fix(linux): add frame processing latency and logging improvements

src/audio.cpp

@@ -115,6 +115,10 @@ namespace audio {
     opus_multistream_encoder_ctl(opus.get(), OPUS_SET_BITRATE(stream->bitrate));
     opus_multistream_encoder_ctl(opus.get(), OPUS_SET_VBR(0));
 
+    BOOST_LOG(info) << "Opus initialized: "sv << stream->sampleRate / 1000 << " kHz, "sv
+                    << stream->channelCount << " channels, "sv
+                    << stream->bitrate / 1000 << " kbps (total), LOWDELAY"sv;
+
     auto frame_size = config.packetDuration * stream->sampleRate / 1000;
     while (auto sample = samples->pop()) {
       buffer_t packet { 1400 };

src/platform/linux/kmsgrab.cpp

@@ -1685,7 +1685,9 @@ namespace platf {
         if (!fb->handles[0]) {
           BOOST_LOG(error) << "Couldn't get handle for DRM Framebuffer ["sv << plane->fb_id << "]: Probably not permitted"sv;
           BOOST_LOG((window_system != window_system_e::X11 || config::video.capture == "kms") ? fatal : error)
-            << "You must run [sudo setcap cap_sys_admin+p $(readlink -f $(which sunshine))] for KMS display capture to work!"sv;
+            << "You must run [sudo setcap cap_sys_admin+p $(readlink -f $(which sunshine))] for KMS display capture to work!\n"sv
+            << "If you installed from AppImage or Flatpak, please refer to the official documentation:\n"sv
+            << "https://docs.lizardbyte.dev/projects/sunshine/en/latest/about/setup.html#install"sv;
           break;
         }
 

src/platform/linux/vaapi.cpp

@@ -371,7 +371,7 @@ namespace va {
       return -1;
     }
 
-    BOOST_LOG(debug) << "vaapi vendor: "sv << vaQueryVendorString(display.get());
+    BOOST_LOG(info) << "vaapi vendor: "sv << vaQueryVendorString(display.get());
 
     *hw_device_buf = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_VAAPI);
     auto ctx = (AVHWDeviceContext *) (*hw_device_buf)->data;

src/platform/linux/x11grab.cpp

@@ -679,6 +679,7 @@
       }
       else {
         auto img_cookie = xcb::shm_get_image_unchecked(xcb.get(), display->root, offset_x, offset_y, width, height, ~0, XCB_IMAGE_FORMAT_Z_PIXMAP, seg, 0);
+        auto frame_timestamp = std::chrono::steady_clock::now();
 
         xcb_img_t img_reply { xcb::shm_get_image_reply(xcb.get(), img_cookie, nullptr) };
         if (!img_reply) {
@@ -691,6 +692,7 @@
         }
 
         std::copy_n((std::uint8_t *) data.data, frame_size(), img_out->data);
+        img_out->frame_timestamp = frame_timestamp;
 
         if (cursor) {
           blend_cursor(shm_xdisplay.get(), *img_out, offset_x, offset_y);

src/video.cpp

@@ -1294,6 +1294,10 @@ namespace video {
         return ret;
       }
 
+      if (av_packet->flags & AV_PKT_FLAG_KEY) {
+        BOOST_LOG(debug) << "Frame "sv << frame_nr << ": IDR Keyframe (AV_FRAME_FLAG_KEY)"sv;
+      }
+
       if ((frame->flags & AV_FRAME_FLAG_KEY) && !(av_packet->flags & AV_PKT_FLAG_KEY)) {
         BOOST_LOG(error) << "Encoder did not produce IDR frame when requested!"sv;
       }