
+    *  "onChannelMediaRelayStateChanged" callback, and this callback return the state of the media stream relay.
+    * - If the
+    * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
+    *  "onChannelMediaRelayStateChanged" callback returns
+    * #RELAY_STATE_RUNNING (2) and #RELAY_OK (0), the host starts sending data to the destination channel.
+    * - If the
+    * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
+    *  "onChannelMediaRelayStateChanged" callback returns
+    * #RELAY_STATE_FAILURE (3), an exception occurs during the media stream
+    * relay.
+    *
+    * @note
+    * - Call this method after the \ref joinChannel() "joinChannel" method.
+    * - This method takes effect only when you are a host in a
+    * `LIVE_BROADCASTING` channel.
+    * - Contact sales-us@agora.io before implementing this function.
+    * - We do not support string user accounts in this API.
+    *
+    * @since v4.2.0
+    * @param configuration The configuration of the media stream relay:
+    * ChannelMediaRelayConfiguration.
+    *
+    * @return
+    * - 0: Success.
+    * - < 0: Failure.
+    *   - -1(ERR_FAILED): A general error occurs (no specified reason).
+    *   - -2(ERR_INVALID_ARGUMENT): The argument is invalid.
+    *   - -5(ERR_REFUSED): The request is rejected.
+    *   - -8(ERR_INVALID_STATE): The current status is invalid, only allowed to be called when the role is the broadcaster.
+  **/
+  virtual int startOrUpdateChannelMediaRelay(const ChannelMediaRelayConfiguration &configuration) = 0;
 
-    /** Stops the media stream relay.
-     *
-     * Once the relay stops, the host quits all the destination
-     * channels.
-     *
-     * After a successful method call, the SDK triggers the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
-     *  "onChannelMediaRelayStateChanged" callback. If the callback returns
-     * #RELAY_STATE_IDLE (0) and #RELAY_OK (0), the host successfully
-     * stops the relay.
-     *
-     * @note
-     * If the method call fails, the SDK triggers the
-     * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
-     *  "onChannelMediaRelayStateChanged" callback with the
-     * #RELAY_ERROR_SERVER_NO_RESPONSE (2) or
-     * #RELAY_ERROR_SERVER_CONNECTION_LOST (8) state code. You can leave the
-     * channel by calling the \ref leaveChannel() "leaveChannel" method, and
-     * the media stream relay automatically stops.
-     *
-     * @return
-     * - 0: Success.
-     * - < 0: Failure.
-     *   - -1(ERR_FAILED): A general error occurs (no specified reason).
-     *   - -2(ERR_INVALID_ARGUMENT): The argument is invalid.
-     *   - -5(ERR_REFUSED): The request is rejected.
-     *   - -7(ERR_NOT_INITIALIZED): cross channel media streams are not relayed.
-     */
+  /** Stops the media stream relay.
+    *
+    * Once the relay stops, the host quits all the destination
+    * channels.
+    *
+    * After a successful method call, the SDK triggers the
+    * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
+    *  "onChannelMediaRelayStateChanged" callback. If the callback returns
+    * #RELAY_STATE_IDLE (0) and #RELAY_OK (0), the host successfully
+    * stops the relay.
+    *
+    * @note
+    * If the method call fails, the SDK triggers the
+    * \ref agora::rtc::IRtcEngineEventHandler::onChannelMediaRelayStateChanged
+    *  "onChannelMediaRelayStateChanged" callback with the
+    * #RELAY_ERROR_SERVER_NO_RESPONSE (2) or
+    * #RELAY_ERROR_SERVER_CONNECTION_LOST (8) state code. You can leave the
+    * channel by calling the \ref leaveChannel() "leaveChannel" method, and
+    * the media stream relay automatically stops.
+    *
+    * @return
+    * - 0: Success.
+    * - < 0: Failure.
+    *   - -1(ERR_FAILED): A general error occurs (no specified reason).
+    *   - -2(ERR_INVALID_ARGUMENT): The argument is invalid.
+    *   - -5(ERR_REFUSED): The request is rejected.
+    *   - -7(ERR_NOT_INITIALIZED): cross channel media streams are not relayed.
+    */
   virtual int stopChannelMediaRelay() = 0;
 
-
   /** pause the channels for media stream relay.
    * @return
    * - 0: Success.
@@ -8058,6 +7998,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - < 0: Failure.
    */
   virtual int configRhythmPlayer(const AgoraRhythmPlayerConfig& config) = 0;
+
   /**
    * Takes a snapshot of a video stream.
    *
@@ -8088,6 +8029,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    * - < 0 : Failure.
    */
   virtual int takeSnapshot(uid_t uid, const char* filePath)  = 0;
+
     /** Enables the content inspect.
     @param enabled Whether to enable content inspect:
     - `true`: Yes.
@@ -8167,7 +8109,7 @@ class IRtcEngine : public agora::base::IEngineBase {
    - 0: Success
    - < 0: Failure
    */
-  virtual int setAdvancedAudioOptions(AdvancedAudioOptions &options, int sourceType = 0) = 0;
+  virtual int setAdvancedAudioOptions(AdvancedAudioOptions& options, int sourceType = 0) = 0;
 
   /** Bind local user and a remote user as an audio&video sync group. The remote user is defined by cid and uid.
    *  There’s a usage limit that local user must be a video stream sender. On the receiver side, media streams from same sync group will be time-synced
@@ -8295,28 +8237,13 @@ class IRtcEngine : public agora::base::IEngineBase {
 
   /** 
    * @brief Whether the target feature is available for the device.
-   * @since v4.2.0
+   * @since v4.3.0
    * @param type The feature type. See FeatureType.
    * @return
    * - true: available.
    * - false: not available.
    */
   virtual bool isFeatureAvailableOnDevice(FeatureType type) = 0;
-
-};
-
-class AAudioDeviceManager : public agora::util::AutoPtr<IAudioDeviceManager> {
- public:
-  AAudioDeviceManager(IRtcEngine* engine) {
-    queryInterface(engine, AGORA_IID_AUDIO_DEVICE_MANAGER);
-  }
-};
-
-class AVideoDeviceManager : public agora::util::AutoPtr<IVideoDeviceManager> {
- public:
-  AVideoDeviceManager(IRtcEngine* engine) {
-    queryInterface(engine, AGORA_IID_VIDEO_DEVICE_MANAGER);
-  }
 };
 
 // The following types are either deprecated or not implmented yet.
@@ -8493,6 +8420,20 @@ enum VIDEO_PROFILE_TYPE {
   VIDEO_PROFILE_DEFAULT = VIDEO_PROFILE_LANDSCAPE_360P,
 };
 
+class AAudioDeviceManager : public agora::util::AutoPtr<IAudioDeviceManager> {
+ public:
+  AAudioDeviceManager(IRtcEngine* engine) {
+    queryInterface(engine, AGORA_IID_AUDIO_DEVICE_MANAGER);
+  }
+};
+
+class AVideoDeviceManager : public agora::util::AutoPtr<IVideoDeviceManager> {
+ public:
+  AVideoDeviceManager(IRtcEngine* engine) {
+    queryInterface(engine, AGORA_IID_VIDEO_DEVICE_MANAGER);
+  }
+};
+
 }  // namespace rtc
 }  // namespace agora
 
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRtcEngineEx.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRtcEngineEx.h
index 32690cffe..e9826d78f 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRtcEngineEx.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraRtcEngineEx.h
@@ -91,6 +91,7 @@ class IRtcEngineEventHandlerEx : public IRtcEngineEventHandler {
   using IRtcEngineEventHandler::onNetworkTypeChanged;
   using IRtcEngineEventHandler::onEncryptionError;
   using IRtcEngineEventHandler::onUploadLogResult;
+  using IRtcEngineEventHandler::onUserInfoUpdated;
   using IRtcEngineEventHandler::onUserAccountUpdated;
   using IRtcEngineEventHandler::onAudioSubscribeStateChanged;
   using IRtcEngineEventHandler::onVideoSubscribeStateChanged;
@@ -98,6 +99,8 @@ class IRtcEngineEventHandlerEx : public IRtcEngineEventHandler {
   using IRtcEngineEventHandler::onVideoPublishStateChanged;
   using IRtcEngineEventHandler::onSnapshotTaken;
   using IRtcEngineEventHandler::onVideoRenderingTracingResult;
+  using IRtcEngineEventHandler::onSetRtmFlagResult;
+  using IRtcEngineEventHandler::onTranscodedStreamLayoutInfo;
 
   virtual const char* eventHandlerType() const { return "event_handler_ex"; }
 
@@ -322,13 +325,13 @@ class IRtcEngineEventHandlerEx : public IRtcEngineEventHandler {
    * you to troubleshoot issues when exceptions occur.
    *
    * The SDK triggers the onLocalVideoStateChanged callback with the state code of `LOCAL_VIDEO_STREAM_STATE_FAILED`
-   * and error code of `LOCAL_VIDEO_STREAM_ERROR_CAPTURE_FAILURE` in the following situations:
+   * and error code of `LOCAL_VIDEO_STREAM_REASON_CAPTURE_FAILURE` in the following situations:
    * - The app switches to the background, and the system gets the camera resource.
    * - The camera starts normally, but does not output video for four consecutive seconds.
    *
    * When the camera outputs the captured video frames, if the video frames are the same for 15
    * consecutive frames, the SDK triggers the `onLocalVideoStateChanged` callback with the state code
-   * of `LOCAL_VIDEO_STREAM_STATE_CAPTURING` and error code of `LOCAL_VIDEO_STREAM_ERROR_CAPTURE_FAILURE`.
+   * of `LOCAL_VIDEO_STREAM_STATE_CAPTURING` and error code of `LOCAL_VIDEO_STREAM_REASON_CAPTURE_FAILURE`.
    * Note that the video frame duplication detection is only available for video frames with a resolution
    * greater than 200 × 200, a frame rate greater than or equal to 10 fps, and a bitrate less than 20 Kbps.
    *
@@ -338,14 +341,14 @@ class IRtcEngineEventHandlerEx : public IRtcEngineEventHandler {
    *
    * @param connection The RtcConnection object.
    * @param state The state of the local video. See #LOCAL_VIDEO_STREAM_STATE.
-   * @param error The detailed error information. See #LOCAL_VIDEO_STREAM_ERROR.
+   * @param reason The detailed error information. See #LOCAL_VIDEO_STREAM_REASON.
    */
   virtual void onLocalVideoStateChanged(const RtcConnection& connection,
                                         LOCAL_VIDEO_STREAM_STATE state,
-                                        LOCAL_VIDEO_STREAM_ERROR errorCode) {
+                                        LOCAL_VIDEO_STREAM_REASON reason) {
     (void)connection;
     (void)state;
-    (void)errorCode;
+    (void)reason;
   }
 
   /**
@@ -762,13 +765,13 @@ class IRtcEngineEventHandlerEx : public IRtcEngineEventHandler {
    *
    * @param connection The RtcConnection object.
    * @param state State of the local audio. See #LOCAL_AUDIO_STREAM_STATE.
-   * @param error The error information of the local audio.
-   * See #LOCAL_AUDIO_STREAM_ERROR.
+   * @param reason The reason information of the local audio.
+   * See #LOCAL_AUDIO_STREAM_REASON.
    */
-  virtual void onLocalAudioStateChanged(const RtcConnection& connection, LOCAL_AUDIO_STREAM_STATE state, LOCAL_AUDIO_STREAM_ERROR error) {
+  virtual void onLocalAudioStateChanged(const RtcConnection& connection, LOCAL_AUDIO_STREAM_STATE state, LOCAL_AUDIO_STREAM_REASON reason) {
     (void)connection;
     (void)state;
-    (void)error;
+    (void)reason;
   }
 
   /** Occurs when the remote audio state changes.
@@ -976,6 +979,7 @@ class IRtcEngineEventHandlerEx : public IRtcEngineEventHandler {
     (void)success;
     (void)reason;
   }
+
   /**
    * Occurs when the user account is updated.
    *
@@ -983,10 +987,10 @@ class IRtcEngineEventHandlerEx : public IRtcEngineEventHandler {
    * @param remoteUid The user ID.
    * @param userAccount The user account.
    */
-  virtual void onUserAccountUpdated(const RtcConnection& connection, uid_t remoteUid, const char* userAccount){
+  virtual void onUserAccountUpdated(const RtcConnection& connection, uid_t remoteUid, const char* remoteUserAccount){
     (void)connection;
     (void)remoteUid;
-    (void)userAccount;
+    (void)remoteUserAccount;
   }
 
   /** Reports the result of taking a video snapshot.
@@ -1027,6 +1031,34 @@ class IRtcEngineEventHandlerEx : public IRtcEngineEventHandler {
     (void)currentEvent;
     (void)tracingInfo;
   }
+
+  /**
+   * Occurs when receive use rtm response.
+   *
+   * @param connection The RtcConnection object.
+   * @param code The error code:
+   */
+  virtual void onSetRtmFlagResult(const RtcConnection& connection, int code) {
+    (void)connection;
+    (void)code;
+  }
+  /**
+   * Occurs when receive a video transcoder stream which has video layout info.
+   *
+   * @param connection The RtcConnection object.
+   * @param uid user id of the transcoded stream.
+   * @param width width of the transcoded stream.
+   * @param height height of the transcoded stream.
+   * @param layoutCount count of layout info in the transcoded stream.
+   * @param layoutlist video layout info list of the transcoded stream.
+   */
+  virtual void onTranscodedStreamLayoutInfo(const RtcConnection& connection, uid_t uid, int width, int height, int layoutCount,const VideoLayout* layoutlist) {
+    (void)uid;
+    (void)width;
+    (void)height;
+    (void)layoutCount;
+    (void)layoutlist;
+  }
 };
 
 class IRtcEngineEx : public IRtcEngine {
@@ -1488,7 +1520,7 @@ class IRtcEngineEx : public IRtcEngine {
      * - 0: Success.
      * - < 0: Failure.
      */    
-    virtual int adjustUserPlaybackSignalVolumeEx(unsigned int uid, int volume, const RtcConnection& connection) = 0;
+    virtual int adjustUserPlaybackSignalVolumeEx(uid_t uid, int volume, const RtcConnection& connection) = 0;
 
     /** Gets the current connection state of the SDK.
      @param connection The RtcConnection object.
@@ -1561,7 +1593,7 @@ class IRtcEngineEx : public IRtcEngine {
      * - Returns 0: Success.
      * - < 0: Failure.
      */
-    virtual int createDataStreamEx(int* streamId, DataStreamConfig& config, const RtcConnection& connection) = 0;
+    virtual int createDataStreamEx(int* streamId, const DataStreamConfig& config, const RtcConnection& connection) = 0;
     /** Sends a data stream.
      *
      * After calling \ref IRtcEngine::createDataStream "createDataStream", you can call
@@ -1729,35 +1761,6 @@ class IRtcEngineEx : public IRtcEngine {
      */
     virtual int startOrUpdateChannelMediaRelayEx(const ChannelMediaRelayConfiguration& configuration, const RtcConnection& connection) = 0;
   
-    /** Starts to relay media streams across channels.
-     *
-     * @deprecated v4.2.0 Use `startOrUpdateChannelMediaRelayEx` instead.
-     * @param configuration The configuration of the media stream relay:ChannelMediaRelayConfiguration.
-     * @param connection RtcConnection.
-     * @return
-     * - 0: Success.
-     * - < 0: Failure.
-     *   - -1(ERR_FAILED): A general error occurs (no specified reason).
-     *   - -2(ERR_INVALID_ARGUMENT): The argument is invalid.
-     *   - -5(ERR_REFUSED): The request is rejected.
-     *   - -8(ERR_INVALID_STATE): The current status is invalid, only allowed to be called when the role is the broadcaster.
-     */
-    virtual int startChannelMediaRelayEx(const ChannelMediaRelayConfiguration& configuration, const RtcConnection& connection) __deprecated = 0;
-  
-    /** Updates the channels for media stream relay
-     * @deprecated v4.2.0 Use `startOrUpdateChannelMediaRelayEx` instead.
-     * @param configuration The media stream relay configuration: ChannelMediaRelayConfiguration.
-     * @param connection RtcConnection.
-     * @return
-     * - 0: Success.
-     * - < 0: Failure.
-     *   - -1(ERR_FAILED): A general error occurs (no specified reason).
-     *   - -2(ERR_INVALID_ARGUMENT): The argument is invalid.
-     *   - -5(ERR_REFUSED): The request is rejected.
-     *   - -7(ERR_NOT_INITIALIZED): cross channel media streams are not relayed.
-     */
-    virtual int updateChannelMediaRelayEx(const ChannelMediaRelayConfiguration& configuration, const RtcConnection& connection) __deprecated = 0;
-  
     /** Stops the media stream relay.
      *
      * Once the relay stops, the host quits all the destination
@@ -1942,6 +1945,16 @@ class IRtcEngineEx : public IRtcEngine {
       - -7(ERR_NOT_INITIALIZED): The SDK is not initialized. Initialize the `IRtcEngine` instance before calling this method.
      */
     virtual int startMediaRenderingTracingEx(const RtcConnection& connection) = 0;
+
+    /** Provides the technical preview functionalities or special customizations by configuring the SDK with JSON options.
+    @since v4.3.0
+    @param connection The connection information. See RtcConnection.
+    @param parameters Pointer to the set parameters in a JSON string.
+    @return
+    - 0: Success.
+    - < 0: Failure.
+    */
+    virtual int setParametersEx(const RtcConnection& connection, const char* parameters) = 0;
 };
 
 }  // namespace rtc
diff --git a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraSpatialAudio.h b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraSpatialAudio.h
index 51b382575..f4a3ba6a3 100644
--- a/android/src/main/cpp/third_party/include/agora_rtc/IAgoraSpatialAudio.h
+++ b/android/src/main/cpp/third_party/include/agora_rtc/IAgoraSpatialAudio.h
@@ -4,8 +4,7 @@
 //  Copyright (c) 2019 Agora.io. All rights reserved.
 //
 
-#ifndef AGORA_SPATIAL_AUDIO_H
-#define AGORA_SPATIAL_AUDIO_H
+#pragma once
 
 #include <stdint.h>
 #include "AgoraBase.h"
@@ -22,7 +21,6 @@ struct RemoteVoicePositionInfo {
   float position[3];
   // The forward vector of remote voice, (x, y, z). When it's not set, the vector is forward to listner.
   float forward[3];
-  RemoteVoicePositionInfo() = default;
 };
 
 struct SpatialAudioZone {
@@ -44,7 +42,6 @@ struct SpatialAudioZone {
   float upLength;
   //the audio attenuation of zone
   float audioAttenuation;
-  SpatialAudioZone() = default;
 };
 
 /** The definition of LocalSpatialAudioConfig
@@ -60,15 +57,93 @@ struct LocalSpatialAudioConfig {
 
 /** The IBaseSpatialAudioEngine class provides the common methods of ICloudSpatialAudioEngine and ILocalSpatialAudioEngine.
  */
-class IBaseSpatialAudioEngine: public RefCountInterface {
+class ILocalSpatialAudioEngine: public RefCountInterface {
  protected:
-  virtual ~IBaseSpatialAudioEngine() {}
+  virtual ~ILocalSpatialAudioEngine() {}
 
  public:
   /**
    * Releases all the resources occupied by spatial audio engine.
    */
   virtual void release() = 0;
+
+  /**
+   * Initializes the ILocalSpatialAudioEngine object and allocates the internal resources.
+   *
+   * @note Ensure that you call IRtcEngine::queryInterface and initialize before calling any other ILocalSpatialAudioEngine APIs.
+   *
+   * @param config The pointer to the LocalSpatialAudioConfig. See #LocalSpatialAudioConfig.
+   *
+   * @return
+   * - 0: Success.
+   * - <0: Failure.
+   */
+  virtual int initialize(const LocalSpatialAudioConfig& config) = 0;
+  /**
+   * Updates the position information of remote user. You should call it when remote user whose role is broadcaster moves.
+   *
+   * @param uid The remote user ID. It should be the same as RTC channel remote user id.
+   * @param posInfo The position information of remote user. See #RemoteVoicePositionInfo.
+   * @return
+   * - 0: Success.
+   * - <0: Failure.
+   */
+  virtual int updateRemotePosition(uid_t uid, const RemoteVoicePositionInfo &posInfo) = 0;
+  /**
+   * Updates the position of remote user. It's supposed to use with IRtcEngineEx::joinChannelEx.
+   *
+   * @param uid The remote user ID. It should be the same as RTC channel remote user id.
+   * @param posInfo The position information of remote user. See #RemoteVoicePositionInfo.
+   * @param connection The RTC connection whose spatial audio effect you want to update. See #RtcConnection.
+   * @return
+   * - 0: Success.
+   * - <0: Failure.
+   */
+  virtual int updateRemotePositionEx(uid_t uid, const RemoteVoicePositionInfo &posInfo, const RtcConnection& connection) = 0;
+  /**
+   * Remove the position information of remote user. You should call it when remote user called IRtcEngine::leaveChannel.
+   *
+   * @param uid The remote user ID. It should be the same as RTC channel remote user id.
+   * @return
+   * - 0: Success.
+   * - <0: Failure.
+   */
+  virtual int removeRemotePosition(uid_t uid) = 0;
+  /**
+   * Remove the position information of remote user. It's supposed to use with IRtcEngineEx::joinChannelEx.
+   *
+   * @param uid The remote user ID. It should be the same as RTC channel remote user id.
+   * @param connection The RTC connection whose spatial audio effect you want to update. See #RtcConnection.
+   * @return
+   * - 0: Success.
+   * - <0: Failure.
+   */
+  virtual int removeRemotePositionEx(uid_t uid, const RtcConnection& connection) = 0;
+  /**
+   * Clear the position informations of remote users. It's supposed to use with IRtcEngineEx::joinChannelEx.
+   *
+   * @return
+   * - 0: Success.
+   * - <0: Failure.
+   */
+  virtual int clearRemotePositionsEx(const RtcConnection& connection) = 0;
+  /**
+   * Updates the position of local user. This method is used in scene with multi RtcConnection.
+   *
+   * @note
+   * - This method is only effective in ILocalSpatialAudioEngine currently.
+   *
+   * @param position The sound position of the user. The coordinate order is forward, right, and up.
+   * @param axisForward The vector in the direction of the forward axis in the coordinate system.
+   * @param axisRight The vector in the direction of the right axis in the coordinate system.
+   * @param axisUp The vector in the direction of the up axis in the coordinate system.
+   * @param connection The RTC connection whose spatial audio effect you want to update.
+   * @return
+   * - 0: Success.
+   * - <0: Failure.
+   */
+  virtual int updateSelfPositionEx(const float position[3], const float axisForward[3], const float axisRight[3], const float axisUp[3], const RtcConnection& connection) = 0;
+
   /**
    * This method sets the maximum number of streams that a player can receive in a
    * specified audio reception range.
@@ -136,24 +211,7 @@ class IBaseSpatialAudioEngine: public RefCountInterface {
    * - 0: Success.
    * - <0: Failure.
    */
-  virtual int updateSelfPosition(float position[3], float axisForward[3], float axisRight[3], float axisUp[3]) = 0;
-  /**
-   * Updates the position of local user. This method is used in scene with multi RtcConnection.
-   *
-   * @note
-   * - This method is only effective in ILocalSpatialAudioEngine currently.
-   *
-   * @param position The sound position of the user. The coordinate order is forward, right, and up.
-   * @param axisForward The vector in the direction of the forward axis in the coordinate system.
-   * @param axisRight The vector in the direction of the right axis in the coordinate system.
-   * @param axisUp The vector in the direction of the up axis in the coordinate system.
-   * @param connection The RTC connection whose spatial audio effect you want to update.
-   * @return
-   * - 0: Success.
-   * - <0: Failure.
-   */
-  virtual int updateSelfPositionEx(float position[3], float axisForward[3], float axisRight[3], float axisUp[3], const RtcConnection& connection) = 0;
-
+  virtual int updateSelfPosition(const float position[3], const float axisForward[3], const float axisRight[3], const float axisUp[3]) = 0;
   /**
    * Updates the position of a media player in scene. This method has same behavior both in ICloudSpatialAudioEngine and ILocalSpatialAudioEngine.
    *
@@ -196,28 +254,7 @@ class IBaseSpatialAudioEngine: public RefCountInterface {
    * - <0: Failure.
    */
   virtual int muteAllRemoteAudioStreams(bool mute) = 0;
-    
-    
-  /**
-   * Setting up sound Space
-   *
-   * @param zones The Sound space array
-   * @param zoneCount the sound Space count of  array
-   * @return
-   * - 0: Success.
-   * - <0: Failure.
-   */
-  virtual int setZones(const SpatialAudioZone *zones, unsigned int zoneCount) = 0;
-  /**
-   * Set the audio attenuation coefficient of the player
-   * @param playerId The ID of the media player. You can get it by IMediaPlayer::getMediaPlayerId.
-   * @param attenuation The audio attenuation of the  media player.
-   * @param forceSet Whether to force the setting of audio attenuation coefficient.
-   * @return
-   * - 0: Success.
-   * - <0: Failure.
-   */
-  virtual int setPlayerAttenuation(int playerId, double attenuation, bool forceSet) = 0;
+  
   /**
    * Mute or unmute remote user audio stream.
    *
@@ -228,65 +265,29 @@ class IBaseSpatialAudioEngine: public RefCountInterface {
    * - <0: Failure.
    */
   virtual int muteRemoteAudioStream(uid_t uid, bool mute) = 0;
-};
-
-class ILocalSpatialAudioEngine : public IBaseSpatialAudioEngine {
-protected:
-  virtual ~ILocalSpatialAudioEngine() {}
   
-public:
-  /**
-   * Initializes the ILocalSpatialAudioEngine object and allocates the internal resources.
-   *
-   * @note Ensure that you call IRtcEngine::queryInterface and initialize before calling any other ILocalSpatialAudioEngine APIs.
-   *
-   * @param config The pointer to the LocalSpatialAudioConfig. See #LocalSpatialAudioConfig.
-   *
-   * @return
-   * - 0: Success.
-   * - <0: Failure.
-   */
-  virtual int initialize(const LocalSpatialAudioConfig& config) = 0;
-  /**
-   * Updates the position information of remote user. You should call it when remote user whose role is broadcaster moves.
-   *
-   * @param uid The remote user ID. It should be the same as RTC channel remote user id.
-   * @param posInfo The position information of remote user. See #RemoteVoicePositionInfo.
-   * @return
-   * - 0: Success.
-   * - <0: Failure.
-   */
-  virtual int updateRemotePosition(uid_t uid, const RemoteVoicePositionInfo &posInfo) = 0;
-  /**
-   * Updates the position of remote user. It's supposed to use with IRtcEngineEx::joinChannelEx.
-   *
-   * @param uid The remote user ID. It should be the same as RTC channel remote user id.
-   * @param posInfo The position information of remote user. See #RemoteVoicePositionInfo.
-   * @param connection The RTC connection whose spatial audio effect you want to update. See #RtcConnection.
-   * @return
-   * - 0: Success.
-   * - <0: Failure.
-   */
-  virtual int updateRemotePositionEx(uid_t uid, const RemoteVoicePositionInfo &posInfo, const RtcConnection& connection) = 0;
+  virtual int setRemoteAudioAttenuation(uid_t uid, double attenuation, bool forceSet) = 0;
+    
   /**
-   * Remove the position information of remote user. You should call it when remote user called IRtcEngine::leaveChannel.
+   * Setting up sound Space
    *
-   * @param uid The remote user ID. It should be the same as RTC channel remote user id.
+   * @param zones The Sound space array
+   * @param zoneCount the sound Space count of  array
    * @return
    * - 0: Success.
    * - <0: Failure.
    */
-  virtual int removeRemotePosition(uid_t uid) = 0;
+  virtual int setZones(const SpatialAudioZone *zones, unsigned int zoneCount) = 0;
   /**
-   * Remove the position information of remote user. It's supposed to use with IRtcEngineEx::joinChannelEx.
-   *
-   * @param uid The remote user ID. It should be the same as RTC channel remote user id.
-   * @param connection The RTC connection whose spatial audio effect you want to update. See #RtcConnection.
+   * Set the audio attenuation coefficient of the player
+   * @param playerId The ID of the media player. You can get it by IMediaPlayer::getMediaPlayerId.
+   * @param attenuation The audio attenuation of the  media player.
+   * @param forceSet Whether to force the setting of audio attenuation coefficient.
    * @return
    * - 0: Success.
    * - <0: Failure.
    */
-  virtual int removeRemotePositionEx(uid_t uid, const RtcConnection& connection) = 0;
+  virtual int setPlayerAttenuation(int playerId, double attenuation, bool forceSet) = 0;
   /**
    * Clear the position informations of remote users.
    *
@@ -294,21 +295,8 @@ class ILocalSpatialAudioEngine : public IBaseSpatialAudioEngine {
    * - 0: Success.
    * - <0: Failure.
    */
-  virtual int clearRemotePositions() = 0;
-  /**
-   * Clear the position informations of remote users. It's supposed to use with IRtcEngineEx::joinChannelEx.
-   *
-   * @return
-   * - 0: Success.
-   * - <0: Failure.
-   */
-  virtual int clearRemotePositionsEx(const RtcConnection& connection) = 0;
-  
-  
-  virtual int setRemoteAudioAttenuation(uid_t uid, double attenuation, bool forceSet) = 0;
+  virtual int clearRemotePositions() = 0;  
 };
 
 }  // namespace rtc
 }  // namespace agora
-
-#endif
diff --git a/android/src/main/cpp/third_party/include/iris/iris_engine_base.h b/android/src/main/cpp/third_party/include/iris/iris_engine_base.h
index a7c2a15c2..bbaa73288 100644
--- a/android/src/main/cpp/third_party/include/iris/iris_engine_base.h
+++ b/android/src/main/cpp/third_party/include/iris/iris_engine_base.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include "iris_module.h"
+#include "iris_base.h"
 
 class IApiEngineBase {
  public:
diff --git a/android/src/main/cpp/third_party/include/iris/iris_module.h b/android/src/main/cpp/third_party/include/iris/iris_module.h
index e98489975..0ec4eb531 100644
--- a/android/src/main/cpp/third_party/include/iris/iris_module.h
+++ b/android/src/main/cpp/third_party/include/iris/iris_module.h
@@ -6,26 +6,16 @@
 #define IRIS_DELEGATE_H_
 
 #include "iris_base.h"
-#include <string>
 
 namespace agora {
 namespace iris {
 
-class IRIS_DEBUG_CPP_API IrisEventHandler {
+class IrisEventHandler {
  public:
   virtual ~IrisEventHandler() = default;
 
  public:
-  virtual void OnEvent(EventParam *param){};
-};
-
-class IModule {
- public:
-  virtual ~IModule(){};
-  virtual void Initialize(void *rtc_engine) = 0;
-  virtual void Release() = 0;
-  virtual int CallApi(const char *func_name, const char *buff,
-                      uint32_t buffLength, std::string &out) = 0;
+  virtual void OnEvent(EventParam *param) {}
 };
 
 }// namespace iris
diff --git a/android/src/main/cpp/third_party/include/iris/iris_platform.h b/android/src/main/cpp/third_party/include/iris/iris_platform.h
index c9b9ec916..a485a3580 100644
--- a/android/src/main/cpp/third_party/include/iris/iris_platform.h
+++ b/android/src/main/cpp/third_party/include/iris/iris_platform.h
@@ -64,14 +64,6 @@
 #define IRIS_DEPRECATED
 #endif
 
-#if defined(IRIS_DEBUG)
-#define IRIS_DEBUG_API IRIS_API
-#define IRIS_DEBUG_CPP_API IRIS_CPP_API
-#else
-#define IRIS_DEBUG_API
-#define IRIS_DEBUG_CPP_API
-#endif
-
 #if defined(__GUNC__)
 #define COMPILER_IS_GCC
 #if defined(__MINGW32__) || defined(__MINGW64__)
diff --git a/android/src/main/cpp/third_party/include/iris/iris_queue.h b/android/src/main/cpp/third_party/include/iris/iris_queue.h
deleted file mode 100644
index ff0fee385..000000000
--- a/android/src/main/cpp/third_party/include/iris/iris_queue.h
+++ /dev/null
@@ -1,69 +0,0 @@
-#ifndef __IRIS_QUEUE_H__
-#define __IRIS_QUEUE_H__
-
-#include <assert.h>
-#include <mutex>
-#include <vector>
-
-template<class T>
-class QueueBase {
- public:
-  QueueBase() : max_size_(0) {}
-
-  bool add(T *obj) {
-    std::lock_guard<std::mutex> lock(mutex_);
-    assert(obj != nullptr);
-    if (max_size_ != 0 && objects_.size() >= max_size_) { return false; }
-    objects_.emplace_back(obj);
-    return true;
-  }
-
-  bool addUnique(T *obj) {
-    std::lock_guard<std::mutex> lock(mutex_);
-    assert(obj != nullptr);
-    if (max_size_ != 0 && objects_.size() >= max_size_) { return false; }
-
-    for (auto it = objects_.begin(); it != objects_.end(); it++) {
-      if (obj == (*it)) { return false; }
-    }
-
-    objects_.emplace_back(obj);
-    return true;
-  }
-
-  bool remove(T *obj) {
-    std::lock_guard<std::mutex> lock(mutex_);
-    assert(obj != nullptr);
-    for (auto it = objects_.begin(); it != objects_.end(); it++) {
-      if (obj == (*it)) {
-        objects_.erase(it);
-        return true;
-      }
-    }
-    return false;
-  }
-
-  int count() { return objects_.size(); }
-
-  void set_maxsize(size_t maxsize) { max_size_ = maxsize; }
-
-  T *get(int i) {
-    if (objects_.size() > 0) return objects_[i];
-    else
-      return nullptr;
-  }
-
-  void clear() {
-    std::lock_guard<std::mutex> lock(mutex_);
-    objects_.clear();
-  }
-
- public:
-  std::mutex mutex_;
-
- private:
-  std::vector<T *> objects_;
-  size_t max_size_;
-};
-
-#endif
\ No newline at end of file
diff --git a/android/src/main/cpp/third_party/include/iris/iris_rtc_api_type.h b/android/src/main/cpp/third_party/include/iris/iris_rtc_api_type.h
index 6f768ff8e..858c4c561 100644
--- a/android/src/main/cpp/third_party/include/iris/iris_rtc_api_type.h
+++ b/android/src/main/cpp/third_party/include/iris/iris_rtc_api_type.h
@@ -26,6 +26,7 @@
   "RtcEngine_startMediaRenderingTracing"
 #define FUNC_RTCENGINEEX_STARTMEDIARENDERINGTRACINGEX                          \
   "RtcEngineEx_startMediaRenderingTracingEx"
+#define FUNC_RTCENGINEEX_SETPARAMETERSEX "RtcEngineEx_setParametersEx"
 #define FUNC_RTCENGINE_ENABLEINSTANTMEDIARENDERING                             \
   "RtcEngine_enableInstantMediaRendering"
 #define FUNC_RTCENGINE_RELEASE "RtcEngine_release"
@@ -34,6 +35,7 @@
 #define FUNC_RTCENGINE_GETVERSION "RtcEngine_getVersion"
 #define FUNC_RTCENGINE_GETERRORDESCRIPTION "RtcEngine_getErrorDescription"
 #define FUNC_RTCENGINE_QUERYCODECCAPABILITY "RtcEngine_queryCodecCapability"
+#define FUNC_RTCENGINE_QUERYDEVICESCORE "RtcEngine_queryDeviceScore"
 #define FUNC_RTCENGINE_JOINCHANNEL "RtcEngine_joinChannel"
 #define FUNC_RTCENGINE_JOINCHANNEL2 "RtcEngine_joinChannel2"
 #define FUNC_RTCENGINE_UPDATECHANNELMEDIAOPTIONS                               \
@@ -74,6 +76,7 @@
 #define FUNC_RTCENGINE_SETUPREMOTEVIDEO "RtcEngine_setupRemoteVideo"
 #define FUNC_RTCENGINE_SETUPLOCALVIDEO "RtcEngine_setupLocalVideo"
 #define FUNC_RTCENGINE_SETVIDEOSCENARIO "RtcEngine_setVideoScenario"
+#define FUNC_RTCENGINE_SETVIDEOQOEPREFERENCE "RtcEngine_setVideoQoEPreference"
 #define FUNC_RTCENGINE_ENABLEAUDIO "RtcEngine_enableAudio"
 #define FUNC_RTCENGINE_DISABLEAUDIO "RtcEngine_disableAudio"
 #define FUNC_RTCENGINE_SETAUDIOPROFILE "RtcEngine_setAudioProfile"
@@ -288,9 +291,6 @@
 #define FUNC_RTCENGINE_GETCALLID "RtcEngine_getCallId"
 #define FUNC_RTCENGINE_RATE "RtcEngine_rate"
 #define FUNC_RTCENGINE_COMPLAIN "RtcEngine_complain"
-//#define FUNC_RTCENGINE_ADDPUBLISHSTREAMURL "RtcEngine_addPublishStreamUrl"
-//#define FUNC_RTCENGINE_REMOVEPUBLISHSTREAMURL "RtcEngine_removePublishStreamUrl"
-//#define FUNC_RTCENGINE_SETLIVETRANSCODING "RtcEngine_setLiveTranscoding"
 #define FUNC_RTCENGINE_STARTRTMPSTREAMWITHOUTTRANSCODING                       \
   "RtcEngine_startRtmpStreamWithoutTranscoding"
 #define FUNC_RTCENGINE_STARTRTMPSTREAMWITHTRANSCODING                          \
@@ -324,7 +324,6 @@
 #define FUNC_RTCENGINE_SENDSTREAMMESSAGE "RtcEngine_sendStreamMessage"
 #define FUNC_RTCENGINE_ADDVIDEOWATERMARK "RtcEngine_addVideoWatermark"
 #define FUNC_RTCENGINE_ADDVIDEOWATERMARK2 "RtcEngine_addVideoWatermark2"
-//#define FUNC_RTCENGINE_CLEARVIDEOWATERMARK "RtcEngine_clearVideoWatermark"
 #define FUNC_RTCENGINE_CLEARVIDEOWATERMARKS "RtcEngine_clearVideoWatermarks"
 #define FUNC_RTCENGINE_PAUSEAUDIO "RtcEngine_pauseAudio"
 #define FUNC_RTCENGINE_RESUMEAUDIO "RtcEngine_resumeAudio"
@@ -352,9 +351,6 @@
 #define FUNC_RTCENGINE_GETUSERINFOBYUSERACCOUNT                                \
   "RtcEngine_getUserInfoByUserAccount"
 #define FUNC_RTCENGINE_GETUSERINFOBYUID "RtcEngine_getUserInfoByUid"
-#define FUNC_RTCENGINE_STARTCHANNELMEDIARELAY "RtcEngine_startChannelMediaRelay"
-#define FUNC_RTCENGINE_UPDATECHANNELMEDIARELAY                                 \
-  "RtcEngine_updateChannelMediaRelay"
 #define FUNC_RTCENGINE_STOPCHANNELMEDIARELAY "RtcEngine_stopChannelMediaRelay"
 #define FUNC_RTCENGINE_PAUSEALLCHANNELMEDIARELAY                               \
   "RtcEngine_pauseAllChannelMediaRelay"
@@ -369,13 +365,7 @@
 #define FUNC_RTCENGINE_STOPDIRECTCDNSTREAMING "RtcEngine_stopDirectCdnStreaming"
 #define FUNC_RTCENGINE_UPDATEDIRECTCDNSTREAMINGMEDIAOPTIONS                    \
   "RtcEngine_updateDirectCdnStreamingMediaOptions"
-//to delete
-//#define FUNC_RTCENGINE_PUSHDIRECTCDNSTREAMINGCUSTOMVIDEOFRAME                  \
-//  "RtcEngine_pushDirectCdnStreamingCustomVideoFrame"
 #define FUNC_RTCENGINE_TAKESNAPSHOT "RtcEngine_takeSnapshot"
-//to delete
-//#define FUNC_RTCENGINE_SETCONTENTINSPECT "RtcEngine_SetContentInspect"
-//#define FUNC_RTCENGINE_SWITCHCHANNEL "RtcEngine_switchChannel"
 #define FUNC_RTCENGINE_STARTRHYTHMPLAYER "RtcEngine_startRhythmPlayer"
 #define FUNC_RTCENGINE_STOPRHYTHMPLAYER "RtcEngine_stopRhythmPlayer"
 #define FUNC_RTCENGINE_CONFIGRHYTHMPLAYER "RtcEngine_configRhythmPlayer"
@@ -385,8 +375,6 @@
   "RtcEngine_adjustCustomAudioPlayoutVolume"
 #define FUNC_RTCENGINE_SETCLOUDPROXY "RtcEngine_setCloudProxy"
 #define FUNC_RTCENGINE_SETLOCALACCESSPOINT "RtcEngine_setLocalAccessPoint"
-//#define FUNC_RTCENGINE_ENABLEFISHEYECORRECTION                                 \
-//  "RtcEngine_enableFishEyeCorrection"
 #define FUNC_RTCENGINE_SETADVANCEDAUDIOOPTIONS                                 \
   "RtcEngine_setAdvancedAudioOptions"
 #define FUNC_RTCENGINE_SETAVSYNCSOURCE "RtcEngine_setAVSyncSource"
@@ -469,7 +457,8 @@
 #define FUNC_RTCENGINE_ISFEATUREAVAILABLEONDEVICE                              \
   "RtcEngine_isFeatureAvailableOnDevice"
 #define FUNC_RTCENGINE_PRELOADCHANNEL "RtcEngine_preloadChannel"
-#define FUNC_RTCENGINE_PRELOADCHANNEL2 "RtcEngine_preloadChannel2"
+#define FUNC_RTCENGINE_PRELOADCHANNELWITHUSERACCOUNT                           \
+  "RtcEngine_preloadChannelWithUserAccount"
 #define FUNC_RTCENGINE_UPDATEPRELOADCHANNELTOKEN                               \
   "RtcEngine_updatePreloadChannelToken"
 // class IRtcEngine end
@@ -501,12 +490,10 @@
 #define FUNC_MEDIAPLAYER_GETSTREAMCOUNT "MediaPlayer_getStreamCount"
 #define FUNC_MEDIAPLAYER_GETSTREAMINFO "MediaPlayer_getStreamInfo"
 #define FUNC_MEDIAPLAYER_SETLOOPCOUNT "MediaPlayer_setLoopCount"
-/*#define FUNC_MEDIAPLAYER_MUTEAUDIO "MediaPlayer_muteAudio"
-#define FUNC_MEDIAPLAYER_ISAUDIOMUTED "MediaPlayer_isAudioMuted"
-#define FUNC_MEDIAPLAYER_MUTEVIDEO "MediaPlayer_muteVideo"
-#define FUNC_MEDIAPLAYER_ISVIDEOMUTED "MediaPlayer_isVideoMuted"*/
 #define FUNC_MEDIAPLAYER_SETPLAYBACKSPEED "MediaPlayer_setPlaybackSpeed"
 #define FUNC_MEDIAPLAYER_SELECTAUDIOTRACK "MediaPlayer_selectAudioTrack"
+#define FUNC_MEDIAPLAYER_SELECTMULTIAUDIOTRACK                                 \
+  "MediaPlayer_selectMultiAudioTrack"
 #define FUNC_MEDIAPLAYER_SETPLAYEROPTION "MediaPlayer_setPlayerOption"
 #define FUNC_MEDIAPLAYER_SETPLAYEROPTION2 "MediaPlayer_setPlayerOption2"
 #define FUNC_MEDIAPLAYER_TAKESCREENSHOT "MediaPlayer_takeScreenshot"
@@ -683,6 +670,10 @@
   "AudioDeviceManager_getPlaybackDefaultDevice"
 #define FUNC_AUDIODEVICEMANAGER_GETRECORDINGDEAFULTDEVICE                      \
   "AudioDeviceManager_getRecordingDefaultDevice"
+#define FUNC_AUDIODEVICEMANAGER_GETPLAYBACKAUDIODEVICEINFO                     \
+  "AudioDeviceManager_getPlaybackAudioDeviceInfo"
+#define FUNC_AUDIODEVICEMANAGER_GETRECORDINGAUDIODEVICEINFO                    \
+  "AudioDeviceManager_getRecordingAudioDeviceInfo"
 // class IAudioDeviceManager end
 
 // class ICloudSpatialAudioEngine start
@@ -847,8 +838,6 @@
 #define FUNC_RTCENGINEEX_GETUSERINFOBYUIDEX "RtcEngineEx_getUserInfoByUidEx"
 #define FUNC_RTCENGINEEX_ENABLEDUALSTREAMMODEEX                                \
   "RtcEngineEx_enableDualStreamModeEx"
-//#define FUNC_RTCENGINEEX_ADDPUBLISHSTREAMURLEX                                 \
-//  "RtcEngineEx_addPublishStreamUrlEx"
 #define FUNC_RTCENGINEEX_SETSUBSCRIBEVIDEOBLOCKLISTEX                          \
   "RtcEngineEx_setSubscribeVideoBlocklistEx"
 
@@ -881,8 +870,6 @@
   "RtcEngineEx_pauseAllChannelMediaRelayEx"
 #define FUNC_RTCENGINEEX_RESUMEALLCHANNELMEDIARELAYEX                          \
   "RtcEngineEx_resumeAllChannelMediaRelayEx"
-#define FUNC_RTCENGINEEX_STARTCHANNELMEDIARELAYEX                              \
-  "RtcEngineEx_startChannelMediaRelayEx"
 #define FUNC_RTCENGINEEX_STARTRTMPSTREAMWITHTRANSCODINGEX                      \
   "RtcEngineEx_startRtmpStreamWithTranscodingEx"
 #define FUNC_RTCENGINEEX_STARTRTMPSTREAMWITHOUTTRANSCODINGEX                   \
@@ -890,8 +877,6 @@
 #define FUNC_RTCENGINEEX_STOPCHANNELMEDIARELAYEX                               \
   "RtcEngineEx_stopChannelMediaRelayEx"
 #define FUNC_RTCENGINEEX_STOPRTMPSTREAMEX "RtcEngineEx_stopRtmpStreamEx"
-#define FUNC_RTCENGINEEX_UPDATECHANNELMEDIARELAYEX                             \
-  "RtcEngineEx_updateChannelMediaRelayEx"
 #define FUNC_RTCENGINEEX_UPDATERTMPTRANSCODINGEX                               \
   "RtcEngineEx_updateRtmpTranscodingEx"
 #define FUNC_RTCENGINEEX_ADJUSTRECORDINGSIGNALVOLUMEEX                         \
diff --git a/android/src/main/cpp/third_party/include/iris/iris_rtc_engine.h b/android/src/main/cpp/third_party/include/iris/iris_rtc_engine.h
deleted file mode 100644
index 3497e0dbb..000000000
--- a/android/src/main/cpp/third_party/include/iris/iris_rtc_engine.h
+++ /dev/null
@@ -1,33 +0,0 @@
-//
-// Created by LXH on 2021/1/14.
-//
-
-#ifndef IRIS_RTC_ENGINE_H_
-#define IRIS_RTC_ENGINE_H_
-
-namespace agora {
-namespace iris {
-namespace rtc {
-
-class IRIS_DEBUG_CPP_API IIrisRtcEngine : public IModule {
- public:
-  virtual IModule *device_manager() = 0;
-
-  virtual IModule *media_player() = 0;
-
-  virtual IModule *local_audio_engine() = 0;
-
-  virtual IModule *cloud_audio_engine() = 0;
-
-  virtual IModule *media_recorder() = 0;
-
-  virtual IModule *media_player_cache_manager() = 0;
-
-  virtual IModule *music_center() = 0;
-};
-
-}// namespace rtc
-}// namespace iris
-}// namespace agora
-
-#endif//IRIS_RTC_ENGINE_H_
diff --git a/ios/agora_rtc_engine.podspec b/ios/agora_rtc_engine.podspec
index 0349b6371..88006a78e 100644
--- a/ios/agora_rtc_engine.podspec
+++ b/ios/agora_rtc_engine.podspec
@@ -23,8 +23,8 @@ Pod::Spec.new do |s|
     puts '[plugin_dev] Found .plugin_dev file, use vendored_frameworks instead.'
     s.vendored_frameworks = 'libs/*.xcframework'
   else
-  s.dependency 'AgoraIrisRTC_iOS', '4.2.6-build.3'
-  s.dependency 'AgoraRtcEngine_iOS', '4.2.6'
+  s.dependency 'AgoraIrisRTC_iOS', '4.3.0-dev.10'
+  s.dependency 'AgoraRtcEngine_iOS_Preview', '4.3.0-dev.9'
   end
   
   s.platform = :ios, '9.0'
diff --git a/macos/agora_rtc_engine.podspec b/macos/agora_rtc_engine.podspec
index fa1847170..d06d9f07c 100644
--- a/macos/agora_rtc_engine.podspec
+++ b/macos/agora_rtc_engine.podspec
@@ -21,8 +21,8 @@ A new flutter plugin project.
     puts '[plugin_dev] Found .plugin_dev file, use vendored_frameworks instead.'
     s.vendored_frameworks = 'libs/*.framework'
   else
-  s.dependency 'AgoraRtcEngine_macOS', '4.2.6'
-  s.dependency 'AgoraIrisRTC_macOS', '4.2.6-build.3'
+  s.dependency 'AgoraRtcEngine_macOS_Preview', '4.3.0-dev.9'
+  s.dependency 'AgoraIrisRTC_macOS', '4.3.0-dev.10'
   end
 
   s.platform = :osx, '10.11'
diff --git a/scripts/artifacts_version.sh b/scripts/artifacts_version.sh
index d6b6cc892..cf6915660 100644
--- a/scripts/artifacts_version.sh
+++ b/scripts/artifacts_version.sh
@@ -1,6 +1,6 @@
 set -e
 
-export IRIS_CDN_URL_ANDROID="https://download.agora.io/sdk/release/iris_4.2.6-build.3_DCG_Android_Video_20231116_0243.zip"
-export IRIS_CDN_URL_IOS="https://download.agora.io/sdk/release/iris_4.2.6-build.3_DCG_iOS_Video_20231116_0243.zip"
-export IRIS_CDN_URL_MACOS="https://download.agora.io/sdk/release/iris_4.2.6-build.3_DCG_Mac_Video_20231116_0243.zip"
-export IRIS_CDN_URL_WINDOWS="https://download.agora.io/sdk/release/iris_4.2.6-build.3_DCG_Windows_Video_20231116_0243.zip"
+export IRIS_CDN_URL_ANDROID="https://download.agora.io/sdk/release/iris_4.3.0-dev.10_DCG_Android_Video_20231207_0514.zip"
+export IRIS_CDN_URL_IOS="https://download.agora.io/sdk/release/iris_4.3.0-dev.10_DCG_iOS_Video_20231207_0514.zip"
+export IRIS_CDN_URL_MACOS="https://download.agora.io/sdk/release/iris_4.3.0-dev.10_DCG_Mac_Video_20231207_0514.zip"
+export IRIS_CDN_URL_WINDOWS="https://download.agora.io/sdk/release/iris_4.3.0-dev.10_DCG_Windows_Video_20231207_0514.zip"
diff --git a/windows/CMakeLists.txt b/windows/CMakeLists.txt
index 42f4ff576..677b5c544 100644
--- a/windows/CMakeLists.txt
+++ b/windows/CMakeLists.txt
@@ -12,8 +12,8 @@ project(${PROJECT_NAME} LANGUAGES CXX)
 # not be changed
 set(PLUGIN_NAME "agora_rtc_engine_plugin")
 
-set(IRIS_SDK_DOWNLOAD_URL "https://download.agora.io/sdk/release/iris_4.2.6-build.3_DCG_Windows_Video_20231116_0243.zip")
-set(IRIS_SDK_DOWNLOAD_NAME "iris_4.2.6-build.3_DCG_Windows")
+set(IRIS_SDK_DOWNLOAD_URL "https://download.agora.io/sdk/release/iris_4.3.0-dev.10_DCG_Windows_Video_20231207_0514.zip")
+set(IRIS_SDK_DOWNLOAD_NAME "iris_4.3.0-dev.10_DCG_Windows")
 set(RTC_SDK_DOWNLOAD_NAME "Agora_Native_SDK_for_Windows_FULL")
 set(IRIS_SDK_VERSION "v3_6_2_fix.1")