diff --git a/go.mod b/go.mod
index acdcce5..f630a0a 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/Monibuca/plugin-rtmp/v3
 go 1.13
 
 require (
-	github.com/Monibuca/engine/v3 v3.0.0-alpha3
-	github.com/Monibuca/utils/v3 v3.0.0-alpha3
+	github.com/Monibuca/engine/v3 v3.0.0-alpha4
+	github.com/Monibuca/utils/v3 v3.0.0-alpha4
 	github.com/logrusorgru/aurora v2.0.3+incompatible
 )
diff --git a/go.sum b/go.sum
index 7bbe7e5..8df1fd4 100644
--- a/go.sum
+++ b/go.sum
@@ -4,8 +4,12 @@ github.com/Monibuca/engine/v3 v3.0.0-alpha2 h1:11rWc6Qnp3kuVwGh8XDXqRivUSWMyv+Au
 github.com/Monibuca/engine/v3 v3.0.0-alpha2/go.mod h1:K5FB3wk+iS/nPc+NS4XwObYQV4gtF6klEwDxaVM0BsQ=
 github.com/Monibuca/engine/v3 v3.0.0-alpha3 h1:NtFBMsu1nvEA09q64sW9xNzLdQ9RCKQXJlESM3GmGxU=
 github.com/Monibuca/engine/v3 v3.0.0-alpha3/go.mod h1:K5FB3wk+iS/nPc+NS4XwObYQV4gtF6klEwDxaVM0BsQ=
+github.com/Monibuca/engine/v3 v3.0.0-alpha4 h1:kAStDd1p9tlSQeNyAAmb7vrPL2UCz7LFTzw5LdbGxBI=
+github.com/Monibuca/engine/v3 v3.0.0-alpha4/go.mod h1:V0/kfen6K5O/RLXHPsZj4DF/LboDZ0OqfeCfn35bWMo=
 github.com/Monibuca/utils/v3 v3.0.0-alpha3 h1:n4Sq7mS1Iz8oBj2BcV4sXgKbZgix0fFLvjAfXYoiXl0=
 github.com/Monibuca/utils/v3 v3.0.0-alpha3/go.mod h1:3xYmhQbgAZBHLyIMteUCd1va+1z/xnd72B585mCaT3c=
+github.com/Monibuca/utils/v3 v3.0.0-alpha4 h1:pecYA89kWmtGOeY6R99d4T1epPJ1wc+jFrrJY13VD04=
+github.com/Monibuca/utils/v3 v3.0.0-alpha4/go.mod h1:3xYmhQbgAZBHLyIMteUCd1va+1z/xnd72B585mCaT3c=
 github.com/funny/slab v0.0.0-20180511031532-b1fad5e5d478 h1:Db9StoJ6RZN3YttC0Pm0I4Y5izITRYch3RMbT59BYN0=
 github.com/funny/slab v0.0.0-20180511031532-b1fad5e5d478/go.mod h1:0j1+svBH8ABEIPdUP0AIg4qedsybnXGJBakCEw8cfoo=
 github.com/funny/utest v0.0.0-20161029064919-43870a374500 h1:Z0r1CZnoIWFB/Uiwh1BU5FYmuFe6L5NPi6XWQEmsTRg=
diff --git a/netStream.go b/netStream.go
index b1dc76b..74d79a1 100644
--- a/netStream.go
+++ b/netStream.go
@@ -3,14 +3,15 @@ package rtmp
 import (
 	"bufio"
 	"fmt"
-	"github.com/Monibuca/engine/v3"
-	"github.com/Monibuca/utils/v3"
-	"github.com/Monibuca/utils/v3/codec"
 	"log"
 	"net"
 	"strings"
 	"sync/atomic"
 	"time"
+
+	"github.com/Monibuca/engine/v3"
+	"github.com/Monibuca/utils/v3"
+	"github.com/Monibuca/utils/v3/codec"
 )
 
 func ListenRtmp(addr string) error {
@@ -83,14 +84,20 @@ func processRtmp(conn net.Conn) {
 		return
 	}
 	var rec_audio, rec_video func(*Chunk)
+	var abslouteTs uint32
 	rec_audio = func(msg *Chunk) {
-		var ts_audio uint32
-		va := stream.AudioTracks[0]
+		va := engine.NewAudioTrack()
+		stream.OriginAudioTrack = va
+		var acodec string
 		tmp := msg.Body[0]
-		if va.SoundFormat = tmp >> 4; va.SoundFormat == 10 {
+		soundFormat := tmp >> 4
+		switch soundFormat {
+		case 10:
 			if msg.Body[1] != 0 {
 				return
 			}
+			acodec = "aac"
+			va.SoundFormat = soundFormat
 			config1, config2 := msg.Body[2], msg.Body[3]
 			//audioObjectType = (config1 & 0xF8) >> 3
 			// 1 AAC MAIN 	ISO/IEC 14496-3 subpart 4
@@ -102,28 +109,48 @@ func processRtmp(conn net.Conn) {
 			//frameLengthFlag = (config2 >> 2) & 0x01
 			//dependsOnCoreCoder = (config2 >> 1) & 0x01
 			//extensionFlag = config2 & 0x01
-		} else {
+			va.RtmpTag = msg.Body
+			rec_audio = func(msg *Chunk) {
+				if msg.Timestamp == 0xffffff {
+					abslouteTs += msg.ExtendTimestamp
+				} else {
+					abslouteTs += msg.Timestamp // 绝对时间戳
+				}
+				va.Push(abslouteTs, msg.Body[2:])
+			}
+			stream.AddAudioTrack(acodec, va)
+			return
+		case 7:
+			acodec = "pcma"
+		case 8:
+			acodec = "pcmu"
+		}
+		if acodec != "" {
+			va.RtmpTag = msg.Body
+			va.SoundFormat = soundFormat
 			va.SoundRate = codec.SoundRate[(tmp&0x0c)>>2] // 采样率 0 = 5.5 kHz or 1 = 11 kHz or 2 = 22 kHz or 3 = 44 kHz
 			va.SoundSize = (tmp & 0x02) >> 1              // 采样精度 0 = 8-bit samples or 1 = 16-bit samples
 			va.SoundType = tmp & 0x01                     // 0 单声道，1立体声
-		}
-		va.RtmpTag = msg.Body
-		rec_audio = func(msg *Chunk) {
-			if msg.Timestamp == 0xffffff {
-				ts_audio += msg.ExtendTimestamp
-			} else {
-				ts_audio += msg.Timestamp // 绝对时间戳
+			rec_audio = func(msg *Chunk) {
+				if msg.Timestamp == 0xffffff {
+					abslouteTs += msg.ExtendTimestamp
+				} else {
+					abslouteTs += msg.Timestamp // 绝对时间戳
+				}
+				va.Push(abslouteTs, msg.Body[1:])
 			}
-			stream.PushAudio(ts_audio, msg.Body[2:])
+			stream.AddAudioTrack(acodec, va)
 		}
 	}
 	rec_video = func(msg *Chunk) {
+		codecId := msg.Body[0] & 0x0F
 		// 等待AVC序列帧
-		if msg.Body[1] != 0 {
+		if codecId != 7 && codecId != 12 || msg.Body[1] != 0 {
 			return
 		}
-		vt := stream.VideoTracks[0]
-		var ts_video uint32
+		vt := engine.NewVideoTrack()
+		vt.CodecID = codecId
+		stream.OriginVideoTrack = vt
 		var info codec.AVCDecoderConfigurationRecord
 		//0:codec,1:IsAVCSequence,2~4:compositionTime
 		if _, err := info.Unmarshal(msg.Body[5:]); err == nil {
@@ -133,23 +160,23 @@ func processRtmp(conn net.Conn) {
 		}
 		vt.RtmpTag = msg.Body
 		nalulenSize := int(info.LengthSizeMinusOne&3 + 1)
+		stream.AddVideoTrack("h264", vt)
 		rec_video = func(msg *Chunk) {
 			nalus := msg.Body[5:]
 			if msg.Timestamp == 0xffffff {
-				ts_video += msg.ExtendTimestamp
+				abslouteTs += msg.ExtendTimestamp
 			} else {
-				ts_video += msg.Timestamp // 绝对时间戳
+				abslouteTs += msg.Timestamp // 绝对时间戳
 			}
 			for len(nalus) > nalulenSize {
 				nalulen := 0
 				for i := 0; i < nalulenSize; i++ {
 					nalulen += int(nalus[i]) << (8 * (nalulenSize - i - 1))
 				}
-				vt.Push(ts_video, nalus[nalulenSize:nalulen+nalulenSize])
+				vt.Push(abslouteTs, nalus[nalulenSize:nalulen+nalulenSize])
 				nalus = nalus[nalulen+nalulenSize:]
 			}
 		}
-		close(vt.WaitFirst)
 	}
 	for {
 		if msg, err := nc.RecvMessage(); err == nil {
@@ -185,9 +212,10 @@ func processRtmp(conn net.Conn) {
 					pm := msg.MsgData.(*PlayMessage)
 					streamPath := nc.appName + "/" + strings.Split(pm.StreamName, "?")[0]
 					nc.writeChunkSize = config.ChunkSize
-					var subscriber engine.Subscriber
-					subscriber.Type = "RTMP"
-					subscriber.ID = fmt.Sprintf("%s|%d", conn.RemoteAddr().String(), nc.streamID)
+					subscriber := engine.Subscriber{
+						Type: "RTMP",
+						ID:   fmt.Sprintf("%s|%d", conn.RemoteAddr().String(), nc.streamID),
+					}
 					if err = subscriber.Subscribe(streamPath); err == nil {
 						streams[nc.streamID] = &subscriber
 						err = nc.SendMessage(SEND_CHUNK_SIZE_MESSAGE, uint32(nc.writeChunkSize))
@@ -195,48 +223,40 @@ func processRtmp(conn net.Conn) {
 						err = nc.SendMessage(SEND_STREAM_BEGIN_MESSAGE, nil)
 						err = nc.SendMessage(SEND_PLAY_RESPONSE_MESSAGE, newPlayResponseMessageData(nc.streamID, NetStream_Play_Reset, Level_Status))
 						err = nc.SendMessage(SEND_PLAY_RESPONSE_MESSAGE, newPlayResponseMessageData(nc.streamID, NetStream_Play_Start, Level_Status))
-						vt, at := subscriber.VideoTracks[0], subscriber.AudioTracks[0]
-						err = nc.SendMessage(SEND_FULL_VDIEO_MESSAGE, &AVPack{Payload: vt.RtmpTag})
-						if at.SoundFormat == 10 {
-							err = nc.SendMessage(SEND_FULL_AUDIO_MESSAGE, &AVPack{Payload: at.RtmpTag})
-						}
-						var lastAudioTime, lastVideoTime uint32
-						go (&engine.TrackCP{at, vt}).Play(subscriber.Context, func(pack engine.AudioPack) {
-							if lastAudioTime == 0 {
-								lastAudioTime = pack.Timestamp
-							}
-							t := pack.Timestamp - lastAudioTime
-							lastAudioTime = pack.Timestamp
-							l := len(pack.Payload) + 1
-							if at.SoundFormat == 10 {
-								l++
-							}
-							payload := utils.GetSlice(l)
-							defer utils.RecycleSlice(payload)
-							payload[0] = at.RtmpTag[0]
-							if at.SoundFormat == 10 {
-								payload[1] = 1
-							}
-							copy(payload[2:], pack.Payload)
-							err = nc.SendMessage(SEND_AUDIO_MESSAGE, &AVPack{Timestamp: t, Payload: payload})
-						}, func(pack engine.VideoPack) {
-							if lastVideoTime == 0 {
+						vt, at := subscriber.GetVideoTrack("h264"), subscriber.OriginAudioTrack
+						if vt != nil {
+							var lastVideoTime uint32
+							err = nc.SendMessage(SEND_FULL_VDIEO_MESSAGE, &AVPack{Payload: vt.RtmpTag})
+							subscriber.OnVideo = func(pack engine.VideoPack) {
+								if lastVideoTime == 0 {
+									lastVideoTime = pack.Timestamp
+								}
+								t := pack.Timestamp - lastVideoTime
 								lastVideoTime = pack.Timestamp
+								payload := codec.Nalu2RTMPTag(pack.Payload)
+								defer utils.RecycleSlice(payload)
+								err = nc.SendMessage(SEND_VIDEO_MESSAGE, &AVPack{Timestamp: t, Payload: payload})
 							}
-							t := pack.Timestamp - lastVideoTime
-							lastVideoTime = pack.Timestamp
-							payload := utils.GetSlice(9 + len(pack.Payload))
-							defer utils.RecycleSlice(payload)
-							if pack.NalType == codec.NALU_IDR_Picture {
-								payload[0] = 0x17
-							} else {
-								payload[0] = 0x27
+						}
+						if at != nil {
+							var lastAudioTime uint32
+							var aac byte
+							if at.SoundFormat == 10 {
+								aac = at.RtmpTag[0]
+								err = nc.SendMessage(SEND_FULL_AUDIO_MESSAGE, &AVPack{Payload: at.RtmpTag})
 							}
-							payload[1] = 0x01
-							utils.BigEndian.PutUint32(payload[5:], uint32(len(pack.Payload)))
-							copy(payload[9:], pack.Payload)
-							err = nc.SendMessage(SEND_VIDEO_MESSAGE, &AVPack{Timestamp: t, Payload: payload})
-						})
+							subscriber.OnAudio = func(pack engine.AudioPack) {
+								if lastAudioTime == 0 {
+									lastAudioTime = pack.Timestamp
+								}
+								t := pack.Timestamp - lastAudioTime
+								lastAudioTime = pack.Timestamp
+								payload := codec.Audio2RTMPTag(aac, pack.Payload)
+								defer utils.RecycleSlice(payload)
+								err = nc.SendMessage(SEND_AUDIO_MESSAGE, &AVPack{Timestamp: t, Payload: payload})
+							}
+						}
+						go subscriber.Play(subscriber.Context, at, vt)
 					}
 				case "closeStream":
 					cm := msg.MsgData.(*CURDStreamMessage)