diff --git a/frame.go b/frame.go
index 8260345..2081ded 100644
--- a/frame.go
+++ b/frame.go
@@ -140,6 +140,14 @@ func (f *Frame) SetSampleRate(r int) {
 	f.c.sample_rate = C.int(r)
 }
 
+func (f *Frame) NewSideData(t FrameSideDataType, size int) *FrameSideData {
+	return newFrameSideDataFromC(C.av_frame_new_side_data(f.c, (C.enum_AVFrameSideDataType)(t), C.int(size)))
+}
+
+func (f *Frame) SideData(t FrameSideDataType) *FrameSideData {
+	return newFrameSideDataFromC(C.av_frame_get_side_data(f.c, (C.enum_AVFrameSideDataType)(t)))
+}
+
 func (f *Frame) Width() int {
 	return int(f.c.width)
 }
diff --git a/frame_side_data.go b/frame_side_data.go
new file mode 100644
index 0000000..f45d278
--- /dev/null
+++ b/frame_side_data.go
@@ -0,0 +1,36 @@
+package astiav
+
+//#cgo pkg-config: libavutil
+//#include <libavutil/frame.h>
+import "C"
+import (
+	"math"
+	"unsafe"
+)
+
+// https://github.com/FFmpeg/FFmpeg/blob/n5.0/libavutil/frame.h#L223
+type FrameSideData struct {
+	c *C.struct_AVFrameSideData
+}
+
+func newFrameSideDataFromC(c *C.struct_AVFrameSideData) *FrameSideData {
+	if c == nil {
+		return nil
+	}
+	return &FrameSideData{c: c}
+}
+
+func (d *FrameSideData) Data() []byte {
+	return bytesFromC(func(size *C.int) *C.uint8_t {
+		*size = d.c.size
+		return d.c.data
+	})
+}
+
+func (d *FrameSideData) SetData(b []byte) {
+	C.memcpy(unsafe.Pointer(d.c.data), unsafe.Pointer(&b[0]), C.size_t(math.Min(float64(len(b)), float64(d.c.size))))
+}
+
+func (d *FrameSideData) Type() FrameSideDataType {
+	return FrameSideDataType(d.c._type)
+}
diff --git a/frame_side_data_type.go b/frame_side_data_type.go
new file mode 100644
index 0000000..fa18995
--- /dev/null
+++ b/frame_side_data_type.go
@@ -0,0 +1,33 @@
+package astiav
+
+//#cgo pkg-config: libavutil
+//#include <libavutil/frame.h>
+import "C"
+
+// https://github.com/FFmpeg/FFmpeg/blob/n5.0/libavutil/frame.h#L48
+type FrameSideDataType C.enum_AVFrameSideDataType
+
+const (
+	FrameSideDataTypePanscan                  = FrameSideDataType(C.AV_FRAME_DATA_PANSCAN)
+	FrameSideDataTypeA53Cc                    = FrameSideDataType(C.AV_FRAME_DATA_A53_CC)
+	FrameSideDataTypeStereo3D                 = FrameSideDataType(C.AV_FRAME_DATA_STEREO3D)
+	FrameSideDataTypeMatrixencoding           = FrameSideDataType(C.AV_FRAME_DATA_MATRIXENCODING)
+	FrameSideDataTypeDownmixInfo              = FrameSideDataType(C.AV_FRAME_DATA_DOWNMIX_INFO)
+	FrameSideDataTypeReplaygain               = FrameSideDataType(C.AV_FRAME_DATA_REPLAYGAIN)
+	FrameSideDataTypeDisplaymatrix            = FrameSideDataType(C.AV_FRAME_DATA_DISPLAYMATRIX)
+	FrameSideDataTypeAfd                      = FrameSideDataType(C.AV_FRAME_DATA_AFD)
+	FrameSideDataTypeMotionVectors            = FrameSideDataType(C.AV_FRAME_DATA_MOTION_VECTORS)
+	FrameSideDataTypeSkipSamples              = FrameSideDataType(C.AV_FRAME_DATA_SKIP_SAMPLES)
+	FrameSideDataTypeAudioServiceType         = FrameSideDataType(C.AV_FRAME_DATA_AUDIO_SERVICE_TYPE)
+	FrameSideDataTypeMasteringDisplayMetadata = FrameSideDataType(C.AV_FRAME_DATA_MASTERING_DISPLAY_METADATA)
+	FrameSideDataTypeGopTimecode              = FrameSideDataType(C.AV_FRAME_DATA_GOP_TIMECODE)
+	FrameSideDataTypeSpherical                = FrameSideDataType(C.AV_FRAME_DATA_SPHERICAL)
+	FrameSideDataTypeContentLightLevel        = FrameSideDataType(C.AV_FRAME_DATA_CONTENT_LIGHT_LEVEL)
+	FrameSideDataTypeIccProfile               = FrameSideDataType(C.AV_FRAME_DATA_ICC_PROFILE)
+	FrameSideDataTypeS12MTimecode             = FrameSideDataType(C.AV_FRAME_DATA_S12M_TIMECODE)
+	FrameSideDataTypeDynamicHdrPlus           = FrameSideDataType(C.AV_FRAME_DATA_DYNAMIC_HDR_PLUS)
+	FrameSideDataTypeRegionsOfInterest        = FrameSideDataType(C.AV_FRAME_DATA_REGIONS_OF_INTEREST)
+	FrameSideDataTypeVideoEncParams           = FrameSideDataType(C.AV_FRAME_DATA_VIDEO_ENC_PARAMS)
+	FrameSideDataTypeSeiUnregistered          = FrameSideDataType(C.AV_FRAME_DATA_SEI_UNREGISTERED)
+	FrameSideDataTypeFilmGrainParams          = FrameSideDataType(C.AV_FRAME_DATA_FILM_GRAIN_PARAMS)
+)
diff --git a/frame_test.go b/frame_test.go
index 067635e..61e72a4 100644
--- a/frame_test.go
+++ b/frame_test.go
@@ -187,4 +187,19 @@ func TestFrame(t *testing.T) {
 	require.NoError(t, err)
 	err = f4.AllocSamples(0)
 	require.NoError(t, err)
+
+	f5 := astiav.AllocFrame()
+	require.NotNil(t, f5)
+	defer f5.Free()
+	sd := f5.NewSideData(astiav.FrameSideDataTypeAudioServiceType, 4)
+	require.NotNil(t, sd)
+	sd.SetData([]byte{1, 2, 3})
+	sd = f5.SideData(astiav.FrameSideDataTypeAudioServiceType)
+	require.NotNil(t, sd)
+	require.Equal(t, astiav.FrameSideDataTypeAudioServiceType, sd.Type())
+	require.Equal(t, []byte{1, 2, 3, 0}, sd.Data())
+	sd.SetData([]byte{1, 2, 3, 4, 5})
+	sd = f5.SideData(astiav.FrameSideDataTypeAudioServiceType)
+	require.NotNil(t, sd)
+	require.Equal(t, []byte{1, 2, 3, 4}, sd.Data())
 }
diff --git a/packet.go b/packet.go
index 4b4c256..dc806d8 100644
--- a/packet.go
+++ b/packet.go
@@ -74,6 +74,18 @@ func (p *Packet) SetPts(v int64) {
 	p.c.pts = C.int64_t(v)
 }
 
+func (p *Packet) AddSideData(t PacketSideDataType, data []byte) error {
+	// Create buf
+	buf := (*C.uint8_t)(C.av_malloc(C.size_t(len(data))))
+	if buf == nil {
+		return errors.New("astiav: allocating buffer failed")
+	}
+	C.memcpy(unsafe.Pointer(buf), unsafe.Pointer(&data[0]), C.size_t(len(data)))
+
+	// Add
+	return newError(C.av_packet_add_side_data(p.c, (C.enum_AVPacketSideDataType)(t), buf, C.size_t(len(data))))
+}
+
 func (p *Packet) SideData(t PacketSideDataType) []byte {
 	return bytesFromC(func(size *C.int) *C.uint8_t {
 		return C.av_packet_get_side_data(p.c, (C.enum_AVPacketSideDataType)(t), size)
diff --git a/packet_test.go b/packet_test.go
index 2b96d1a..cc50220 100644
--- a/packet_test.go
+++ b/packet_test.go
@@ -101,5 +101,10 @@ func TestPacket(t *testing.T) {
 	require.NoError(t, pkt4.FromData(b))
 	require.Equal(t, b, pkt4.Data())
 
-	// TODO Test SideData
+	pkt5 := astiav.AllocPacket()
+	require.NotNil(t, pkt5)
+	defer pkt5.Free()
+	b = []byte{1, 2, 3, 4}
+	require.NoError(t, pkt5.AddSideData(astiav.PacketSideDataTypeAudioServiceType, b))
+	require.Equal(t, b, pkt5.SideData(astiav.PacketSideDataTypeAudioServiceType))
 }