diff --git a/metadata/media_format.go b/metadata/media_format.go
index 907c645..74c7b40 100644
--- a/metadata/media_format.go
+++ b/metadata/media_format.go
@@ -1,6 +1,15 @@
 package metadata
 
-import "git.lumeweb.com/LumeWeb/libs5-go/encoding"
+import (
+	"errors"
+	"git.lumeweb.com/LumeWeb/libs5-go/encoding"
+	"github.com/vmihailenco/msgpack/v5"
+)
+
+var (
+	_ msgpack.CustomDecoder = (*MediaFormat)(nil)
+	_ msgpack.CustomEncoder = (*MediaFormat)(nil)
+)
 
 type MediaFormat struct {
 	Subtype       string
@@ -29,6 +38,10 @@ type MediaFormat struct {
 	Caption       string
 }
 
+func (mmd *MediaFormat) EncodeMsgpack(encoder *msgpack.Encoder) error {
+	return errors.New("Not implemented")
+}
+
 func NewMediaFormat(subtype string, role, ext, vcodec, acodec, container, dynamicRange, charset, initRange, indexRange, caption string, cid *encoding.CID, height, width, asr, fps, bitrate, audioChannels, duration, rows, columns, index int, languages []string, value []byte) *MediaFormat {
 	return &MediaFormat{
 		Subtype:       subtype,
@@ -57,3 +70,68 @@ func NewMediaFormat(subtype string, role, ext, vcodec, acodec, container, dynami
 		Caption:       caption,
 	}
 }
+func (mmd *MediaFormat) DecodeMsgpack(dec *msgpack.Decoder) error {
+	intMap, err := decodeIntMap(dec)
+	if err != nil {
+		return err
+	}
+
+	for key, value := range intMap {
+		switch key {
+		case 1:
+			mmd.Cid, err = encoding.CIDFromBytes(value.([]byte))
+			if err != nil {
+				return err
+			}
+
+		case 2:
+			mmd.Subtype = value.(string)
+		case 3:
+			mmd.Role = value.(string)
+		case 4:
+			mmd.Ext = value.(string)
+		case 10:
+			mmd.Height = value.(int)
+		case 11:
+			mmd.Width = value.(int)
+		case 12:
+			mmd.Languages = value.([]string)
+		case 13:
+			mmd.Asr = value.(int)
+		case 14:
+			mmd.Fps = value.(int)
+		case 15:
+			mmd.Bitrate = value.(int)
+		case 18:
+			mmd.AudioChannels = value.(int)
+		case 19:
+			mmd.Vcodec = value.(string)
+		case 20:
+			mmd.Acodec = value.(string)
+		case 21:
+			mmd.Container = value.(string)
+		case 22:
+			mmd.DynamicRange = value.(string)
+		case 23:
+			mmd.Charset = value.(string)
+		case 24:
+			mmd.Value = value.([]byte)
+		case 25:
+			mmd.Duration = value.(int)
+		case 26:
+			mmd.Rows = value.(int)
+		case 27:
+			mmd.Columns = value.(int)
+		case 28:
+			mmd.Index = value.(int)
+		case 29:
+			mmd.InitRange = value.(string)
+		case 30:
+			mmd.IndexRange = value.(string)
+		case 31:
+			mmd.Caption = value.(string)
+		}
+	}
+
+	return nil
+}