diff --git a/common/index.go b/common/index.go
index c72ff10..150dff9 100644
--- a/common/index.go
+++ b/common/index.go
@@ -76,7 +76,7 @@ type AVTrack interface {
 	CurrentFrame() *AVFrame
 	Attach()
 	Detach()
-	WriteAVCC(ts uint32, frame util.BLL) //写入AVCC格式的数据
+	WriteAVCC(ts uint32, frame util.BLL) error //写入AVCC格式的数据
 	WriteRTP([]byte)
 	WriteRTPPack(*rtp.Packet)
 	Flush()
diff --git a/subscriber.go b/subscriber.go
index 5da7d94..829cc91 100644
--- a/subscriber.go
+++ b/subscriber.go
@@ -27,12 +27,16 @@ const (
 	SUBSTATE_NORMAL
 )
 
+// AVCC 格式的序列帧
 type VideoDeConf []byte
+
+// AVCC 格式的序列帧
 type AudioDeConf []byte
 type AudioFrame struct {
 	*AVFrame
 	AbsTime uint32
 	PTS     uint32
+	DTS     uint32
 }
 type VideoFrame struct {
 	*AVFrame
@@ -168,13 +172,13 @@ func (s *Subscriber) PlayBlock(subType byte) {
 	s.TrackPlayer.Context, s.TrackPlayer.CancelFunc = context.WithCancel(s.IO)
 	ctx := s.TrackPlayer.Context
 	sendVideoDecConf := func() {
+		spesic.OnEvent(s.Video.ParamaterSets)
 		spesic.OnEvent(VideoDeConf(s.VideoReader.Track.SequenceHead))
 	}
 	sendAudioDecConf := func() {
 		spesic.OnEvent(AudioDeConf(s.AudioReader.Track.SequenceHead))
 	}
-	var sendVideoFrame func(*AVFrame)
-	var sendAudioFrame func(*AVFrame)
+	var sendAudioFrame, sendVideoFrame func(*AVFrame)
 	switch subType {
 	case SUBTYPE_RAW:
 		sendVideoFrame = func(frame *AVFrame) {
@@ -183,7 +187,7 @@ func (s *Subscriber) PlayBlock(subType byte) {
 		}
 		sendAudioFrame = func(frame *AVFrame) {
 			// println("a", frame.Sequence, s.AudioReader.AbsTime)
-			spesic.OnEvent(AudioFrame{frame, s.AudioReader.AbsTime, frame.DTS - s.VideoReader.SkipTs*90})
+			spesic.OnEvent(AudioFrame{frame, s.AudioReader.AbsTime, s.AudioReader.AbsTime * 90, s.AudioReader.AbsTime * 90})
 		}
 	case SUBTYPE_RTP:
 		var videoSeq, audioSeq uint16
@@ -201,7 +205,7 @@ func (s *Subscriber) PlayBlock(subType byte) {
 				audioSeq++
 				vp := *p
 				vp.Header.SequenceNumber = audioSeq
-				vp.Header.Timestamp = vp.Header.Timestamp - s.VideoReader.SkipTs*90
+				vp.Header.Timestamp = vp.Header.Timestamp - s.AudioReader.SkipTs*90
 				spesic.OnEvent((AudioRTP)(vp))
 			}
 		}
@@ -225,10 +229,11 @@ func (s *Subscriber) PlayBlock(subType byte) {
 			// spesic.OnEvent(FLVFrame(copyBuffers(s.Audio.Track.DecoderConfiguration.FLV)))
 		}
 		sendVideoFrame = func(frame *AVFrame) {
-			// println(frame.Sequence, frame.AbsTime, frame.DeltaTime, frame.IFrame)
+			// println(frame.Sequence, s.VideoReader.AbsTime, frame.DeltaTime, frame.IFrame)
 			sendFlvFrame(codec.FLV_TAG_TYPE_VIDEO, s.VideoReader.AbsTime, frame.AVCC.ToBuffers()...)
 		}
 		sendAudioFrame = func(frame *AVFrame) {
+			// println(frame.Sequence, s.AudioReader.AbsTime, frame.DeltaTime)
 			sendFlvFrame(codec.FLV_TAG_TYPE_AUDIO, s.AudioReader.AbsTime, frame.AVCC.ToBuffers()...)
 		}
 	}
@@ -237,32 +242,49 @@ func (s *Subscriber) PlayBlock(subType byte) {
 	if s.Args.Has(s.Config.SubModeArgName) {
 		subMode, _ = strconv.Atoi(s.Args.Get(s.Config.SubModeArgName))
 	}
+	var videoFrame, audioFrame *AVFrame
 	for ctx.Err() == nil {
 		hasVideo, hasAudio := s.VideoReader.Track != nil && s.Config.SubVideo, s.AudioReader.Track != nil && s.Config.SubAudio
 		if hasVideo {
+			if videoFrame != nil {
+				sendVideoFrame(videoFrame)
+				videoFrame = nil
+			}
 			for ctx.Err() == nil {
 				s.VideoReader.Read(ctx, subMode)
 				frame := s.VideoReader.Frame
 				// println("video", frame.Sequence, frame.AbsTime)
-				if frame == nil {
+				if frame == nil || ctx.Err() != nil {
 					return
 				}
+				if audioFrame != nil {
+					if frame.AbsTime > audioFrame.AbsTime {
+						sendAudioFrame(audioFrame)
+						audioFrame = nil
+					}
+				}
 				if frame.IFrame && s.VideoReader.DecConfChanged() {
 					s.VideoReader.ConfSeq = s.VideoReader.Track.SequenceHeadSeq
 					// println(s.Video.confSeq, s.Video.Track.SPSInfo.Width, s.Video.Track.SPSInfo.Height)
 					sendVideoDecConf()
 				}
 				if !s.Config.IFrameOnly || frame.IFrame {
-					sendVideoFrame(frame)
-				}
-				if frame.AbsTime > lastPlayAbsTime {
-					lastPlayAbsTime = frame.AbsTime
-					break
+					if frame.AbsTime > lastPlayAbsTime {
+						lastPlayAbsTime = frame.AbsTime
+						videoFrame = frame
+						break
+					} else {
+						sendVideoFrame(frame)
+					}
 				}
 			}
 		}
 		// 正常模式下或者纯音频模式下，音频开始播放
 		if hasAudio {
+			if audioFrame != nil {
+				sendAudioFrame(audioFrame)
+				audioFrame = nil
+			}
 			for ctx.Err() == nil {
 				switch s.AudioReader.State {
 				case track.READSTATE_INIT:
@@ -277,17 +299,25 @@ func (s *Subscriber) PlayBlock(subType byte) {
 				s.AudioReader.Read(ctx, subMode)
 				frame := s.AudioReader.Frame
 				// println("audio", frame.Sequence, frame.AbsTime)
-				if frame == nil {
+				if frame == nil || ctx.Err() != nil {
 					return
 				}
+				if videoFrame != nil {
+					if frame.AbsTime > videoFrame.AbsTime {
+						sendVideoFrame(videoFrame)
+						videoFrame = nil
+					}
+				}
 				if s.AudioReader.DecConfChanged() {
 					s.AudioReader.ConfSeq = s.AudioReader.Track.SequenceHeadSeq
 					sendAudioDecConf()
 				}
-				sendAudioFrame(frame)
 				if frame.AbsTime > lastPlayAbsTime {
 					lastPlayAbsTime = frame.AbsTime
+					audioFrame = frame
 					break
+				} else {
+					sendAudioFrame(frame)
 				}
 			}
 		}
diff --git a/track/aac.go b/track/aac.go
index c3f35e4..d467be1 100644
--- a/track/aac.go
+++ b/track/aac.go
@@ -1,6 +1,7 @@
 package track
 
 import (
+	"io"
 	"net"
 	"time"
 
@@ -100,10 +101,10 @@ func (aac *AAC) WriteAVCCSequenceHead(sh []byte) {
 	aac.WriteSequenceHead(append([]byte{0xAF, 0x00}, sh...))
 }
 
-func (aac *AAC) WriteAVCC(ts uint32, frame util.BLL) {
+func (aac *AAC) WriteAVCC(ts uint32, frame util.BLL) error {
 	if l := frame.ByteLength; l < 4 {
 		aac.Stream.Error("AVCC data too short", zap.Int("len", l))
-		return
+		return io.ErrShortWrite
 	}
 	if frame.GetByte(1) == 0 {
 		aac.WriteSequenceHead(frame.ToBytes())
@@ -114,6 +115,7 @@ func (aac *AAC) WriteAVCC(ts uint32, frame util.BLL) {
 		aac.AppendAuBytes(au...)
 		aac.Audio.WriteAVCC(ts, frame)
 	}
+	return nil
 }
 
 func (aac *AAC) CompleteRTP(value *AVFrame) {
diff --git a/track/base.go b/track/base.go
index f0ee042..4c038fc 100644
--- a/track/base.go
+++ b/track/base.go
@@ -93,7 +93,7 @@ func (av *Media) SnapForJson() {
 		av.RawPart = av.RawPart[:0]
 	}
 	av.RawSize = v.AUList.ByteLength
-	r := v.AUList.Next.Value.NewReader()
+	r := v.AUList.NewReader()
 	for b, err := r.ReadByte(); err == nil && len(av.RawPart) < 10; b, err = r.ReadByte() {
 		av.RawPart = append(av.RawPart, int(b))
 	}
diff --git a/track/g711.go b/track/g711.go
index 17d5f4c..d89870e 100644
--- a/track/g711.go
+++ b/track/g711.go
@@ -1,6 +1,7 @@
 package track
 
 import (
+	"io"
 	"time"
 
 	"go.uber.org/zap"
@@ -36,17 +37,18 @@ type G711 struct {
 	Audio
 }
 
-func (g711 *G711) WriteAVCC(ts uint32, frame util.BLL) {
+func (g711 *G711) WriteAVCC(ts uint32, frame util.BLL) error {
 	if l := frame.ByteLength; l < 2 {
 		g711.Stream.Error("AVCC data too short", zap.Int("len", l))
-		return
+		return io.ErrShortWrite
 	}
 	g711.Value.AUList.Push(g711.BytesPool.GetShell(frame.Next.Value[1:]))
-	frame.Next.Range(func(v util.BLI) bool {
+	frame.Range(func(v util.BLI) bool {
 		g711.Value.AUList.Push(g711.BytesPool.GetShell(v))
 		return true
 	})
 	g711.Audio.WriteAVCC(ts, frame)
+	return nil
 }
 
 func (g711 *G711) WriteRTPFrame(frame *RTPFrame) {
diff --git a/track/h264.go b/track/h264.go
index 8d5ace5..852c207 100644
--- a/track/h264.go
+++ b/track/h264.go
@@ -1,6 +1,7 @@
 package track
 
 import (
+	"io"
 	"time"
 
 	"go.uber.org/zap"
@@ -65,22 +66,23 @@ func (vt *H264) WriteSliceBytes(slice []byte) {
 	case codec.NALU_SEI:
 		vt.AppendAuBytes(slice)
 	case codec.NALU_Access_Unit_Delimiter:
+	case codec.NALU_Filler_Data:
 	default:
 		vt.Stream.Error("H264 WriteSliceBytes naluType not support", zap.Int("naluType", int(naluType)))
 	}
 }
 
-func (vt *H264) WriteAVCC(ts uint32, frame util.BLL) {
+func (vt *H264) WriteAVCC(ts uint32, frame util.BLL) (err error) {
 	if l := frame.ByteLength; l < 6 {
 		vt.Stream.Error("AVCC data too short", zap.Int("len", l))
-		return
+		return io.ErrShortWrite
 	}
 	if frame.GetByte(1) == 0 {
 		vt.SequenceHead = frame.ToBytes()
 		frame.Recycle()
 		vt.updateSequeceHead()
 		var info codec.AVCDecoderConfigurationRecord
-		if _, err := info.Unmarshal(vt.SequenceHead[5:]); err == nil {
+		if _, err = info.Unmarshal(vt.SequenceHead[5:]); err == nil {
 			vt.SPSInfo, _ = codec.ParseSPS(info.SequenceParameterSetNALUnit)
 			vt.nalulenSize = int(info.LengthSizeMinusOne&3 + 1)
 			vt.SPS = info.SequenceParameterSetNALUnit
@@ -91,8 +93,9 @@ func (vt *H264) WriteAVCC(ts uint32, frame util.BLL) {
 			vt.Stream.Error("H264 ParseSpsPps Error")
 			vt.Stream.Close()
 		}
+		return
 	} else {
-		vt.Video.WriteAVCC(ts, frame)
+		return vt.Video.WriteAVCC(ts, frame)
 	}
 }
 
diff --git a/track/h265.go b/track/h265.go
index d3d2ba5..6394e6d 100644
--- a/track/h265.go
+++ b/track/h265.go
@@ -1,6 +1,7 @@
 package track
 
 import (
+	"io"
 	"time"
 
 	"go.uber.org/zap"
@@ -62,27 +63,25 @@ func (vt *H265) WriteSliceBytes(slice []byte) {
 	}
 }
 
-func (vt *H265) WriteAVCC(ts uint32, frame util.BLL) {
+func (vt *H265) WriteAVCC(ts uint32, frame util.BLL) (err error) {
 	if l := frame.ByteLength; l < 6 {
 		vt.Stream.Error("AVCC data too short", zap.Int("len", l))
-		return
+		return io.ErrShortWrite
 	}
 	if frame.GetByte(1) == 0 {
 		vt.SequenceHead = frame.ToBytes()
 		frame.Recycle()
 		vt.updateSequeceHead()
-		if vps, sps, pps, err := codec.ParseVpsSpsPpsFromSeqHeaderWithoutMalloc(vt.SequenceHead); err == nil {
+		if vt.VPS, vt.SPS, vt.PPS, err = codec.ParseVpsSpsPpsFromSeqHeaderWithoutMalloc(vt.SequenceHead); err == nil {
 			vt.SPSInfo, _ = codec.ParseHevcSPS(vt.SequenceHead)
 			vt.nalulenSize = (int(vt.SequenceHead[26]) & 0x03) + 1
-			vt.VPS = vps
-			vt.SPS = sps
-			vt.PPS = pps
 		} else {
 			vt.Stream.Error("H265 ParseVpsSpsPps Error")
 			vt.Stream.Close()
 		}
+		return
 	} else {
-		vt.Video.WriteAVCC(ts, frame)
+		return vt.Video.WriteAVCC(ts, frame)
 	}
 }
 
diff --git a/track/video.go b/track/video.go
index 2568415..5d7b134 100644
--- a/track/video.go
+++ b/track/video.go
@@ -101,11 +101,11 @@ func (vt *Video) WriteAnnexB(pts uint32, dts uint32, frame AnnexBFrame) {
 	vt.Flush()
 }
 
-func (vt *Video) WriteAVCC(ts uint32, frame util.BLL) {
+func (vt *Video) WriteAVCC(ts uint32, frame util.BLL) error {
 	r := frame.NewReader()
 	b, err := r.ReadByte()
 	if err != nil {
-		return
+		return err
 	}
 	b = b >> 4
 	vt.Value.IFrame = b == 1 || b == 4
@@ -113,13 +113,14 @@ func (vt *Video) WriteAVCC(ts uint32, frame util.BLL) {
 	vt.Value.WriteAVCC(ts, frame)
 	cts, err := r.ReadBE(3)
 	if err != nil {
-		return
+		return err
 	}
 	vt.Value.PTS = (ts + cts) * 90
 	for nalulen, err := r.ReadBE(vt.nalulenSize); err == nil; nalulen, err = r.ReadBE(vt.nalulenSize) {
 		vt.AppendAuBytes(r.ReadN(int(nalulen))...)
 	}
 	vt.Flush()
+	return nil
 }
 
 func (vt *Video) WriteSliceByte(b ...byte) {
diff --git a/util/amf.go b/util/amf.go
index 121e7aa..498f3c3 100644
--- a/util/amf.go
+++ b/util/amf.go
@@ -83,27 +83,29 @@ type AMF struct {
 	Buffer
 }
 
-func (amf *AMF) ReadShortString() string {
-	value, _ := amf.Unmarshal()
-	return value.(string)
-}
-
-func (amf *AMF) ReadNumber() float64 {
-	value, _ := amf.Unmarshal()
-	return value.(float64)
-}
-
-func (amf *AMF) ReadObject() map[string]any {
-	value, _ := amf.Unmarshal()
-	if value == nil {
-		return nil
+func ReadAMF[T any](amf *AMF) (result T) {
+	value, err := amf.Unmarshal()
+	if err != nil {
+		return
 	}
-	return value.(map[string]any)
+	result, _ = value.(T)
+	return
 }
 
-func (amf *AMF) ReadBool() bool {
-	value, _ := amf.Unmarshal()
-	return value.(bool)
+func (amf *AMF) ReadShortString() (result string) {
+	return ReadAMF[string](amf)
+}
+
+func (amf *AMF) ReadNumber() (result float64) {
+	return ReadAMF[float64](amf)
+}
+
+func (amf *AMF) ReadObject() (result map[string]any) {
+	return ReadAMF[map[string]any](amf)
+}
+
+func (amf *AMF) ReadBool() (result bool) {
+	return ReadAMF[bool](amf)
 }
 
 func (amf *AMF) readKey() (string, error) {
diff --git a/util/pool.go b/util/pool.go
index 9b37d8f..965b5f2 100644
--- a/util/pool.go
+++ b/util/pool.go
@@ -69,6 +69,29 @@ func (r *BLLReader) ReadN(n int) (result net.Buffers) {
 	return
 }
 
+type BLLsReader struct {
+	*ListItem[*BLL]
+	BLLReader
+}
+
+func (r *BLLsReader) CanRead() bool {
+	return r.ListItem != nil && !r.IsRoot()
+}
+
+func (r *BLLsReader) ReadByte() (b byte, err error)  {
+	if r.BLLReader.CanRead() {
+		b, err = r.BLLReader.ReadByte()
+		if err == nil {
+			return
+		}
+	}
+	r.ListItem = r.Next
+	if !r.CanRead() {
+		return 0, io.EOF
+	}
+	r.BLLReader = *r.Value.NewReader()
+	return r.BLLReader.ReadByte()
+}
 type BLLs struct {
 	List[*BLL]
 	ByteLength int
@@ -121,6 +144,10 @@ func (list *BLLs) Recycle() {
 	list.ByteLength = 0
 }
 
+func (list *BLLs) NewReader() *BLLsReader {
+	return &BLLsReader{list.Next, *list.Next.Value.NewReader()}
+}
+
 // ByteLinkList
 type BLL struct {
 	List[BLI]