diff --git a/conn/conn.go b/conn/conn.go
index 64ce618..cab6fa2 100644
--- a/conn/conn.go
+++ b/conn/conn.go
@@ -4,7 +4,6 @@ package conn
 import (
 	"errors"
 
-	"github.com/pion/rtp"
 	"github.com/pion/webrtc/v3"
 )
 
@@ -38,7 +37,7 @@ type Down interface {
 
 // Type DownTrack represents a track in the server to client direction.
 type DownTrack interface {
-	WriteRTP(packat *rtp.Packet) error
+	Write(buf []byte) (int, error)
 	SetTimeOffset(ntp uint64, rtp uint32)
 	SetCname(string)
 	GetMaxBitrate() uint64
diff --git a/diskwriter/diskwriter.go b/diskwriter/diskwriter.go
index db8bd2b..2296c2b 100644
--- a/diskwriter/diskwriter.go
+++ b/diskwriter/diskwriter.go
@@ -338,19 +338,6 @@ func (t *diskTrack) SetTimeOffset(ntp uint64, rtp uint32) {
 func (t *diskTrack) SetCname(string) {
 }
 
-func clonePacket(packet *rtp.Packet) *rtp.Packet {
-	buf, err := packet.Marshal()
-	if err != nil {
-		return nil
-	}
-	var p rtp.Packet
-	err = p.Unmarshal(buf)
-	if err != nil {
-		return nil
-	}
-	return &p
-}
-
 func isKeyframe(codec string, data []byte) bool {
 	switch strings.ToLower(codec) {
 	case "video/vp8":
@@ -417,20 +404,24 @@ func keyframeDimensions(codec string, data []byte, packet *rtp.Packet) (uint32,
 	}
 }
 
-func (t *diskTrack) WriteRTP(packet *rtp.Packet) error {
+func (t *diskTrack) Write(buf []byte) (int, error) {
 	// since we call initWriter, we take the connection lock for simplicity.
 	t.conn.mu.Lock()
 	defer t.conn.mu.Unlock()
 
 	if t.builder == nil {
-		return nil
+		return 0, nil
 	}
 
 	codec := t.remote.Codec()
 
-	p := clonePacket(packet)
-	if p == nil {
-		return nil
+	data := make([]byte, len(buf))
+	copy(data, buf)
+	p := new(rtp.Packet)
+	err := p.Unmarshal(data)
+	if err != nil {
+		log.Printf("Diskwriter: %v", err)
+		return 0, nil
 	}
 
 	if strings.ToLower(codec.MimeType) == "video/vp9" {
@@ -459,8 +450,9 @@ func (t *diskTrack) WriteRTP(packet *rtp.Packet) error {
 		if sample == nil {
 			if kfNeeded {
 				t.remote.RequestKeyframe()
+				return 0, nil
 			}
-			return nil
+			return len(buf), nil
 		}
 
 		keyframe := true
@@ -479,7 +471,7 @@ func (t *diskTrack) WriteRTP(packet *rtp.Packet) error {
 					t.conn.warn(
 						"Write to disk " + err.Error(),
 					)
-					return err
+					return 0, err
 				}
 				t.lastKf = ts
 			} else if t.writer != nil {
@@ -498,7 +490,7 @@ func (t *diskTrack) WriteRTP(packet *rtp.Packet) error {
 							"Write to disk " +
 								err.Error(),
 						)
-						return err
+						return 0, err
 					}
 				}
 			}
@@ -508,7 +500,7 @@ func (t *diskTrack) WriteRTP(packet *rtp.Packet) error {
 			if !keyframe {
 				t.remote.RequestKeyframe()
 			}
-			return nil
+			return 0, nil
 		}
 
 		if t.origin == 0 {
@@ -519,7 +511,7 @@ func (t *diskTrack) WriteRTP(packet *rtp.Packet) error {
 		tm := ts / (t.remote.Codec().ClockRate / 1000)
 		_, err := t.writer.Write(keyframe, int64(tm), sample.Data)
 		if err != nil {
-			return err
+			return 0, err
 		}
 	}
 }
diff --git a/rtpconn/rtpconn.go b/rtpconn/rtpconn.go
index 10c6e61..b4ca691 100644
--- a/rtpconn/rtpconn.go
+++ b/rtpconn/rtpconn.go
@@ -89,15 +89,12 @@ type rtpDownTrack struct {
 	cname          atomic.Value
 }
 
-func (down *rtpDownTrack) WriteRTP(packet *rtp.Packet) error {
-	err := down.track.WriteRTP(packet)
+func (down *rtpDownTrack) Write(buf []byte) (int, error) {
+	n, err := down.track.Write(buf)
 	if err == nil {
-		// we should account for extensions
-		down.rate.Accumulate(
-			uint32(12 + 4*len(packet.CSRC) + len(packet.Payload)),
-		)
+		down.rate.Accumulate(uint32(n))
 	}
-	return err
+	return n, err
 }
 
 func (down *rtpDownTrack) SetTimeOffset(ntp uint64, rtp uint32) {
diff --git a/rtpconn/rtpwriter.go b/rtpconn/rtpwriter.go
index bc4166d..81c47e6 100644
--- a/rtpconn/rtpwriter.go
+++ b/rtpconn/rtpwriter.go
@@ -6,8 +6,6 @@ import (
 	"sort"
 	"time"
 
-	"github.com/pion/rtp"
-
 	"github.com/jech/galene/conn"
 	"github.com/jech/galene/packetcache"
 	"github.com/jech/galene/rtptime"
@@ -211,17 +209,13 @@ func (writer *rtpWriter) add(track conn.DownTrack, add bool, max int) error {
 
 func sendKeyframe(kf []uint16, track conn.DownTrack, cache *packetcache.Cache) {
 	buf := make([]byte, packetcache.BufSize)
-	var packet rtp.Packet
 	for _, seqno := range kf {
 		bytes := cache.Get(seqno, buf)
 		if bytes == 0 {
 			return
 		}
-		err := packet.Unmarshal(buf[:bytes])
-		if err != nil {
-			return
-		}
-		err = track.WriteRTP(&packet)
+
+		_, err := track.Write(buf[:bytes])
 		if err != nil {
 			return
 		}
@@ -233,8 +227,6 @@ func rtpWriterLoop(writer *rtpWriter, up *rtpUpConnection, track *rtpUpTrack) {
 	defer close(writer.done)
 
 	buf := make([]byte, packetcache.BufSize)
-	var packet rtp.Packet
-
 	local := make([]conn.DownTrack, 0)
 
 	for {
@@ -310,13 +302,8 @@ func rtpWriterLoop(writer *rtpWriter, up *rtpUpConnection, track *rtpUpTrack) {
 				continue
 			}
 
-			err := packet.Unmarshal(buf[:bytes])
-			if err != nil {
-				continue
-			}
-
 			for _, l := range local {
-				err := l.WriteRTP(&packet)
+				_, err := l.Write(buf[:bytes])
 				if err != nil {
 					continue
 				}