diff --git a/BREAKING_CHANGES.md b/BREAKING_CHANGES.md
new file mode 100644
index 0000000..98c047b
--- /dev/null
+++ b/BREAKING_CHANGES.md
@@ -0,0 +1,4 @@
+# v0.24.0
+
+- use `FilterGraph`.`NewBuffersinkFilterContext` and `FilterGraph`.`NewBuffersrcFilterContext` instead of `FilterGraph`.`NewFilterContext` when creating `buffersink` and `buffersrc` filter contexts and use `BuffersinkFilterContext`.`GetFrame` and `BuffersrcFilterContext`.`AddFrame` to manipulate them. Use `BuffersinkFilterContext`.`FilterContext` and `BuffersrcFilterContext`.`FilterContext` in `FilterInOut`.`SetFilterContext`.
+- `FilterLink` has been removed and methods like `BuffersinkFilterContext`.`ChannelLayout` have been added instead
\ No newline at end of file
diff --git a/README.md b/README.md
index 7f8c98c..6b08601 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ Examples are located in the [examples](examples) directory and mirror as much as
 |Custom IO Demuxing|[see](examples/custom_io_demuxing/main.go)|[see](https://github.com/FFmpeg/FFmpeg/blob/n7.0/doc/examples/avio_reading.c)
 |Demuxing/Decoding|[see](examples/demuxing_decoding/main.go)|[see](https://github.com/FFmpeg/FFmpeg/blob/n7.0/doc/examples/demuxing_decoding.c)
 |Filtering|[see](examples/filtering/main.go)|[see](https://github.com/FFmpeg/FFmpeg/blob/n7.0/doc/examples/filtering_video.c)
+|Frame data manipulation|[see](examples/frame_data_manipulation/main.go)|X
 |Hardware Decoding|[see](examples/hardware_decoding/main.go)|[see](https://github.com/FFmpeg/FFmpeg/blob/n7.0/doc/examples/hw_decode.c)
 |Hardware Encoding|[see](examples/hardware_encoding/main.go)|[see](https://github.com/FFmpeg/FFmpeg/blob/n7.0/doc/examples/vaapi_encode.c)
 |Remuxing|[see](examples/remuxing/main.go)|[see](https://github.com/FFmpeg/FFmpeg/blob/n7.0/doc/examples/remuxing.c)
@@ -57,4 +58,8 @@ export PKG_CONFIG_PATH="{{ path to your working directory }}/tmp/n7.0/lib/pkgcon
 
 # Why astiav?
 
-After maintaining for several years the most starred [fork](https://github.com/asticode/goav) of [goav](https://github.com/giorgisio/goav), I've decided to write from scratch my own C bindings to fix most of the problems I still encountered using `goav`.
\ No newline at end of file
+After maintaining for several years the most starred [fork](https://github.com/asticode/goav) of [goav](https://github.com/giorgisio/goav), I've decided to write from scratch my own C bindings to fix most of the problems I still encountered using `goav`.
+
+# Breaking changes
+
+You can see the list of breaking changes [here](BREAKING_CHANGES.md).
\ No newline at end of file
diff --git a/astiav_test.go b/astiav_test.go
index d7673f3..64f7cb3 100644
--- a/astiav_test.go
+++ b/astiav_test.go
@@ -50,7 +50,7 @@ type helperInput struct {
 	lastFrame     *Frame
 }
 
-func (h *helper) inputFormatContext(name string) (fc *FormatContext, err error) {
+func (h *helper) inputFormatContext(name string, ifmt *InputFormat) (fc *FormatContext, err error) {
 	h.m.Lock()
 	i, ok := h.inputs[name]
 	if ok && i.formatContext != nil {
@@ -65,7 +65,7 @@ func (h *helper) inputFormatContext(name string) (fc *FormatContext, err error)
 	}
 	h.closer.Add(fc.Free)
 
-	if err = fc.OpenInput("testdata/"+name, nil, nil); err != nil {
+	if err = fc.OpenInput("testdata/"+name, ifmt, nil); err != nil {
 		err = fmt.Errorf("astiav_test: opening input failed: %w", err)
 		return
 	}
@@ -95,7 +95,7 @@ func (h *helper) inputFirstPacket(name string) (pkt *Packet, err error) {
 	h.m.Unlock()
 
 	var fc *FormatContext
-	if fc, err = h.inputFormatContext(name); err != nil {
+	if fc, err = h.inputFormatContext(name, nil); err != nil {
 		err = fmt.Errorf("astiav_test: getting input format context failed")
 		return
 	}
@@ -118,7 +118,7 @@ func (h *helper) inputFirstPacket(name string) (pkt *Packet, err error) {
 	return
 }
 
-func (h *helper) inputLastFrame(name string, mediaType MediaType) (f *Frame, err error) {
+func (h *helper) inputLastFrame(name string, mediaType MediaType, ifmt *InputFormat) (f *Frame, err error) {
 	h.m.Lock()
 	i, ok := h.inputs[name]
 	if ok && i.lastFrame != nil {
@@ -128,7 +128,7 @@ func (h *helper) inputLastFrame(name string, mediaType MediaType) (f *Frame, err
 	h.m.Unlock()
 
 	var fc *FormatContext
-	if fc, err = h.inputFormatContext(name); err != nil {
+	if fc, err = h.inputFormatContext(name, ifmt); err != nil {
 		err = fmt.Errorf("astiav_test: getting input format context failed: %w", err)
 		return
 	}
diff --git a/bit_stream_filter_context.go b/bit_stream_filter_context.go
index 39f1d4e..eaa6c87 100644
--- a/bit_stream_filter_context.go
+++ b/bit_stream_filter_context.go
@@ -60,8 +60,17 @@ func (bsfc *BitStreamFilterContext) ReceivePacket(p *Packet) error {
 }
 
 func (bsfc *BitStreamFilterContext) Free() {
-	classers.del(bsfc)
-	C.av_bsf_free(&bsfc.c)
+	if bsfc.c != nil {
+		// Make sure to clone the classer before freeing the object since
+		// the C free method may reset the pointer
+		c := newClonedClasser(bsfc)
+		C.av_bsf_free(&bsfc.c)
+		// Make sure to remove from classers after freeing the object since
+		// the C free method may use methods needing the classer
+		if c != nil {
+			classers.del(c)
+		}
+	}
 }
 
 func (bsfc *BitStreamFilterContext) InputTimeBase() Rational {
diff --git a/class.go b/class.go
index 48d81a2..7bc4594 100644
--- a/class.go
+++ b/class.go
@@ -52,6 +52,8 @@ type Classer interface {
 	Class() *Class
 }
 
+var _ Classer = (*UnknownClasser)(nil)
+
 type UnknownClasser struct {
 	c *Class
 }
@@ -64,6 +66,24 @@ func (c *UnknownClasser) Class() *Class {
 	return c.c
 }
 
+var _ Classer = (*ClonedClasser)(nil)
+
+type ClonedClasser struct {
+	c *Class
+}
+
+func newClonedClasser(c Classer) *ClonedClasser {
+	cl := c.Class()
+	if cl == nil {
+		return nil
+	}
+	return &ClonedClasser{c: newClassFromC(cl.ptr)}
+}
+
+func (c *ClonedClasser) Class() *Class {
+	return c.c
+}
+
 var classers = newClasserPool()
 
 type classerPool struct {
diff --git a/class_test.go b/class_test.go
index 72ae915..2187085 100644
--- a/class_test.go
+++ b/class_test.go
@@ -28,36 +28,48 @@ func TestClass(t *testing.T) {
 
 func TestClassers(t *testing.T) {
 	cl := len(classers.p)
-	f := AllocFilterGraph()
+	f1 := AllocFilterGraph()
+	f2 := AllocFilterGraph()
 	c := FindDecoder(CodecIDMjpeg)
 	require.NotNil(t, c)
+	bf := FindBitStreamFilterByName("null")
+	require.NotNil(t, bf)
+	bfc, err := AllocBitStreamFilterContext(bf)
+	require.NoError(t, err)
 	cc := AllocCodecContext(c)
 	require.NotNil(t, cc)
 	bufferSink := FindFilterByName("buffersink")
 	require.NotNil(t, bufferSink)
-	fc, err := f.NewFilterContext(bufferSink, "filter_out", nil)
+	fc1, err := f1.NewFilterContext(bufferSink, "filter_out", nil)
+	require.NoError(t, err)
+	_, err = f2.NewFilterContext(bufferSink, "filter_out", nil)
 	require.NoError(t, err)
 	fmc1 := AllocFormatContext()
 	fmc2 := AllocFormatContext()
 	require.NoError(t, fmc2.OpenInput("testdata/video.mp4", nil, nil))
 	path := filepath.Join(t.TempDir(), "iocontext.txt")
-	ic, err := OpenIOContext(path, NewIOContextFlags(IOContextFlagWrite))
+	ic1, err := OpenIOContext(path, NewIOContextFlags(IOContextFlagWrite))
 	require.NoError(t, err)
 	defer os.RemoveAll(path)
+	ic2, err := AllocIOContext(1, true, nil, nil, nil)
+	require.NoError(t, err)
 	ssc, err := CreateSoftwareScaleContext(1, 1, PixelFormatRgba, 2, 2, PixelFormatRgba, NewSoftwareScaleContextFlags())
 	require.NoError(t, err)
 
-	require.Equal(t, cl+8, len(classers.p))
-	v, ok := classers.get(unsafe.Pointer(f.c))
+	require.Equal(t, cl+12, len(classers.p))
+	v, ok := classers.get(unsafe.Pointer(f1.c))
 	require.True(t, ok)
-	require.Equal(t, f, v)
+	require.Equal(t, f1, v)
 
+	bfc.Free()
 	cc.Free()
-	fc.Free()
-	f.Free()
+	fc1.Free()
+	f1.Free()
+	f2.Free()
 	fmc1.Free()
 	fmc2.CloseInput()
-	require.NoError(t, ic.Close())
+	require.NoError(t, ic1.Close())
+	ic2.Free()
 	ssc.Free()
 	require.Equal(t, cl, len(classers.p))
 }
diff --git a/codec_context.go b/codec_context.go
index 8ab8dfa..9044944 100644
--- a/codec_context.go
+++ b/codec_context.go
@@ -43,8 +43,17 @@ func (cc *CodecContext) Free() {
 		C.av_buffer_unref(&cc.hfc.c)
 		cc.hfc = nil
 	}
-	classers.del(cc)
-	C.avcodec_free_context(&cc.c)
+	if cc.c != nil {
+		// Make sure to clone the classer before freeing the object since
+		// the C free method may reset the pointer
+		c := newClonedClasser(cc)
+		C.avcodec_free_context(&cc.c)
+		// Make sure to remove from classers after freeing the object since
+		// the C free method may use methods needing the classer
+		if c != nil {
+			classers.del(c)
+		}
+	}
 }
 
 func (cc *CodecContext) String() string {
diff --git a/codec_context_test.go b/codec_context_test.go
index 714c55f..7f7601b 100644
--- a/codec_context_test.go
+++ b/codec_context_test.go
@@ -7,7 +7,7 @@ import (
 )
 
 func TestCodecContext(t *testing.T) {
-	fc, err := globalHelper.inputFormatContext("video.mp4")
+	fc, err := globalHelper.inputFormatContext("video.mp4", nil)
 	require.NoError(t, err)
 	ss := fc.Streams()
 	require.Len(t, ss, 2)
diff --git a/codec_parameters_test.go b/codec_parameters_test.go
index e5a2358..caaff25 100644
--- a/codec_parameters_test.go
+++ b/codec_parameters_test.go
@@ -7,7 +7,7 @@ import (
 )
 
 func TestCodecParameters(t *testing.T) {
-	fc, err := globalHelper.inputFormatContext("video.mp4")
+	fc, err := globalHelper.inputFormatContext("video.mp4", nil)
 	require.NoError(t, err)
 	ss := fc.Streams()
 	require.Len(t, ss, 2)
diff --git a/examples/demuxing_decoding/main.go b/examples/demuxing_decoding/main.go
index c2b941d..5fce9e0 100644
--- a/examples/demuxing_decoding/main.go
+++ b/examples/demuxing_decoding/main.go
@@ -4,7 +4,6 @@ import (
 	"errors"
 	"flag"
 	"fmt"
-	"image"
 	"log"
 	"strings"
 
@@ -107,7 +106,6 @@ func main() {
 	}
 
 	// Loop through packets
-	var i image.Image
 	for {
 		// Read frame
 		if err := inputFormatContext.ReadFrame(pkt); err != nil {
@@ -138,35 +136,8 @@ func main() {
 				log.Fatal(fmt.Errorf("main: receiving frame failed: %w", err))
 			}
 
-			// Do something with decoded frame
-			if s.inputStream.CodecParameters().MediaType() == astiav.MediaTypeVideo {
-				// In this example, we'll process the frame data but you can do whatever you feel like
-				// with the decoded frame
-				fd := f.Data()
-
-				// Image has not yet been initialized
-				// If the image format can change in the stream, you'll need to guess image format for every frame
-				if i == nil {
-					// Guess image format
-					// It might not return an image.Image in the proper format for your use case, in that case
-					// you can skip this step and provide .ToImage() with your own image.Image
-					var err error
-					if i, err = fd.GuessImageFormat(); err != nil {
-						log.Fatal(fmt.Errorf("main: guessing image format failed: %w", err))
-					}
-				}
-
-				// Copy frame data to the image
-				if err := fd.ToImage(i); err != nil {
-					log.Fatal(fmt.Errorf("main: copying frame data to the image failed: %w", err))
-				}
-
-				// Log
-				log.Printf("new video frame: stream %d - pts: %d - size: %dx%d - color at (0,0): %+v", pkt.StreamIndex(), f.Pts(), i.Bounds().Dx(), i.Bounds().Dy(), i.At(0, 0))
-			} else {
-				// Log
-				log.Printf("new audio frame: stream %d - pts: %d", pkt.StreamIndex(), f.Pts())
-			}
+			// Log
+			log.Printf("new %s frame: stream %d - pts: %d", s.inputStream.CodecParameters().MediaType(), pkt.StreamIndex(), f.Pts())
 		}
 	}
 
diff --git a/examples/filtering/main.go b/examples/filtering/main.go
index 9090fc0..993bd7f 100644
--- a/examples/filtering/main.go
+++ b/examples/filtering/main.go
@@ -23,8 +23,8 @@ var (
 )
 
 type stream struct {
-	buffersinkContext *astiav.FilterContext
-	buffersrcContext  *astiav.FilterContext
+	buffersinkContext *astiav.BuffersinkFilterContext
+	buffersrcContext  *astiav.BuffersrcFilterContext
 	decCodec          *astiav.Codec
 	decCodecContext   *astiav.CodecContext
 	decFrame          *astiav.Frame
@@ -232,7 +232,7 @@ func initFilter() (err error) {
 	}
 
 	// Create filter contexts
-	if s.buffersrcContext, err = s.filterGraph.NewFilterContext(buffersrc, "in", astiav.FilterArgs{
+	if s.buffersrcContext, err = s.filterGraph.NewBuffersrcFilterContext(buffersrc, "in", astiav.FilterArgs{
 		"pix_fmt":      strconv.Itoa(int(s.decCodecContext.PixelFormat())),
 		"pixel_aspect": s.decCodecContext.SampleAspectRatio().String(),
 		"time_base":    s.inputStream.TimeBase().String(),
@@ -241,20 +241,20 @@ func initFilter() (err error) {
 		err = fmt.Errorf("main: creating buffersrc context failed: %w", err)
 		return
 	}
-	if s.buffersinkContext, err = s.filterGraph.NewFilterContext(buffersink, "in", nil); err != nil {
+	if s.buffersinkContext, err = s.filterGraph.NewBuffersinkFilterContext(buffersink, "in", nil); err != nil {
 		err = fmt.Errorf("main: creating buffersink context failed: %w", err)
 		return
 	}
 
 	// Update outputs
 	outputs.SetName("in")
-	outputs.SetFilterContext(s.buffersrcContext)
+	outputs.SetFilterContext(s.buffersrcContext.FilterContext())
 	outputs.SetPadIdx(0)
 	outputs.SetNext(nil)
 
 	// Update inputs
 	inputs.SetName("out")
-	inputs.SetFilterContext(s.buffersinkContext)
+	inputs.SetFilterContext(s.buffersinkContext.FilterContext())
 	inputs.SetPadIdx(0)
 	inputs.SetNext(nil)
 
@@ -278,7 +278,7 @@ func initFilter() (err error) {
 
 func filterFrame(f *astiav.Frame, s *stream) (err error) {
 	// Add frame
-	if err = s.buffersrcContext.BuffersrcAddFrame(f, astiav.NewBuffersrcFlags(astiav.BuffersrcFlagKeepRef)); err != nil {
+	if err = s.buffersrcContext.AddFrame(f, astiav.NewBuffersrcFlags(astiav.BuffersrcFlagKeepRef)); err != nil {
 		err = fmt.Errorf("main: adding frame failed: %w", err)
 		return
 	}
@@ -289,7 +289,7 @@ func filterFrame(f *astiav.Frame, s *stream) (err error) {
 		s.filterFrame.Unref()
 
 		// Get frame
-		if err = s.buffersinkContext.BuffersinkGetFrame(s.filterFrame, astiav.NewBuffersinkFlags()); err != nil {
+		if err = s.buffersinkContext.GetFrame(s.filterFrame, astiav.NewBuffersinkFlags()); err != nil {
 			if errors.Is(err, astiav.ErrEof) || errors.Is(err, astiav.ErrEagain) {
 				err = nil
 				break
diff --git a/examples/frame_data_manipulation/main.go b/examples/frame_data_manipulation/main.go
new file mode 100644
index 0000000..e3778c3
--- /dev/null
+++ b/examples/frame_data_manipulation/main.go
@@ -0,0 +1,129 @@
+package main
+
+import (
+	"fmt"
+	"image"
+	"log"
+	"strings"
+
+	"github.com/asticode/go-astiav"
+)
+
+func main() {
+	// Handle ffmpeg logs
+	astiav.SetLogLevel(astiav.LogLevelDebug)
+	astiav.SetLogCallback(func(c astiav.Classer, l astiav.LogLevel, fmt, msg string) {
+		var cs string
+		if c != nil {
+			if cl := c.Class(); cl != nil {
+				cs = " - class: " + cl.String()
+			}
+		}
+		log.Printf("ffmpeg log: %s%s - level: %d\n", strings.TrimSpace(msg), cs, l)
+	})
+
+	/*
+
+		In this first part we're going to manipulate an audio frame
+
+	*/
+
+	// Alloc frame
+	audioFrame := astiav.AllocFrame()
+	defer audioFrame.Free()
+
+	// To write data manually into a frame, proper attributes need to be set and allocated
+	audioFrame.SetChannelLayout(astiav.ChannelLayoutStereo)
+	audioFrame.SetNbSamples(960)
+	audioFrame.SetSampleFormat(astiav.SampleFormatFlt)
+	audioFrame.SetSampleRate(48000)
+
+	// Alloc buffer
+	align := 0
+	if err := audioFrame.AllocBuffer(align); err != nil {
+		log.Fatal(fmt.Errorf("main: allocating buffer failed: %w", err))
+	}
+
+	// Alloc samples
+	if err := audioFrame.AllocSamples(align); err != nil {
+		log.Fatal(fmt.Errorf("main: allocating image failed: %w", err))
+	}
+
+	// When writing data manually into a frame, you need to make sure the frame is writable
+	if err := audioFrame.MakeWritable(); err != nil {
+		log.Fatal(fmt.Errorf("main: making frame writable failed: %w", err))
+	}
+
+	// Let's say b1 contains an actual audio buffer, we can update the audio frame's data based on the buffer
+	var b1 []byte
+	if err := audioFrame.Data().SetBytes(b1, align); err != nil {
+		log.Fatal(fmt.Errorf("main: setting frame's data based from bytes failed: %w", err))
+	}
+
+	// We can also retrieve the audio frame's data as buffer
+	if _, err := audioFrame.Data().Bytes(align); err != nil {
+		log.Fatal(fmt.Errorf("main: getting frame's data as bytes failed: %w", err))
+	}
+
+	/*
+
+		In this second part we're going to manipulate a video frame
+
+	*/
+
+	// Alloc frame
+	videoFrame := astiav.AllocFrame()
+	defer videoFrame.Free()
+
+	// To write data manually into a frame, proper attributes need to be set and allocated
+	videoFrame.SetHeight(256)
+	videoFrame.SetPixelFormat(astiav.PixelFormatRgba)
+	videoFrame.SetWidth(256)
+
+	// Alloc buffer
+	align = 1
+	if err := videoFrame.AllocBuffer(align); err != nil {
+		log.Fatal(fmt.Errorf("main: allocating buffer failed: %w", err))
+	}
+
+	// Alloc image
+	if err := videoFrame.AllocImage(align); err != nil {
+		log.Fatal(fmt.Errorf("main: allocating image failed: %w", err))
+	}
+
+	// When writing data manually into a frame, you need to make sure the frame is writable
+	if err := videoFrame.MakeWritable(); err != nil {
+		log.Fatal(fmt.Errorf("main: making frame writable failed: %w", err))
+	}
+
+	// Let's say b2 contains an actual video buffer, we can update the video frame's data based on the buffer
+	var b2 []byte
+	if err := videoFrame.Data().SetBytes(b2, align); err != nil {
+		log.Fatal(fmt.Errorf("main: setting frame's data based from bytes failed: %w", err))
+	}
+
+	// We can also retrieve the video frame's data as buffer
+	if _, err := videoFrame.Data().Bytes(align); err != nil {
+		log.Fatal(fmt.Errorf("main: getting frame's data as bytes failed: %w", err))
+	}
+
+	// Let's say i1 is an actual Go image.Image, we can update the video frame's data based on the image
+	var i1 image.Image
+	if err := videoFrame.Data().FromImage(i1); err != nil {
+		log.Fatal(fmt.Errorf("main: setting frame's data based on Go image failed: %w", err))
+	}
+
+	// We can also retrieve the video frame's data as a Go image
+	// For that we first need to guess the Go image format based on the frame's attributes before providing
+	// it to .ToImage(). You may not need this and can provide your own image.Image to .ToImage()
+	i2, err := videoFrame.Data().GuessImageFormat()
+	if err != nil {
+		log.Fatal(fmt.Errorf("main: guessing image format failed: %w", err))
+	}
+	if err := videoFrame.Data().ToImage(i2); err != nil {
+		log.Fatal(fmt.Errorf("main: getting frame's data as Go image failed: %w", err))
+	}
+
+	// Success
+	log.Println("success")
+}
diff --git a/examples/transcoding/main.go b/examples/transcoding/main.go
index 6eb40e4..f1024ba 100644
--- a/examples/transcoding/main.go
+++ b/examples/transcoding/main.go
@@ -25,8 +25,8 @@ var (
 )
 
 type stream struct {
-	buffersinkContext *astiav.FilterContext
-	buffersrcContext  *astiav.FilterContext
+	buffersinkContext *astiav.BuffersinkFilterContext
+	buffersrcContext  *astiav.BuffersrcFilterContext
 	decCodec          *astiav.Codec
 	decCodecContext   *astiav.CodecContext
 	decFrame          *astiav.Frame
@@ -395,24 +395,24 @@ func initFilters() (err error) {
 		}
 
 		// Create filter contexts
-		if s.buffersrcContext, err = s.filterGraph.NewFilterContext(buffersrc, "in", args); err != nil {
+		if s.buffersrcContext, err = s.filterGraph.NewBuffersrcFilterContext(buffersrc, "in", args); err != nil {
 			err = fmt.Errorf("main: creating buffersrc context failed: %w", err)
 			return
 		}
-		if s.buffersinkContext, err = s.filterGraph.NewFilterContext(buffersink, "out", nil); err != nil {
+		if s.buffersinkContext, err = s.filterGraph.NewBuffersinkFilterContext(buffersink, "out", nil); err != nil {
 			err = fmt.Errorf("main: creating buffersink context failed: %w", err)
 			return
 		}
 
 		// Update outputs
 		outputs.SetName("in")
-		outputs.SetFilterContext(s.buffersrcContext)
+		outputs.SetFilterContext(s.buffersrcContext.FilterContext())
 		outputs.SetPadIdx(0)
 		outputs.SetNext(nil)
 
 		// Update inputs
 		inputs.SetName("out")
-		inputs.SetFilterContext(s.buffersinkContext)
+		inputs.SetFilterContext(s.buffersinkContext.FilterContext())
 		inputs.SetPadIdx(0)
 		inputs.SetNext(nil)
 
@@ -441,7 +441,7 @@ func initFilters() (err error) {
 
 func filterEncodeWriteFrame(f *astiav.Frame, s *stream) (err error) {
 	// Add frame
-	if err = s.buffersrcContext.BuffersrcAddFrame(f, astiav.NewBuffersrcFlags(astiav.BuffersrcFlagKeepRef)); err != nil {
+	if err = s.buffersrcContext.AddFrame(f, astiav.NewBuffersrcFlags(astiav.BuffersrcFlagKeepRef)); err != nil {
 		err = fmt.Errorf("main: adding frame failed: %w", err)
 		return
 	}
@@ -452,7 +452,7 @@ func filterEncodeWriteFrame(f *astiav.Frame, s *stream) (err error) {
 		s.filterFrame.Unref()
 
 		// Get frame
-		if err = s.buffersinkContext.BuffersinkGetFrame(s.filterFrame, astiav.NewBuffersinkFlags()); err != nil {
+		if err = s.buffersinkContext.GetFrame(s.filterFrame, astiav.NewBuffersinkFlags()); err != nil {
 			if errors.Is(err, astiav.ErrEof) || errors.Is(err, astiav.ErrEagain) {
 				err = nil
 				break
diff --git a/filter_context.go b/filter_context.go
index ed8cb8d..d91361b 100644
--- a/filter_context.go
+++ b/filter_context.go
@@ -6,7 +6,6 @@ package astiav
 //#include <libavutil/frame.h>
 import "C"
 import (
-	"math"
 	"unsafe"
 )
 
@@ -27,50 +26,107 @@ func newFilterContext(c *C.AVFilterContext) *FilterContext {
 var _ Classer = (*FilterContext)(nil)
 
 func (fc *FilterContext) Free() {
-	classers.del(fc)
+	// Make sure to clone the classer before freeing the object since
+	// the C free method may reset the pointer
+	c := newClonedClasser(fc)
 	C.avfilter_free(fc.c)
+	// Make sure to remove from classers after freeing the object since
+	// the C free method may use methods needing the classer
+	if c != nil {
+		classers.del(c)
+	}
 }
 
-func (fc *FilterContext) BuffersrcAddFrame(f *Frame, fs BuffersrcFlags) error {
-	var cf *C.AVFrame
-	if f != nil {
-		cf = f.c
-	}
-	return newError(C.av_buffersrc_add_frame_flags(fc.c, cf, C.int(fs)))
+func (fc *FilterContext) Class() *Class {
+	return newClassFromC(unsafe.Pointer(fc.c))
+}
+
+type BuffersinkFilterContext struct {
+	fc *FilterContext
+}
+
+func newBuffersinkFilterContext(fc *FilterContext) *BuffersinkFilterContext {
+	return &BuffersinkFilterContext{fc: fc}
+}
+
+func (bfc *BuffersinkFilterContext) ChannelLayout() ChannelLayout {
+	var cl C.AVChannelLayout
+	C.av_buffersink_get_ch_layout(bfc.fc.c, &cl)
+	return newChannelLayoutFromC(&cl)
+}
+
+func (bfc *BuffersinkFilterContext) ColorRange() ColorRange {
+	return ColorRange(C.av_buffersink_get_color_range(bfc.fc.c))
+}
+
+func (bfc *BuffersinkFilterContext) ColorSpace() ColorSpace {
+	return ColorSpace(C.av_buffersink_get_colorspace(bfc.fc.c))
+}
+
+func (bfc *BuffersinkFilterContext) FilterContext() *FilterContext {
+	return bfc.fc
+}
+
+func (bfc *BuffersinkFilterContext) FrameRate() Rational {
+	return newRationalFromC(C.av_buffersink_get_frame_rate(bfc.fc.c))
 }
 
-func (fc *FilterContext) BuffersinkGetFrame(f *Frame, fs BuffersinkFlags) error {
+func (bfc *BuffersinkFilterContext) GetFrame(f *Frame, fs BuffersinkFlags) error {
 	var cf *C.AVFrame
 	if f != nil {
 		cf = f.c
 	}
-	return newError(C.av_buffersink_get_frame_flags(fc.c, cf, C.int(fs)))
+	return newError(C.av_buffersink_get_frame_flags(bfc.fc.c, cf, C.int(fs)))
 }
 
-func (fc *FilterContext) Class() *Class {
-	return newClassFromC(unsafe.Pointer(fc.c))
+func (bfc *BuffersinkFilterContext) Height() int {
+	return int(C.av_buffersink_get_h(bfc.fc.c))
 }
 
-func (fc *FilterContext) NbInputs() int {
-	return int(fc.c.nb_inputs)
+func (bfc *BuffersinkFilterContext) MediaType() MediaType {
+	return MediaType(C.av_buffersink_get_type(bfc.fc.c))
 }
 
-func (fc *FilterContext) NbOutputs() int {
-	return int(fc.c.nb_outputs)
+func (bfc *BuffersinkFilterContext) PixelFormat() PixelFormat {
+	return PixelFormat(C.av_buffersink_get_format(bfc.fc.c))
 }
 
-func (fc *FilterContext) Inputs() (ls []*FilterLink) {
-	lcs := (*[(math.MaxInt32 - 1) / unsafe.Sizeof((*C.AVFilterLink)(nil))](*C.AVFilterLink))(unsafe.Pointer(fc.c.inputs))
-	for i := 0; i < fc.NbInputs(); i++ {
-		ls = append(ls, newFilterLinkFromC(lcs[i]))
-	}
-	return
+func (bfc *BuffersinkFilterContext) SampleAspectRatio() Rational {
+	return newRationalFromC(C.av_buffersink_get_sample_aspect_ratio(bfc.fc.c))
+}
+
+func (bfc *BuffersinkFilterContext) SampleFormat() SampleFormat {
+	return SampleFormat(C.av_buffersink_get_format(bfc.fc.c))
+}
+
+func (bfc *BuffersinkFilterContext) SampleRate() int {
+	return int(C.av_buffersink_get_sample_rate(bfc.fc.c))
+}
+
+func (bfc *BuffersinkFilterContext) TimeBase() Rational {
+	return newRationalFromC(C.av_buffersink_get_time_base(bfc.fc.c))
+}
+
+func (bfc *BuffersinkFilterContext) Width() int {
+	return int(C.av_buffersink_get_w(bfc.fc.c))
+}
+
+type BuffersrcFilterContext struct {
+	fc *FilterContext
+}
+
+func newBuffersrcFilterContext(fc *FilterContext) *BuffersrcFilterContext {
+	return &BuffersrcFilterContext{fc: fc}
 }
 
-func (fc *FilterContext) Outputs() (ls []*FilterLink) {
-	lcs := (*[(math.MaxInt32 - 1) / unsafe.Sizeof((*C.AVFilterLink)(nil))](*C.AVFilterLink))(unsafe.Pointer(fc.c.outputs))
-	for i := 0; i < fc.NbOutputs(); i++ {
-		ls = append(ls, newFilterLinkFromC(lcs[i]))
+func (bfc *BuffersrcFilterContext) AddFrame(f *Frame, fs BuffersrcFlags) error {
+	var cf *C.AVFrame
+	if f != nil {
+		cf = f.c
 	}
-	return
+	return newError(C.av_buffersrc_add_frame_flags(bfc.fc.c, cf, C.int(fs)))
+}
+
+func (bfc *BuffersrcFilterContext) FilterContext() *FilterContext {
+	return bfc.fc
 }
diff --git a/filter_graph.go b/filter_graph.go
index abba8de..077e87d 100644
--- a/filter_graph.go
+++ b/filter_graph.go
@@ -10,6 +10,8 @@ import (
 // https://github.com/FFmpeg/FFmpeg/blob/n5.0/libavfilter/avfilter.h#L861
 type FilterGraph struct {
 	c *C.AVFilterGraph
+	// We need to store filter contexts to clean classer once filter graph is freed
+	fcs []*FilterContext
 }
 
 func newFilterGraphFromC(c *C.AVFilterGraph) *FilterGraph {
@@ -28,9 +30,25 @@ func AllocFilterGraph() *FilterGraph {
 }
 
 func (g *FilterGraph) Free() {
-	classers.del(g)
 	if g.c != nil {
+		// Make sure to clone the classer before freeing the object since
+		// the C free method may reset the pointer
+		c := newClonedClasser(g)
+		var cfcs []Classer
+		for _, fc := range g.fcs {
+			cfcs = append(cfcs, newClonedClasser(fc))
+		}
 		C.avfilter_graph_free(&g.c)
+		// Make sure to remove from classers after freeing the object since
+		// the C free method may use methods needing the classer
+		for _, cfc := range cfcs {
+			if cfc != nil {
+				classers.del(cfc)
+			}
+		}
+		if c != nil {
+			classers.del(c)
+		}
 	}
 }
 
@@ -80,7 +98,25 @@ func (g *FilterGraph) NewFilterContext(f *Filter, name string, args FilterArgs)
 	if err := newError(C.avfilter_graph_create_filter(&c, f.c, cn, ca, nil, g.c)); err != nil {
 		return nil, err
 	}
-	return newFilterContext(c), nil
+	fc := newFilterContext(c)
+	g.fcs = append(g.fcs, fc)
+	return fc, nil
+}
+
+func (g *FilterGraph) NewBuffersinkFilterContext(f *Filter, name string, args FilterArgs) (*BuffersinkFilterContext, error) {
+	fc, err := g.NewFilterContext(f, name, args)
+	if err != nil {
+		return nil, err
+	}
+	return newBuffersinkFilterContext(fc), nil
+}
+
+func (g *FilterGraph) NewBuffersrcFilterContext(f *Filter, name string, args FilterArgs) (*BuffersrcFilterContext, error) {
+	fc, err := g.NewFilterContext(f, name, args)
+	if err != nil {
+		return nil, err
+	}
+	return newBuffersrcFilterContext(fc), nil
 }
 
 func (g *FilterGraph) Parse(content string, inputs, outputs *FilterInOut) error {
diff --git a/filter_graph_test.go b/filter_graph_test.go
index 14dceee..8f4bd5f 100644
--- a/filter_graph_test.go
+++ b/filter_graph_test.go
@@ -31,13 +31,14 @@ func TestFilterGraph(t *testing.T) {
 		target    string
 		withError bool
 	}
-	type link struct {
+	type buffersink struct {
 		channelLayout     ChannelLayout
 		colorRange        ColorRange
 		colorSpace        ColorSpace
 		frameRate         Rational
 		height            int
 		mediaType         MediaType
+		name              string
 		pixelFormat       PixelFormat
 		sampleAspectRatio Rational
 		sampleFormat      SampleFormat
@@ -45,30 +46,32 @@ func TestFilterGraph(t *testing.T) {
 		timeBase          Rational
 		width             int
 	}
+	type buffersrc struct {
+		name string
+	}
 	type graph struct {
-		buffersinkExpectedInput link
-		buffersinkName          string
-		buffersrcName           string
-		commands                []command
-		content                 string
-		s                       string
-		sources                 []FilterArgs
+		buffersink buffersink
+		buffersrc  buffersrc
+		commands   []command
+		content    string
+		s          string
+		sources    []FilterArgs
 	}
 	for _, v := range []graph{
 		{
-			buffersinkExpectedInput: link{
+			buffersink: buffersink{
 				colorRange:        ColorRangeUnspecified,
 				colorSpace:        ColorSpaceUnspecified,
 				frameRate:         NewRational(4, 1),
 				height:            8,
 				mediaType:         MediaTypeVideo,
+				name:              "buffersink",
 				pixelFormat:       PixelFormatYuv420P,
 				sampleAspectRatio: NewRational(2, 1),
 				timeBase:          NewRational(1, 4),
 				width:             4,
 			},
-			buffersinkName: "buffersink",
-			buffersrcName:  "buffer",
+			buffersrc: buffersrc{name: "buffer"},
 			commands: []command{
 				{
 					args:      "a",
@@ -97,17 +100,17 @@ func TestFilterGraph(t *testing.T) {
 			},
 		},
 		{
-			buffersinkExpectedInput: link{
+			buffersink: buffersink{
 				channelLayout: ChannelLayoutStereo,
 				mediaType:     MediaTypeAudio,
+				name:          "abuffersink",
 				sampleFormat:  SampleFormatS16,
 				sampleRate:    3,
 				timeBase:      NewRational(1, 4),
 			},
-			buffersinkName: "abuffersink",
-			buffersrcName:  "abuffer",
-			content:        "[input_1]aformat=sample_fmts=s16:channel_layouts=stereo:sample_rates=3,asettb=1/4",
-			s:              "                                                  +---------------+\nParsed_asettb_1:default--[3Hz s16:stereo]--default|  filter_out   |\n                                                  | (abuffersink) |\n                                                  +---------------+\n\n+-------------+\n| filter_in_1 |default--[2Hz fltp:mono]--auto_aresample_0:default\n|  (abuffer)  |\n+-------------+\n\n                                                   +------------------+\nauto_aresample_0:default--[3Hz s16:stereo]--default| Parsed_aformat_0 |default--[3Hz s16:stereo]--Parsed_asettb_1:default\n                                                   |    (aformat)     |\n                                                   +------------------+\n\n                                                   +-----------------+\nParsed_aformat_0:default--[3Hz s16:stereo]--default| Parsed_asettb_1 |default--[3Hz s16:stereo]--filter_out:default\n                                                   |    (asettb)     |\n                                                   +-----------------+\n\n                                             +------------------+\nfilter_in_1:default--[2Hz fltp:mono]--default| auto_aresample_0 |default--[3Hz s16:stereo]--Parsed_aformat_0:default\n                                             |   (aresample)    |\n                                             +------------------+\n\n",
+			buffersrc: buffersrc{name: "abuffer"},
+			content:   "[input_1]aformat=sample_fmts=s16:channel_layouts=stereo:sample_rates=3,asettb=1/4",
+			s:         "                                                  +---------------+\nParsed_asettb_1:default--[3Hz s16:stereo]--default|  filter_out   |\n                                                  | (abuffersink) |\n                                                  +---------------+\n\n+-------------+\n| filter_in_1 |default--[2Hz fltp:mono]--auto_aresample_0:default\n|  (abuffer)  |\n+-------------+\n\n                                                   +------------------+\nauto_aresample_0:default--[3Hz s16:stereo]--default| Parsed_aformat_0 |default--[3Hz s16:stereo]--Parsed_asettb_1:default\n                                                   |    (aformat)     |\n                                                   +------------------+\n\n                                                   +-----------------+\nParsed_aformat_0:default--[3Hz s16:stereo]--default| Parsed_asettb_1 |default--[3Hz s16:stereo]--filter_out:default\n                                                   |    (asettb)     |\n                                                   +-----------------+\n\n                                             +------------------+\nfilter_in_1:default--[2Hz fltp:mono]--default| auto_aresample_0 |default--[3Hz s16:stereo]--Parsed_aformat_0:default\n                                             |   (aresample)    |\n                                             +------------------+\n\n",
 			sources: []FilterArgs{
 				{
 					"channel_layout": ChannelLayoutMono.String(),
@@ -122,21 +125,21 @@ func TestFilterGraph(t *testing.T) {
 		require.NotNil(t, fg)
 		defer fg.Free()
 
-		buffersrc := FindFilterByName(v.buffersrcName)
+		buffersrc := FindFilterByName(v.buffersrc.name)
 		require.NotNil(t, buffersrc)
-		buffersink := FindFilterByName(v.buffersinkName)
+		buffersink := FindFilterByName(v.buffersink.name)
 		require.NotNil(t, buffersink)
 
-		buffersinkContext, err := fg.NewFilterContext(buffersink, "filter_out", nil)
+		buffersinkContext, err := fg.NewBuffersinkFilterContext(buffersink, "filter_out", nil)
 		require.NoError(t, err)
-		cl = buffersinkContext.Class()
+		cl = buffersinkContext.FilterContext().Class()
 		require.NotNil(t, cl)
 		require.Equal(t, "AVFilter", cl.Name())
 
 		inputs := AllocFilterInOut()
 		defer inputs.Free()
 		inputs.SetName("out")
-		inputs.SetFilterContext(buffersinkContext)
+		inputs.SetFilterContext(buffersinkContext.FilterContext())
 		inputs.SetPadIdx(0)
 		inputs.SetNext(nil)
 
@@ -147,15 +150,15 @@ func TestFilterGraph(t *testing.T) {
 			}
 		}()
 
-		var buffersrcContexts []*FilterContext
+		var buffersrcContexts []*BuffersrcFilterContext
 		for idx, src := range v.sources {
-			buffersrcContext, err := fg.NewFilterContext(buffersrc, fmt.Sprintf("filter_in_%d", idx+1), src)
+			buffersrcContext, err := fg.NewBuffersrcFilterContext(buffersrc, fmt.Sprintf("filter_in_%d", idx+1), src)
 			require.NoError(t, err)
 			buffersrcContexts = append(buffersrcContexts, buffersrcContext)
 
 			o := AllocFilterInOut()
 			o.SetName(fmt.Sprintf("input_%d", idx+1))
-			o.SetFilterContext(buffersrcContext)
+			o.SetFilterContext(buffersrcContext.FilterContext())
 			o.SetPadIdx(0)
 			o.SetNext(outputs)
 
@@ -165,33 +168,21 @@ func TestFilterGraph(t *testing.T) {
 		require.NoError(t, fg.Parse(v.content, inputs, outputs))
 		require.NoError(t, fg.Configure())
 
-		require.Equal(t, 1, buffersinkContext.NbInputs())
-		links := buffersinkContext.Inputs()
-		require.Equal(t, 1, len(links))
-		e, g := v.buffersinkExpectedInput, links[0]
-		require.Equal(t, e.frameRate, g.FrameRate())
-		require.Equal(t, e.mediaType, g.MediaType())
-		require.Equal(t, e.timeBase, g.TimeBase())
-		switch e.mediaType {
+		require.Equal(t, v.buffersink.frameRate, buffersinkContext.FrameRate())
+		require.Equal(t, v.buffersink.mediaType, buffersinkContext.MediaType())
+		require.Equal(t, v.buffersink.timeBase, buffersinkContext.TimeBase())
+		switch v.buffersink.mediaType {
 		case MediaTypeAudio:
-			require.True(t, e.channelLayout.Equal(g.ChannelLayout()))
-			require.Equal(t, e.sampleFormat, g.SampleFormat())
-			require.Equal(t, e.sampleRate, g.SampleRate())
+			require.True(t, v.buffersink.channelLayout.Equal(buffersinkContext.ChannelLayout()))
+			require.Equal(t, v.buffersink.sampleFormat, buffersinkContext.SampleFormat())
+			require.Equal(t, v.buffersink.sampleRate, buffersinkContext.SampleRate())
 		default:
-			require.Equal(t, e.colorRange, g.ColorRange())
-			require.Equal(t, e.colorSpace, g.ColorSpace())
-			require.Equal(t, e.height, g.Height())
-			require.Equal(t, e.pixelFormat, g.PixelFormat())
-			require.Equal(t, e.sampleAspectRatio, g.SampleAspectRatio())
-			require.Equal(t, e.width, g.Width())
-		}
-
-		for _, buffersrcContext := range buffersrcContexts {
-			require.Equal(t, 0, buffersrcContext.NbInputs())
-			require.Equal(t, 1, buffersrcContext.NbOutputs())
-			links := buffersrcContext.Outputs()
-			require.Equal(t, 1, len(links))
-			require.Equal(t, v.buffersinkExpectedInput.mediaType, links[0].MediaType())
+			require.Equal(t, v.buffersink.colorRange, buffersinkContext.ColorRange())
+			require.Equal(t, v.buffersink.colorSpace, buffersinkContext.ColorSpace())
+			require.Equal(t, v.buffersink.height, buffersinkContext.Height())
+			require.Equal(t, v.buffersink.pixelFormat, buffersinkContext.PixelFormat())
+			require.Equal(t, v.buffersink.sampleAspectRatio, buffersinkContext.SampleAspectRatio())
+			require.Equal(t, v.buffersink.width, buffersinkContext.Width())
 		}
 
 		require.Equal(t, v.s, fg.String())
diff --git a/filter_link.go b/filter_link.go
deleted file mode 100644
index a94929c..0000000
--- a/filter_link.go
+++ /dev/null
@@ -1,65 +0,0 @@
-package astiav
-
-//#include <libavfilter/avfilter.h>
-import "C"
-
-// https://github.com/FFmpeg/FFmpeg/blob/n5.0/libavfilter/avfilter.h#L471
-type FilterLink struct {
-	c *C.AVFilterLink
-}
-
-func newFilterLinkFromC(c *C.AVFilterLink) *FilterLink {
-	if c == nil {
-		return nil
-	}
-	return &FilterLink{c: c}
-}
-
-func (l *FilterLink) ChannelLayout() ChannelLayout {
-	v, _ := newChannelLayoutFromC(&l.c.ch_layout).clone()
-	return v
-}
-
-func (l *FilterLink) ColorRange() ColorRange {
-	return ColorRange(l.c.color_range)
-}
-
-func (l *FilterLink) ColorSpace() ColorSpace {
-	return ColorSpace(l.c.colorspace)
-}
-
-func (l *FilterLink) FrameRate() Rational {
-	return newRationalFromC(l.c.frame_rate)
-}
-
-func (l *FilterLink) Height() int {
-	return int(l.c.h)
-}
-
-func (l *FilterLink) MediaType() MediaType {
-	return MediaType(l.c._type)
-}
-
-func (l *FilterLink) PixelFormat() PixelFormat {
-	return PixelFormat(l.c.format)
-}
-
-func (l *FilterLink) SampleAspectRatio() Rational {
-	return newRationalFromC(l.c.sample_aspect_ratio)
-}
-
-func (l *FilterLink) SampleFormat() SampleFormat {
-	return SampleFormat(l.c.format)
-}
-
-func (l *FilterLink) SampleRate() int {
-	return int(l.c.sample_rate)
-}
-
-func (l *FilterLink) TimeBase() Rational {
-	return newRationalFromC(l.c.time_base)
-}
-
-func (l *FilterLink) Width() int {
-	return int(l.c.w)
-}
diff --git a/format_context.go b/format_context.go
index f8dacfd..c41d2e1 100644
--- a/format_context.go
+++ b/format_context.go
@@ -51,8 +51,15 @@ func AllocOutputFormatContext(of *OutputFormat, formatName, filename string) (*F
 }
 
 func (fc *FormatContext) Free() {
-	classers.del(fc)
+	// Make sure to clone the classer before freeing the object since
+	// the C free method may reset the pointer
+	c := newClonedClasser(fc)
 	C.avformat_free_context(fc.c)
+	// Make sure to remove from classers after freeing the object since
+	// the C free method may use methods needing the classer
+	if c != nil {
+		classers.del(c)
+	}
 }
 
 func (fc *FormatContext) BitRate() int64 {
@@ -192,12 +199,23 @@ func (fc *FormatContext) OpenInput(url string, fmt *InputFormat, d *Dictionary)
 }
 
 func (fc *FormatContext) CloseInput() {
-	if pb := fc.Pb(); pb != nil {
-		classers.del(pb)
-	}
-	classers.del(fc)
 	if fc.c != nil {
+		// Make sure to clone the classer before freeing the object since
+		// the C free method may reset the pointer
+		c := newClonedClasser(fc)
+		var cpb Classer
+		if pb := fc.Pb(); pb != nil {
+			cpb = newClonedClasser(pb)
+		}
 		C.avformat_close_input(&fc.c)
+		// Make sure to remove from classers after freeing the object since
+		// the C free method may use methods needing the classer
+		if cpb != nil {
+			classers.del(cpb)
+		}
+		if c != nil {
+			classers.del(c)
+		}
 	}
 }
 
diff --git a/format_context_test.go b/format_context_test.go
index bbe0616..f816fe2 100644
--- a/format_context_test.go
+++ b/format_context_test.go
@@ -7,7 +7,7 @@ import (
 )
 
 func TestFormatContext(t *testing.T) {
-	fc1, err := globalHelper.inputFormatContext("video.mp4")
+	fc1, err := globalHelper.inputFormatContext("video.mp4", nil)
 	require.NoError(t, err)
 	ss := fc1.Streams()
 	require.Len(t, ss, 2)
diff --git a/frame.c b/frame.c
new file mode 100644
index 0000000..74b3916
--- /dev/null
+++ b/frame.c
@@ -0,0 +1,22 @@
+#include <errno.h>
+#include <libavutil/avutil.h>
+#include <libavutil/samplefmt.h>
+#include <stdint.h>
+#include <string.h>
+
+int astiavSamplesCopyToBuffer(uint8_t* dst, int dst_size, const uint8_t * const src_data[8], int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align) {
+    int linesize, buffer_size, nb_planes, i;
+    
+    buffer_size = av_samples_get_buffer_size(&linesize, nb_channels, nb_samples, sample_fmt, align);
+    if (buffer_size > dst_size || buffer_size < 0) return AVERROR(EINVAL);
+
+    nb_planes = buffer_size / linesize;
+
+    for (i = 0; i < nb_planes; i++) {
+        const uint8_t *src = src_data[i];
+        memcpy(dst, src, linesize);
+        dst += linesize;
+        src += linesize;
+    }
+    return buffer_size;
+}
\ No newline at end of file
diff --git a/frame.go b/frame.go
index ee91c15..f50a493 100644
--- a/frame.go
+++ b/frame.go
@@ -5,6 +5,7 @@ package astiav
 //#include <libavutil/imgutils.h>
 //#include <libavutil/samplefmt.h>
 //#include <libavutil/hwcontext.h>
+//#include "frame.h"
 import "C"
 import (
 	"unsafe"
@@ -98,7 +99,7 @@ func (f *Frame) SetKeyFrame(k bool) {
 }
 
 func (f *Frame) ImageBufferSize(align int) (int, error) {
-	ret := C.av_image_get_buffer_size((C.enum_AVSampleFormat)(f.c.format), f.c.width, f.c.height, C.int(align))
+	ret := C.av_image_get_buffer_size((C.enum_AVPixelFormat)(f.c.format), f.c.width, f.c.height, C.int(align))
 	if err := newError(ret); err != nil {
 		return 0, err
 	}
@@ -106,7 +107,7 @@ func (f *Frame) ImageBufferSize(align int) (int, error) {
 }
 
 func (f *Frame) ImageCopyToBuffer(b []byte, align int) (int, error) {
-	ret := C.av_image_copy_to_buffer((*C.uint8_t)(unsafe.Pointer(&b[0])), C.int(len(b)), &f.c.data[0], &f.c.linesize[0], (C.enum_AVSampleFormat)(f.c.format), f.c.width, f.c.height, C.int(align))
+	ret := C.av_image_copy_to_buffer((*C.uint8_t)(unsafe.Pointer(&b[0])), C.int(len(b)), &f.c.data[0], &f.c.linesize[0], (C.enum_AVPixelFormat)(f.c.format), f.c.width, f.c.height, C.int(align))
 	if err := newError(ret); err != nil {
 		return 0, err
 	}
@@ -121,6 +122,26 @@ func (f *Frame) ImageFillBlack() error {
 	return newError(C.av_image_fill_black(&f.c.data[0], &linesize[0], (C.enum_AVPixelFormat)(f.c.format), (C.enum_AVColorRange)(f.c.color_range), f.c.width, f.c.height))
 }
 
+func (f *Frame) SamplesBufferSize(align int) (int, error) {
+	ret := C.av_samples_get_buffer_size(nil, f.c.ch_layout.nb_channels, f.c.nb_samples, (C.enum_AVSampleFormat)(f.c.format), C.int(align))
+	if err := newError(ret); err != nil {
+		return 0, err
+	}
+	return int(ret), nil
+}
+
+func (f *Frame) SamplesCopyToBuffer(b []byte, align int) (int, error) {
+	ret := C.astiavSamplesCopyToBuffer((*C.uint8_t)(unsafe.Pointer(&b[0])), C.int(len(b)), &f.c.data[0], f.c.ch_layout.nb_channels, f.c.nb_samples, (C.enum_AVSampleFormat)(f.c.format), C.int(align))
+	if err := newError(ret); err != nil {
+		return 0, err
+	}
+	return int(ret), nil
+}
+
+func (f *Frame) SamplesFillSilence() error {
+	return newError(C.av_samples_set_silence(&f.c.data[0], 0, f.c.nb_samples, f.c.ch_layout.nb_channels, (C.enum_AVSampleFormat)(f.c.format)))
+}
+
 func (f *Frame) Linesize() [NumDataPointers]int {
 	o := [NumDataPointers]int{}
 	for i := 0; i < int(NumDataPointers); i++ {
@@ -232,3 +253,11 @@ func (f *Frame) MoveRef(src *Frame) {
 func (f *Frame) UnsafePointer() unsafe.Pointer {
 	return unsafe.Pointer(f.c)
 }
+
+func (f *Frame) IsWritable() bool {
+	return C.av_frame_is_writable(f.c) > 0
+}
+
+func (f *Frame) MakeWritable() error {
+	return newError(C.av_frame_make_writable(f.c))
+}
diff --git a/frame.h b/frame.h
new file mode 100644
index 0000000..88fbcc3
--- /dev/null
+++ b/frame.h
@@ -0,0 +1,4 @@
+#include <libavutil/samplefmt.h>
+#include <stdint.h>
+
+int astiavSamplesCopyToBuffer(uint8_t* dst, int dst_size, const uint8_t * const src_data[8], int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align);
\ No newline at end of file
diff --git a/frame_data.go b/frame_data.go
index 2571b05..3216526 100644
--- a/frame_data.go
+++ b/frame_data.go
@@ -1,6 +1,8 @@
 package astiav
 
 //#include <libavutil/imgutils.h>
+//#include <libavutil/samplefmt.h>
+//#include <stdlib.h>
 //#include "macros.h"
 import "C"
 import (
@@ -8,6 +10,7 @@ import (
 	"fmt"
 	"image"
 	"strings"
+	"unsafe"
 )
 
 type FrameData struct {
@@ -16,9 +19,10 @@ type FrameData struct {
 
 type frameDataFramer interface {
 	bytes(align int) ([]byte, error)
+	copyPlanes(ps []frameDataPlane) error
 	height() int
 	pixelFormat() PixelFormat
-	planes() ([]frameDataPlane, error)
+	planes(b []byte, align int) ([]frameDataPlane, error)
 	width() int
 }
 
@@ -35,6 +39,21 @@ func (d *FrameData) Bytes(align int) ([]byte, error) {
 	return d.f.bytes(align)
 }
 
+// It's the developer's responsibility to handle frame's writability
+func (d *FrameData) SetBytes(b []byte, align int) error {
+	// Get planes
+	planes, err := d.f.planes(b, align)
+	if err != nil {
+		return fmt.Errorf("astiav: getting planes failed: %w", err)
+	}
+
+	// Copy planes
+	if err := d.f.copyPlanes(planes); err != nil {
+		return fmt.Errorf("astiav: copying planes failed: %w", err)
+	}
+	return nil
+}
+
 // Always returns non-premultiplied formats when dealing with alpha channels, however this might not
 // always be accurate. In this case, use your own format in .ToImage()
 func (d *FrameData) GuessImageFormat() (image.Image, error) {
@@ -118,41 +137,113 @@ func (d *FrameData) toImageYCbCrA(y, cb, cr, a *[]uint8, yStride, cStride, aStri
 }
 
 func (d *FrameData) ToImage(dst image.Image) error {
+	// Get bytes
+	// Using bytesFromC on f.c.data caused random segfaults
+	const align = 1
+	b, err := d.f.bytes(align)
+	if err != nil {
+		return fmt.Errorf("astiav: getting bytes failed: %w", err)
+	}
+
 	// Get planes
-	planes, err := d.f.planes()
+	planes, err := d.f.planes(b, align)
 	if err != nil {
 		return fmt.Errorf("astiav: getting planes failed: %w", err)
 	}
 
 	// Update image
-	if v, ok := dst.(*image.Alpha); ok {
+	switch v := dst.(type) {
+	case *image.Alpha:
 		d.toImagePix(&v.Pix, &v.Stride, &v.Rect, planes)
-	} else if v, ok := dst.(*image.Alpha16); ok {
+	case *image.Alpha16:
 		d.toImagePix(&v.Pix, &v.Stride, &v.Rect, planes)
-	} else if v, ok := dst.(*image.CMYK); ok {
+	case *image.CMYK:
 		d.toImagePix(&v.Pix, &v.Stride, &v.Rect, planes)
-	} else if v, ok := dst.(*image.Gray); ok {
+	case *image.Gray:
 		d.toImagePix(&v.Pix, &v.Stride, &v.Rect, planes)
-	} else if v, ok := dst.(*image.Gray16); ok {
+	case *image.Gray16:
 		d.toImagePix(&v.Pix, &v.Stride, &v.Rect, planes)
-	} else if v, ok := dst.(*image.NRGBA); ok {
+	case *image.NRGBA:
 		d.toImagePix(&v.Pix, &v.Stride, &v.Rect, planes)
-	} else if v, ok := dst.(*image.NRGBA64); ok {
+	case *image.NRGBA64:
 		d.toImagePix(&v.Pix, &v.Stride, &v.Rect, planes)
-	} else if v, ok := dst.(*image.NYCbCrA); ok {
+	case *image.NYCbCrA:
 		d.toImageYCbCrA(&v.Y, &v.Cb, &v.Cr, &v.A, &v.YStride, &v.CStride, &v.AStride, &v.SubsampleRatio, &v.Rect, planes)
-	} else if v, ok := dst.(*image.RGBA); ok {
+	case *image.RGBA:
 		d.toImagePix(&v.Pix, &v.Stride, &v.Rect, planes)
-	} else if v, ok := dst.(*image.RGBA64); ok {
+	case *image.RGBA64:
 		d.toImagePix(&v.Pix, &v.Stride, &v.Rect, planes)
-	} else if v, ok := dst.(*image.YCbCr); ok {
+	case *image.YCbCr:
 		d.toImageYCbCr(&v.Y, &v.Cb, &v.Cr, &v.YStride, &v.CStride, &v.SubsampleRatio, &v.Rect, planes)
-	} else {
+	default:
 		return errors.New("astiav: image format is not handled")
 	}
 	return nil
 }
 
+func (d *FrameData) fromImagePix(pix []uint8, stride int) error {
+	// Copy planes
+	if err := d.f.copyPlanes([]frameDataPlane{{bytes: pix, linesize: stride}}); err != nil {
+		return fmt.Errorf("astiav: copying planes failed: %w", err)
+	}
+	return nil
+}
+
+func (d *FrameData) fromImageYCbCr(y, cb, cr []uint8, yStride, cStride int) error {
+	// Copy planes
+	if err := d.f.copyPlanes([]frameDataPlane{
+		{bytes: y, linesize: yStride},
+		{bytes: cb, linesize: cStride},
+		{bytes: cr, linesize: cStride},
+	}); err != nil {
+		return fmt.Errorf("astiav: copying planes failed: %w", err)
+	}
+	return nil
+}
+
+func (d *FrameData) fromImageYCbCrA(y, cb, cr, a []uint8, yStride, cStride, aStride int) error {
+	// Copy planes
+	if err := d.f.copyPlanes([]frameDataPlane{
+		{bytes: y, linesize: yStride},
+		{bytes: cb, linesize: cStride},
+		{bytes: cr, linesize: cStride},
+		{bytes: a, linesize: aStride},
+	}); err != nil {
+		return fmt.Errorf("astiav: copying planes failed: %w", err)
+	}
+	return nil
+}
+
+// It's the developer's responsibility to handle frame's writability
+func (d *FrameData) FromImage(src image.Image) error {
+	// Copy planes
+	switch v := src.(type) {
+	case *image.Alpha:
+		return d.fromImagePix(v.Pix, v.Stride)
+	case *image.Alpha16:
+		return d.fromImagePix(v.Pix, v.Stride)
+	case *image.CMYK:
+		return d.fromImagePix(v.Pix, v.Stride)
+	case *image.Gray:
+		return d.fromImagePix(v.Pix, v.Stride)
+	case *image.Gray16:
+		return d.fromImagePix(v.Pix, v.Stride)
+	case *image.NRGBA:
+		return d.fromImagePix(v.Pix, v.Stride)
+	case *image.NRGBA64:
+		return d.fromImagePix(v.Pix, v.Stride)
+	case *image.NYCbCrA:
+		return d.fromImageYCbCrA(v.Y, v.Cb, v.Cr, v.A, v.YStride, v.CStride, v.AStride)
+	case *image.RGBA:
+		return d.fromImagePix(v.Pix, v.Stride)
+	case *image.RGBA64:
+		return d.fromImagePix(v.Pix, v.Stride)
+	case *image.YCbCr:
+		return d.fromImageYCbCr(v.Y, v.Cb, v.Cr, v.YStride, v.CStride)
+	}
+	return errors.New("astiav: image format is not handled")
+}
+
 var _ frameDataFramer = (*frameDataFrame)(nil)
 
 type frameDataFrame struct {
@@ -164,94 +255,162 @@ func newFrameDataFrame(f *Frame) *frameDataFrame {
 }
 
 func (f *frameDataFrame) bytes(align int) ([]byte, error) {
-	switch {
-	// Video
-	case f.height() > 0 && f.width() > 0:
-		// Get buffer size
-		s, err := f.f.ImageBufferSize(align)
-		if err != nil {
-			return nil, fmt.Errorf("astiav: getting image buffer size failed: %w", err)
-		}
+	// Get funcs
+	var bufferSizeFunc func(int) (int, error)
+	var copyToBufferFunc func([]byte, int) (int, error)
+	switch f.mediaType() {
+	case MediaTypeAudio:
+		bufferSizeFunc = f.f.SamplesBufferSize
+		copyToBufferFunc = f.f.SamplesCopyToBuffer
+	case MediaTypeVideo:
+		bufferSizeFunc = f.f.ImageBufferSize
+		copyToBufferFunc = f.f.ImageCopyToBuffer
+	default:
+		return nil, errors.New("astiav: media type not implemented")
+	}
 
-		// Invalid buffer size
-		if s == 0 {
-			return nil, errors.New("astiav: invalid image buffer size")
-		}
+	// Get buffer size
+	s, err := bufferSizeFunc(align)
+	if err != nil {
+		return nil, fmt.Errorf("astiav: getting buffer size failed: %w", err)
+	}
+
+	// Invalid buffer size
+	if s == 0 {
+		return nil, errors.New("astiav: invalid buffer size")
+	}
 
-		// Create buffer
-		b := make([]byte, s)
+	// Create buffer
+	b := make([]byte, s)
 
-		// Copy image to buffer
-		if _, err = f.f.ImageCopyToBuffer(b, align); err != nil {
-			return nil, fmt.Errorf("astiav: copying image to buffer failed: %w", err)
+	// Copy to buffer
+	if _, err = copyToBufferFunc(b, align); err != nil {
+		return nil, fmt.Errorf("astiav: copying to buffer failed: %w", err)
+	}
+	return b, nil
+}
+
+func (f *frameDataFrame) copyPlanes(ps []frameDataPlane) error {
+	// Check writability
+	if !f.f.IsWritable() {
+		return errors.New("astiav: frame is not writable")
+	}
+
+	// Prepare data
+	var cdata [8]*C.uint8_t
+	var clinesizes [8]C.int
+	for i, p := range ps {
+		// Convert data
+		if len(p.bytes) > 0 {
+			cdata[i] = (*C.uint8_t)(C.CBytes(p.bytes))
+			defer C.free(unsafe.Pointer(cdata[i]))
 		}
-		return b, nil
+
+		// Convert linesize
+		clinesizes[i] = C.int(p.linesize)
+	}
+
+	// Copy data
+	switch f.mediaType() {
+	case MediaTypeAudio:
+		C.av_samples_copy(&f.f.c.data[0], &cdata[0], 0, 0, f.f.c.nb_samples, f.f.c.ch_layout.nb_channels, (C.enum_AVSampleFormat)(f.f.c.format))
+	case MediaTypeVideo:
+		C.av_image_copy(&f.f.c.data[0], &f.f.c.linesize[0], &cdata[0], &clinesizes[0], (C.enum_AVPixelFormat)(f.f.c.format), f.f.c.width, f.f.c.height)
+	default:
+		return errors.New("astiav: media type not implemented")
 	}
-	return nil, errors.New("astiav: frame type not implemented")
+	return nil
 }
 
 func (f *frameDataFrame) height() int {
 	return f.f.Height()
 }
 
+func (f *frameDataFrame) mediaType() MediaType {
+	switch {
+	// Audio
+	case f.f.NbSamples() > 0:
+		return MediaTypeAudio
+	// Video
+	case f.f.Height() > 0 && f.f.Width() > 0:
+		return MediaTypeVideo
+	default:
+		return MediaTypeUnknown
+	}
+}
+
 func (f *frameDataFrame) pixelFormat() PixelFormat {
 	return f.f.PixelFormat()
 }
 
-// Using bytesFromC on f.c.data caused random segfaults
-func (f *frameDataFrame) planes() ([]frameDataPlane, error) {
-	// Get bytes
-	const align = 1
-	b, err := f.bytes(align)
-	if err != nil {
-		return nil, fmt.Errorf("astiav: getting bytes failed: %w", err)
-	}
+func (f *frameDataFrame) planes(b []byte, align int) ([]frameDataPlane, error) {
+	// Get line and plane sizes
+	var linesizes [8]int
+	var planeSizes [8]int
+	switch f.mediaType() {
+	case MediaTypeAudio:
+		// Get buffer size
+		var cLinesize C.int
+		cBufferSize := C.av_samples_get_buffer_size(&cLinesize, f.f.c.ch_layout.nb_channels, f.f.c.nb_samples, (C.enum_AVSampleFormat)(f.f.c.format), C.int(align))
+		if err := newError(cBufferSize); err != nil {
+			return nil, fmt.Errorf("astiav: getting buffer size failed: %w", err)
+		}
 
-	switch {
-	// Video
-	case f.height() > 0 && f.width() > 0:
+		// Update line and plane sizes
+		for i := 0; i < int(cBufferSize/cLinesize); i++ {
+			linesizes[i] = int(cLinesize)
+			planeSizes[i] = int(cLinesize)
+		}
+	case MediaTypeVideo:
 		// Below is mostly inspired by https://github.com/FFmpeg/FFmpeg/blob/n5.1.2/libavutil/imgutils.c#L466
 
 		// Get linesize
-		var linesize [4]C.int
-		if err := newError(C.av_image_fill_linesizes(&linesize[0], (C.enum_AVPixelFormat)(f.f.c.format), f.f.c.width)); err != nil {
+		var cLinesizes [8]C.int
+		if err := newError(C.av_image_fill_linesizes(&cLinesizes[0], (C.enum_AVPixelFormat)(f.f.c.format), f.f.c.width)); err != nil {
 			return nil, fmt.Errorf("astiav: getting linesize failed: %w", err)
 		}
 
 		// Align linesize
-		var alignedLinesize [4]C.ptrdiff_t
+		var cAlignedLinesizes [8]C.ptrdiff_t
 		for i := 0; i < 4; i++ {
-			alignedLinesize[i] = C.astiavFFAlign(linesize[i], C.int(align))
+			cAlignedLinesizes[i] = C.astiavFFAlign(cLinesizes[i], C.int(align))
 		}
 
 		// Get plane sizes
-		var planeSizes [4]C.size_t
-		if err := newError(C.av_image_fill_plane_sizes(&planeSizes[0], (C.enum_AVPixelFormat)(f.f.c.format), f.f.c.height, &alignedLinesize[0])); err != nil {
+		var cPlaneSizes [8]C.size_t
+		if err := newError(C.av_image_fill_plane_sizes(&cPlaneSizes[0], (C.enum_AVPixelFormat)(f.f.c.format), f.f.c.height, &cAlignedLinesizes[0])); err != nil {
 			return nil, fmt.Errorf("astiav: getting plane sizes failed: %w", err)
 		}
 
-		// Loop through plane sizes
-		var ps []frameDataPlane
-		start := 0
-		for idx, planeSize := range planeSizes {
-			// Get end
-			end := start + int(planeSize)
-			if len(b) < end {
-				return nil, fmt.Errorf("astiav: buffer length %d is invalid for [%d:%d]", len(b), start, end)
-			}
-
-			// Append plane
-			ps = append(ps, frameDataPlane{
-				bytes:    b[start:end],
-				linesize: int(alignedLinesize[idx]),
-			})
-
-			// Update start
-			start += int(planeSize)
+		// Update line and plane sizes
+		for i := range cPlaneSizes {
+			linesizes[i] = int(cAlignedLinesizes[i])
+			planeSizes[i] = int(cPlaneSizes[i])
+		}
+	default:
+		return nil, errors.New("astiav: media type not implemented")
+	}
+
+	// Loop through plane sizes
+	var ps []frameDataPlane
+	start := 0
+	for i := range planeSizes {
+		// Get end
+		end := start + planeSizes[i]
+		if len(b) < end {
+			return nil, fmt.Errorf("astiav: buffer length %d is invalid for [%d:%d]", len(b), start, end)
 		}
-		return ps, nil
+
+		// Append plane
+		ps = append(ps, frameDataPlane{
+			bytes:    b[start:end],
+			linesize: linesizes[i],
+		})
+
+		// Update start
+		start = end
 	}
-	return nil, errors.New("astiav: frame type not implemented")
+	return ps, nil
 }
 
 func (f *frameDataFrame) width() int {
diff --git a/frame_data_test.go b/frame_data_test.go
index a44dee4..7739e52 100644
--- a/frame_data_test.go
+++ b/frame_data_test.go
@@ -10,17 +10,23 @@ import (
 )
 
 type mockedFrameDataFrame struct {
-	h          int
-	imageBytes []byte
-	pf         PixelFormat
-	planes_    []frameDataPlane
-	w          int
+	copiedPlanes []frameDataPlane
+	h            int
+	onBytes      func(align int) ([]byte, error)
+	onPlanes     func(b []byte, align int) ([]frameDataPlane, error)
+	pf           PixelFormat
+	w            int
 }
 
 var _ frameDataFramer = (*mockedFrameDataFrame)(nil)
 
 func (f *mockedFrameDataFrame) bytes(align int) ([]byte, error) {
-	return f.imageBytes, nil
+	return f.onBytes(align)
+}
+
+func (f *mockedFrameDataFrame) copyPlanes(ps []frameDataPlane) error {
+	f.copiedPlanes = ps
+	return nil
 }
 
 func (f *mockedFrameDataFrame) height() int {
@@ -31,8 +37,8 @@ func (f *mockedFrameDataFrame) pixelFormat() PixelFormat {
 	return f.pf
 }
 
-func (f *mockedFrameDataFrame) planes() ([]frameDataPlane, error) {
-	return f.planes_, nil
+func (f *mockedFrameDataFrame) planes(b []byte, align int) ([]frameDataPlane, error) {
+	return f.onPlanes(b, align)
 }
 
 func (f *mockedFrameDataFrame) width() int {
@@ -113,16 +119,16 @@ func TestFrameDataInternal(t *testing.T) {
 		}
 	}
 
-	fdf.h = 1
-	fdf.imageBytes = []byte{0, 1, 2, 3}
-	fdf.w = 2
-	b, err := fd.Bytes(0)
+	b1 := []byte{0, 1, 2, 3}
+	fdf.onBytes = func(align int) ([]byte, error) { return b1, nil }
+	b2, err := fd.Bytes(0)
 	require.NoError(t, err)
-	require.Equal(t, fdf.imageBytes, b)
+	require.Equal(t, b1, b2)
 
+	fdf.h = 1
+	fdf.w = 2
 	for _, v := range []struct {
 		e           image.Image
-		err         bool
 		i           image.Image
 		pixelFormat PixelFormat
 		planes      []frameDataPlane
@@ -326,48 +332,240 @@ func TestFrameDataInternal(t *testing.T) {
 		},
 	} {
 		fdf.pf = v.pixelFormat
-		fdf.planes_ = v.planes
-		err = fd.ToImage(v.i)
-		if v.err {
-			require.Error(t, err)
-		} else {
-			require.Equal(t, v.e, v.i)
-		}
+		fdf.onPlanes = func(b []byte, align int) ([]frameDataPlane, error) { return v.planes, nil }
+		require.NoError(t, fd.ToImage(v.i))
+		require.Equal(t, v.e, v.i)
+	}
+
+	b1 = []byte{1, 2, 3, 4}
+	fdf.onPlanes = func(b []byte, align int) ([]frameDataPlane, error) {
+		return []frameDataPlane{
+			{
+				bytes:    b1[:2],
+				linesize: 1,
+			},
+			{
+				bytes:    b1[2:],
+				linesize: 2,
+			},
+		}, nil
+	}
+	require.NoError(t, fd.SetBytes(b1, 0))
+	require.Equal(t, []frameDataPlane{
+		{bytes: b1[:2], linesize: 1},
+		{bytes: b1[2:], linesize: 2},
+	}, fdf.copiedPlanes)
+
+	for _, v := range []struct {
+		expectedCopiedPlanes []frameDataPlane
+		i                    image.Image
+	}{
+		{
+			expectedCopiedPlanes: []frameDataPlane{{bytes: []byte{0, 1, 2, 3}, linesize: 1}},
+			i: &image.Alpha{
+				Pix:    []byte{0, 1, 2, 3},
+				Stride: 1,
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{{bytes: []byte{0, 1, 2, 3}, linesize: 1}},
+			i: &image.Alpha16{
+				Pix:    []byte{0, 1, 2, 3},
+				Stride: 1,
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{{bytes: []byte{0, 1, 2, 3}, linesize: 1}},
+			i: &image.CMYK{
+				Pix:    []byte{0, 1, 2, 3},
+				Stride: 1,
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{{bytes: []byte{0, 1, 2, 3}, linesize: 1}},
+			i: &image.Gray{
+				Pix:    []byte{0, 1, 2, 3},
+				Stride: 1,
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{{bytes: []byte{0, 1, 2, 3}, linesize: 1}},
+			i: &image.Gray16{
+				Pix:    []byte{0, 1, 2, 3},
+				Stride: 1,
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{{bytes: []byte{0, 1, 2, 3}, linesize: 1}},
+			i: &image.NRGBA{
+				Pix:    []byte{0, 1, 2, 3},
+				Stride: 1,
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{{bytes: []byte{0, 1, 2, 3}, linesize: 1}},
+			i: &image.NRGBA64{
+				Pix:    []byte{0, 1, 2, 3},
+				Stride: 1,
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{
+				{bytes: []byte{0, 1}, linesize: 1},
+				{bytes: []byte{2, 3}, linesize: 2},
+				{bytes: []byte{4, 5}, linesize: 2},
+				{bytes: []byte{6, 7}, linesize: 4},
+			},
+			i: &image.NYCbCrA{
+				A:       []byte{6, 7},
+				AStride: 4,
+				YCbCr: image.YCbCr{
+					Y:       []byte{0, 1},
+					Cb:      []byte{2, 3},
+					Cr:      []byte{4, 5},
+					YStride: 1,
+					CStride: 2,
+				},
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{{bytes: []byte{0, 1, 2, 3}, linesize: 1}},
+			i: &image.RGBA{
+				Pix:    []byte{0, 1, 2, 3},
+				Stride: 1,
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{{bytes: []byte{0, 1, 2, 3}, linesize: 1}},
+			i: &image.RGBA64{
+				Pix:    []byte{0, 1, 2, 3},
+				Stride: 1,
+			},
+		},
+		{
+			expectedCopiedPlanes: []frameDataPlane{
+				{bytes: []byte{0, 1}, linesize: 1},
+				{bytes: []byte{2, 3}, linesize: 2},
+				{bytes: []byte{4, 5}, linesize: 2},
+			},
+			i: &image.YCbCr{
+				Y:       []byte{0, 1},
+				Cb:      []byte{2, 3},
+				Cr:      []byte{4, 5},
+				YStride: 1,
+				CStride: 2,
+			},
+		},
+	} {
+		require.NoError(t, fd.FromImage(v.i))
+		require.Equal(t, v.expectedCopiedPlanes, fdf.copiedPlanes)
 	}
 }
 
 func TestFrameData(t *testing.T) {
 	for _, v := range []struct {
 		ext  string
+		ifmt *InputFormat
+		md   MediaType
 		name string
 	}{
+		{
+			ext:  "pcm",
+			ifmt: FindInputFormat("s16le"),
+			md:   MediaTypeAudio,
+			name: "audio-s16le",
+		},
 		{
 			ext:  "png",
+			md:   MediaTypeVideo,
 			name: "image-rgba",
 		},
 		{
 			ext:  "h264",
+			md:   MediaTypeVideo,
 			name: "video-yuv420p",
 		},
 	} {
-		f, err := globalHelper.inputLastFrame(v.name+"."+v.ext, MediaTypeVideo)
+		f1, err := globalHelper.inputLastFrame(v.name+"."+v.ext, v.md, v.ifmt)
 		require.NoError(t, err)
-		fd := f.Data()
+		fd1 := f1.Data()
 
-		b1, err := fd.Bytes(1)
+		b1, err := fd1.Bytes(1)
 		require.NoError(t, err)
 		b2 := []byte(fmt.Sprintf("%+v", b1))
 		b3, err := os.ReadFile("testdata/" + v.name + "-bytes")
 		require.NoError(t, err)
-		require.Equal(t, b2, b3)
+		require.Equal(t, b3, b2)
 
-		i1, err := fd.GuessImageFormat()
-		require.NoError(t, err)
-		require.NoError(t, fd.ToImage(i1))
-		b4 := []byte(fmt.Sprintf("%+v", i1))
-		b5, err := os.ReadFile("testdata/" + v.name + "-struct")
+		var i1 image.Image
+		switch v.md {
+		case MediaTypeVideo:
+			i1, err = fd1.GuessImageFormat()
+			require.NoError(t, err)
+			require.NoError(t, fd1.ToImage(i1))
+			b4 := []byte(fmt.Sprintf("%+v", i1))
+			b5, err := os.ReadFile("testdata/" + v.name + "-struct")
+			require.NoError(t, err)
+			require.Equal(t, b5, b4)
+		}
+
+		f2 := AllocFrame()
+		defer f2.Free()
+		fd2 := f2.Data()
+
+		align := 0
+		switch v.md {
+		case MediaTypeAudio:
+			f2.SetChannelLayout(f1.ChannelLayout())
+			f2.SetNbSamples(f1.NbSamples())
+			f2.SetSampleFormat(f1.SampleFormat())
+			f2.SetSampleRate(f1.SampleRate())
+			require.NoError(t, f2.AllocBuffer(align))
+			require.NoError(t, f2.AllocSamples(align))
+		case MediaTypeVideo:
+			align = 1
+			f2.SetHeight(f1.Height())
+			f2.SetPixelFormat(f1.PixelFormat())
+			f2.SetWidth(f1.Width())
+			require.NoError(t, f2.AllocBuffer(align))
+			require.NoError(t, f2.AllocImage(align))
+		}
+
+		switch v.md {
+		case MediaTypeVideo:
+			require.NoError(t, fd2.FromImage(i1))
+			b6, err := fd2.Bytes(align)
+			require.NoError(t, err)
+			b7 := []byte(fmt.Sprintf("%+v", b6))
+			require.Equal(t, b3, b7)
+		}
+
+		switch v.md {
+		case MediaTypeAudio:
+			require.NoError(t, f2.SamplesFillSilence())
+		case MediaTypeVideo:
+			require.NoError(t, f2.ImageFillBlack())
+		}
+		require.NoError(t, fd2.SetBytes(b1, align))
+		b1[0] -= 1
+		b8, err := fd2.Bytes(align)
 		require.NoError(t, err)
-		require.Equal(t, b4, b5)
+		b9 := []byte(fmt.Sprintf("%+v", b8))
+		require.Equal(t, b3, b9)
 
+		f3 := AllocFrame()
+		defer f3.Free()
+		require.NoError(t, f3.Ref(f2))
+		switch v.md {
+		case MediaTypeVideo:
+			require.Error(t, fd2.FromImage(i1))
+		}
+		require.Error(t, fd2.SetBytes(b1, align))
+		f2.MakeWritable()
+		switch v.md {
+		case MediaTypeVideo:
+			require.NoError(t, fd2.FromImage(i1))
+		}
+		require.NoError(t, fd2.SetBytes(b1, align))
 	}
 }
diff --git a/frame_test.go b/frame_test.go
index 8a942b9..e375098 100644
--- a/frame_test.go
+++ b/frame_test.go
@@ -9,7 +9,7 @@ import (
 )
 
 func TestFrame(t *testing.T) {
-	f1, err := globalHelper.inputLastFrame("video.mp4", MediaTypeVideo)
+	f1, err := globalHelper.inputLastFrame("video.mp4", MediaTypeVideo, nil)
 	require.NoError(t, err)
 	// Should be "{384, 192, 192, 0, 0, 0, 0, 0}" but for some reason it"s "{320, 160, 160, 0, 0, 0, 0, 0}"
 	// on darwin when testing using github
@@ -75,10 +75,18 @@ func TestFrame(t *testing.T) {
 	f4.SetChannelLayout(ChannelLayoutStereo)
 	f4.SetSampleFormat(SampleFormatS16)
 	f4.SetSampleRate(48000)
-	err = f4.AllocBuffer(0)
+	align := 0
+	require.NoError(t, f4.AllocBuffer(align))
+	require.NoError(t, f4.AllocSamples(align))
+	require.NoError(t, f4.SamplesFillSilence())
+	n, err := f4.SamplesBufferSize(align)
 	require.NoError(t, err)
-	err = f4.AllocSamples(0)
+	require.Equal(t, 3840, n)
+	b := make([]byte, n)
+	n, err = f4.SamplesCopyToBuffer(b, align)
 	require.NoError(t, err)
+	require.Equal(t, 3840, n)
+	require.Equal(t, []byte{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 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 	f5 := AllocFrame()
 	require.NotNil(t, f5)
@@ -103,16 +111,22 @@ func TestFrame(t *testing.T) {
 	f6.SetHeight(2)
 	f6.SetPixelFormat(PixelFormatYuv420P)
 	f6.SetWidth(4)
-	const align = 1
+	align = 1
 	require.NoError(t, f6.AllocBuffer(align))
 	require.NoError(t, f6.AllocImage(align))
 	require.NoError(t, f6.ImageFillBlack())
-	n, err := f6.ImageBufferSize(align)
+	n, err = f6.ImageBufferSize(align)
 	require.NoError(t, err)
 	require.Equal(t, 12, n)
-	b := make([]byte, n)
+	b = make([]byte, n)
 	n, err = f6.ImageCopyToBuffer(b, align)
 	require.NoError(t, err)
 	require.Equal(t, 12, n)
 	require.Equal(t, []byte{0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x80, 0x80, 0x80, 0x80}, b)
+
+	require.True(t, f6.IsWritable())
+	require.NoError(t, f5.Ref(f6))
+	require.False(t, f6.IsWritable())
+	require.NoError(t, f6.MakeWritable())
+	require.True(t, f6.IsWritable())
 }
diff --git a/io_context.go b/io_context.go
index b1b26b3..1156b19 100644
--- a/io_context.go
+++ b/io_context.go
@@ -6,6 +6,7 @@ import "C"
 import (
 	"errors"
 	"fmt"
+	"io"
 	"sync"
 	"unsafe"
 )
@@ -121,15 +122,23 @@ func (ic *IOContext) Class() *Class {
 }
 
 func (ic *IOContext) Close() error {
-	classers.del(ic)
 	if ic.c != nil {
-		return newError(C.avio_closep(&ic.c))
+		// Make sure to clone the classer before freeing the object since
+		// the C free method may reset the pointer
+		c := newClonedClasser(ic)
+		if err := newError(C.avio_closep(&ic.c)); err != nil {
+			return err
+		}
+		// Make sure to remove from classers after freeing the object since
+		// the C free method may use methods needing the classer
+		if c != nil {
+			classers.del(c)
+		}
 	}
 	return nil
 }
 
 func (ic *IOContext) Free() {
-	classers.del(ic)
 	if ic.c != nil {
 		if ic.c.buffer != nil {
 			C.av_freep(unsafe.Pointer(&ic.c.buffer))
@@ -138,7 +147,15 @@ func (ic *IOContext) Free() {
 			C.free(ic.handlerID)
 			ic.handlerID = nil
 		}
+		// Make sure to clone the classer before freeing the object since
+		// the C free method may reset the pointer
+		c := newClonedClasser(ic)
 		C.avio_context_free(&ic.c)
+		// Make sure to remove from classers after freeing the object since
+		// the C free method may use methods needing the classer
+		if c != nil {
+			classers.del(c)
+		}
 	}
 	return
 }
@@ -241,6 +258,8 @@ func goAstiavIOContextReadFunc(opaque unsafe.Pointer, buf *C.uint8_t, bufSize C.
 		var e Error
 		if errors.As(err, &e) {
 			return C.int(e)
+		} else if errors.Is(err, io.EOF) {
+			return C.AVERROR_EOF
 		}
 		return C.AVERROR_UNKNOWN
 	}
diff --git a/io_context_test.go b/io_context_test.go
index 0f82882..09d4576 100644
--- a/io_context_test.go
+++ b/io_context_test.go
@@ -1,6 +1,7 @@
 package astiav
 
 import (
+	"io"
 	"os"
 	"path/filepath"
 	"testing"
@@ -9,34 +10,48 @@ import (
 )
 
 func TestIOContext(t *testing.T) {
-	var seeked bool
-	rb := []byte("read")
-	wb := []byte("write")
-	var written []byte
-	c, err := AllocIOContext(8, true, func(b []byte) (int, error) {
-		copy(b, rb)
-		return len(rb), nil
-	}, func(offset int64, whence int) (n int64, err error) {
-		seeked = true
-		return offset, nil
-	}, func(b []byte) (int, error) {
-		written = make([]byte, len(b))
-		copy(written, b)
-		return len(b), nil
+	t.Run("read write seek", func(t *testing.T) {
+		var seeked bool
+		rb := []byte("read")
+		wb := []byte("write")
+		var written []byte
+		c, err := AllocIOContext(8, true, func(b []byte) (int, error) {
+			copy(b, rb)
+			return len(rb), nil
+		}, func(offset int64, whence int) (n int64, err error) {
+			seeked = true
+			return offset, nil
+		}, func(b []byte) (int, error) {
+			written = make([]byte, len(b))
+			copy(written, b)
+			return len(b), nil
+		})
+		require.NoError(t, err)
+		defer c.Free()
+		b := make([]byte, 6)
+		n, err := c.Read(b)
+		require.NoError(t, err)
+		require.Equal(t, 4, n)
+		require.Equal(t, rb, b[:n])
+		_, err = c.Seek(2, 0)
+		require.NoError(t, err)
+		require.True(t, seeked)
+		c.Write(wb)
+		c.Flush()
+		require.Equal(t, wb, written)
+	})
+
+	t.Run("io.EOF is mapped to AVERROR_EOF when reading", func(t *testing.T) {
+		c, err := AllocIOContext(8, false, func(b []byte) (int, error) {
+			return 0, io.EOF
+		}, nil, nil)
+		require.NoError(t, err)
+		defer c.Free()
+		b := make([]byte, 100)
+		n, err := c.Read(b)
+		require.ErrorIs(t, err, ErrEof)
+		require.Equal(t, 0, n)
 	})
-	require.NoError(t, err)
-	defer c.Free()
-	b := make([]byte, 6)
-	n, err := c.Read(b)
-	require.NoError(t, err)
-	require.Equal(t, 4, n)
-	require.Equal(t, rb, b[:n])
-	_, err = c.Seek(2, 0)
-	require.NoError(t, err)
-	require.True(t, seeked)
-	c.Write(wb)
-	c.Flush()
-	require.Equal(t, wb, written)
 }
 
 func TestOpenIOContext(t *testing.T) {
diff --git a/software_scale_context.go b/software_scale_context.go
index 9f4f178..d225202 100644
--- a/software_scale_context.go
+++ b/software_scale_context.go
@@ -60,8 +60,15 @@ func CreateSoftwareScaleContext(srcW, srcH int, srcFormat PixelFormat, dstW, dst
 }
 
 func (ssc *SoftwareScaleContext) Free() {
-	classers.del(ssc)
+	// Make sure to clone the classer before freeing the object since
+	// the C free method may reset the pointer
+	c := newClonedClasser(ssc)
 	C.sws_freeContext(ssc.c)
+	// Make sure to remove from classers after freeing the object since
+	// the C free method may use methods needing the classer
+	if c != nil {
+		classers.del(c)
+	}
 }
 
 var _ Classer = (*SoftwareScaleContext)(nil)
diff --git a/software_scale_context_test.go b/software_scale_context_test.go
index 99b524e..88681ec 100644
--- a/software_scale_context_test.go
+++ b/software_scale_context_test.go
@@ -93,7 +93,7 @@ func TestSoftwareScaleContext(t *testing.T) {
 	require.Equal(t, w, srcW)
 	require.Equal(t, h, srcH)
 
-	f4, err := globalHelper.inputLastFrame("image-rgba.png", MediaTypeVideo)
+	f4, err := globalHelper.inputLastFrame("image-rgba.png", MediaTypeVideo, nil)
 	require.NoError(t, err)
 
 	f5 := AllocFrame()
diff --git a/stream_test.go b/stream_test.go
index e374b8f..0703496 100644
--- a/stream_test.go
+++ b/stream_test.go
@@ -7,7 +7,7 @@ import (
 )
 
 func TestStream(t *testing.T) {
-	fc, err := globalHelper.inputFormatContext("video.mp4")
+	fc, err := globalHelper.inputFormatContext("video.mp4", nil)
 	require.NoError(t, err)
 	ss := fc.Streams()
 	require.Len(t, ss, 2)
diff --git a/testdata/audio-s16le-bytes b/testdata/audio-s16le-bytes
new file mode 100755
index 0000000..7d4c4bd
--- /dev/null
+++ b/testdata/audio-s16le-bytes
@@ -0,0 +1 @@
+[61 254 101 0 68 254 135 255 100 254 242 254 174 254 186 254 45 255 168 254 215 255 143 254 154 0 148 254 79 1 199 254 201 1 255 254 242 1 58 255 199 1 130 255 104 1 192 255 8 1 7 0 184 0 101 0 113 0 181 0 60 0 240 0 32 0 44 1 22 0 51 1 13 0 218 0 235 255 63 0 159 255 119 255 96 255 174 254 111 255 54 254 199 255 19 254 63 0 8 254 187 0 13 254 35 1 52 254 92 1 123 254 90 1 225 254 21 1 72 255 145 0 133 255 237 255 165 255 99 255 208 255 27 255 11 0 255 254 75 0 220 254 132 0 174 254 145 0 154 254 96 0 180 254 1 0 248 254 137 255 94 255 22 255 227 255 219 254 125 0 221 254 19 1 244 254 147 1 27 255 249 1 111 255 55 2 237 255 50 2 104 0 217 1 197 0 61 1 15 1 140 0 95 1 238 255 188 1 124 255 14 2 74 255 62 2 94 255 78 2 138 255 55 2 154 255 216 1 143 255 42 1 130 255 85 0 138 255 149 255 178 255 25 255 242 255 222 254 66 0 209 254 170 0 244 254 16 1 59 255 68 1 130 255 79 1 212 255 72 1 67 0 18 1 163 0 166 0 220 0 67 0 26 1 12 0 110 1 239 255 182 1 210 255 226 1 154 255 228 1 64 255 160 1 244 254 6 1 232 254 42 0 14 255 84 255 69 255 214 254 127 255 165 254 202 255 133 254 56 0 120 254 169 0 154 254 226 0 226 254 204 0 64 255 120 0 159 255 232 255 216 255 31 255 240 255 78 254 32 0 187 253 125 0 133 253 232 0 154 253 60 1 211 253 84 1 12 254 24 1 60 254 139 0 99 254 189 255 144 254 218 254 228 254 52 254 111 255 250 253 19 0 7 254 183 0 48 254 85 1 119 254 213 1 217 254 26 2 79 255 26 2 214 255 192 1 83 0 11 1 163 0 82 0 217 0 237 255 16 1 207 255 68 1 195 255 127 1 187 255 175 1 183 255 142 1 173 255 254 0 165 255 42 0 175 255 68 255 223 255 145 254 64 0 67 254 189 0 39 254 45 1 8 254 122 1 19 254 169 1 103 254 198 1 218 254 207 1 84 255 186 1 204 255 126 1 46 0 38 1 132 0 197 0 221 0 107 0 46 1 25 0 121 1 208 255 173 1 150 255 150 1 110 255 49 1 68 255 156 0 14 255 218 255 243 254 9 255 39 255 134 254 152 255 107 254 9 0 121 254 121 0 148 254 4 1 222 254 122 1 98 255 145 1 240 255 80 1 88 0 214 0 164 0 40 0 247 0 114 255 77 1 245 254 135 1 182 254 166 1 136 254 178 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254 149 254 90 255 157 255 220 255 195 0 104 0 218 1 200 0 181 2 211 0 41 3 157 0 30 3 61 0 169 2 199 255 244 1 109 255 51 1 88 255 147 0 119 255 17 0 162 255 153 255 214 255 52 255 21 0 223 254 81 0 149 254 122 0 119 254 147 0 170 254 164 0 20 255 176 0 142 255 196 0 18 0 215 0 177 0 213 0 111 1 199 0 23 2 206 0 95 2 215 0 48 2 182 0 149 1 100 0 175 0 0 0 187 255 178 255 235 254 152 255 65 254 172 255 189 253 219 255 105 253 40 0 61 253 142 0 65 253 228 0 134 253 2 1 252 253 223 0 134 254 152 0 38 255 106 0 226 255 118 0 189 0 179 0 184 1 3 1 178 2 63 1 85 3 65 1 108 3 10 1 23 3 173 0 120 2 40 0 146 1 125 255 138 0 197 254 156 255 46 254 206 254 232 253 14 254 248 253 106 253 47 254 251 252 106 254 201 252 174 254 228 252 255 254 82 253 83 255 254 253 180 255 223 254 60 0 243 255 228 0 31 1 110 1 46 2 162 1 233 2 150 1 44 3 109 1 242 2 17 1 71 2 139 0 92 1 27 0 139 0 197 255 251 255 109 255 128 255 55 255 3 255 64 255 158 254 102 255 90 254 143 255 62 254 175 255 98 254 168 255 193 254 122 255 75 255 73 255 4 0 45 255 223 0 50 255 187 1 86 255 123 2 114 255 246 2 115 255 10 3 106 255 182 2 70 255 5 2 249 254 17 1 195 254 29 0 226 254 93 255 51 255 197 254 118 255 68 254 178 255 224 253 7 0 170 253 93 0 183 253 124 0 14 254 91 0 147 254 50 0 52 255 48 0 251 255 89 0 221 0 140 0 179 1 171 0 96 2 185 0 221 2 203 0 19 3 225 0 211 2 220 0 21 2 170 0 21 1 101 0 20 0 44 0 43 255 3 0 104 254 226 255 201 253 207 255 58 253 209 255 196 252 234 255 141 252 10 0 147 252 29 0 197 252 24 0 45 253 247 255 205 253 195 255 154 254 173 255 135 255 234 255 110 0 91 0 42 1 179 0 180 1 211 0 239 1 209 0 176 1 195 0 27 1 172 0 121 0 121 0 233 255 41 0 116 255 240 255 21 255 3 0 184 254 78 0 119 254 148 0 113 254 168 0 150 254 125 0 225 254 40 0 106 255 197 255 25 0 109 255 209 0 66 255 163 1 73 255 134 2 91 255 57 3 105 255 143 3 128 255 133 3 138 255 39 3 121 255 132 2 110 255 174 1 138 255 220 0 205 255 73 0 44 0 221 255 134 0 101 255 214 0 246 254 45 1 182 254 109 1 163 254 97 1 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