diff --git a/examples/rtp/main.go b/examples/rtp/main.go
index 22f1906..1295132 100644
--- a/examples/rtp/main.go
+++ b/examples/rtp/main.go
@@ -47,7 +47,7 @@ func main() {
 	})
 	must(err)
 
-	videoTrack := mediaStream.GetVideoTracks()[0].(*mediadevices.VideoTrack)
+	videoTrack := mediaStream.GetVideoTracks()[0]
 	defer videoTrack.Close()
 
 	rtpReader, err := videoTrack.NewRTPReader(vp8Params.RTPCodec().Name, mtu)
diff --git a/track.go b/track.go
index df05618..273df5e 100644
--- a/track.go
+++ b/track.go
@@ -54,6 +54,9 @@ type Track interface {
 	// Unbind is the clean up operation that should be called after Bind. Similar to Bind, unbind will
 	// be called automatically in the future.
 	Unbind(*webrtc.PeerConnection) error
+	// NewRTPReader creates a new reader from the source. The reader will encode the source, and packetize
+	// the encoded data in RTP format with given mtu size.
+	NewRTPReader(codecName string, mtu int) (RTPReadCloser, error)
 }
 
 type baseTrack struct {