diff --git a/common/frame.go b/common/frame.go
index 2febd7b..ba07aa0 100644
--- a/common/frame.go
+++ b/common/frame.go
@@ -21,7 +21,7 @@ func SplitAnnexB[T ~[]byte](frame T, process func(T), delimiter []byte) {
 		}
 	}
 }
-
+type LIRTP = util.ListItem[RTPFrame]
 type RTPFrame struct {
 	*rtp.Packet
 	Raw []byte
@@ -122,11 +122,11 @@ type AVFrame struct {
 	IFrame    bool
 	PTS       time.Duration
 	DTS       time.Duration
-	Timestamp time.Duration               // 绝对时间戳
-	ADTS      *util.ListItem[util.Buffer] `json:"-" yaml:"-"` // ADTS头
-	AVCC      util.BLL                    `json:"-" yaml:"-"` // 打包好的AVCC格式(MPEG-4格式、Byte-Stream Format)
-	RTP       util.List[RTPFrame]         `json:"-" yaml:"-"`
-	AUList    util.BLLs                   `json:"-" yaml:"-"` // 裸数据
+	Timestamp time.Duration       // 绝对时间戳
+	ADTS      util.LIBP           `json:"-" yaml:"-"` // ADTS头
+	AVCC      util.BLL            `json:"-" yaml:"-"` // 打包好的AVCC格式(MPEG-4格式、Byte-Stream Format)
+	RTP       util.List[RTPFrame] `json:"-" yaml:"-"`
+	AUList    util.BLLs           `json:"-" yaml:"-"` // 裸数据
 }
 
 func NewAVFrame() *AVFrame {
@@ -164,7 +164,7 @@ func (av *AVFrame) Reset() {
 	av.DataFrame.Reset()
 }
 
-func (av *AVFrame) Assign(source *AVFrame)  {
+func (av *AVFrame) Assign(source *AVFrame) {
 	av.IFrame = source.IFrame
 	av.PTS = source.PTS
 	av.DTS = source.DTS
diff --git a/common/type.go b/common/type.go
index 57f5cac..04b7501 100644
--- a/common/type.go
+++ b/common/type.go
@@ -64,13 +64,13 @@ type AVTrack interface {
 	Attach()
 	Detach()
 	WriteAVCC(ts uint32, frame *util.BLL) error //写入AVCC格式的数据
-	WriteRTP(*util.ListItem[RTPFrame])
+	WriteRTP(*LIRTP)
 	WriteRTPPack(*rtp.Packet)
 	WriteSequenceHead(sh []byte) error
 	Flush()
 	SetSpeedLimit(time.Duration)
-	GetRTPFromPool() *util.ListItem[RTPFrame]
-	GetFromPool(util.IBytes) *util.ListItem[util.Buffer]
+	GetRTPFromPool() *LIRTP
+	GetFromPool(util.IBytes) util.LIBP
 }
 type VideoTrack interface {
 	AVTrack
diff --git a/track/aac.go b/track/aac.go
index e71c440..1536cb6 100644
--- a/track/aac.go
+++ b/track/aac.go
@@ -69,7 +69,7 @@ func (aac *AAC) WriteADTS(ts uint32, b util.IBytes) {
 }
 
 // https://datatracker.ietf.org/doc/html/rfc3640#section-3.2.1
-func (aac *AAC) WriteRTPFrame(rtpItem *util.ListItem[RTPFrame]) {
+func (aac *AAC) WriteRTPFrame(rtpItem *LIRTP) {
 	aac.Value.RTP.Push(rtpItem)
 	frame := &rtpItem.Value
 	if len(frame.Payload) < 2 {
diff --git a/track/av1.go b/track/av1.go
index 1be19c4..afb68f9 100644
--- a/track/av1.go
+++ b/track/av1.go
@@ -48,7 +48,7 @@ func (vt *AV1) WriteSequenceHead(head []byte) (err error) {
 	return
 }
 
-func (vt *AV1) WriteRTPFrame(rtpItem *util.ListItem[RTPFrame]) {
+func (vt *AV1) WriteRTPFrame(rtpItem *LIRTP) {
 	defer func() {
 		err := recover()
 		if err != nil {
diff --git a/track/data.go b/track/data.go
index a804e14..ebf3fe0 100644
--- a/track/data.go
+++ b/track/data.go
@@ -99,7 +99,7 @@ func NewRecycleDataTrack[T util.Recyclable](name string) (dt *RecycleData[T]) {
 }
 
 type BytesData struct {
-	RecycleData[*util.ListItem[util.Buffer]]
+	RecycleData[util.LIBP]
 	Pool util.BytesPool
 }
 
diff --git a/track/g711.go b/track/g711.go
index fa44b36..c625a1b 100644
--- a/track/g711.go
+++ b/track/g711.go
@@ -57,7 +57,7 @@ func (g711 *G711) WriteAVCC(ts uint32, frame *util.BLL) error {
 	return nil
 }
 
-func (g711 *G711) WriteRTPFrame(rtpItem *util.ListItem[RTPFrame]) {
+func (g711 *G711) WriteRTPFrame(rtpItem *LIRTP) {
 	frame := &rtpItem.Value
 	g711.Value.RTP.Push(rtpItem)
 	if g711.SampleRate != 90000 {
diff --git a/track/h264.go b/track/h264.go
index b8b09a8..0a11072 100644
--- a/track/h264.go
+++ b/track/h264.go
@@ -110,7 +110,7 @@ func (vt *H264) WriteSequenceHead(head []byte) (err error) {
 	return
 }
 
-func (vt *H264) WriteRTPFrame(rtpItem *util.ListItem[RTPFrame]) {
+func (vt *H264) WriteRTPFrame(rtpItem *LIRTP) {
 	defer func() {
 		err := recover()
 		if err != nil {
@@ -223,7 +223,7 @@ func (vt *H264) CompleteRTP(value *AVFrame) {
 	vt.PacketizeRTP(out...)
 }
 
-func (vt *H264) GetNALU_SEI() (item *util.ListItem[util.Buffer]) {
+func (vt *H264) GetNALU_SEI() (item util.LIBP) {
 	item = vt.BytesPool.Get(1)
 	item.Value[0] = byte(codec.NALU_SEI)
 	return
diff --git a/track/h265.go b/track/h265.go
index 5d1b814..e5e77c9 100644
--- a/track/h265.go
+++ b/track/h265.go
@@ -97,7 +97,7 @@ func (vt *H265) WriteSequenceHead(head []byte) (err error) {
 	return
 }
 
-func (vt *H265) WriteRTPFrame(rtpItem *util.ListItem[RTPFrame]) {
+func (vt *H265) WriteRTPFrame(rtpItem *LIRTP) {
 	defer func() {
 		err := recover()
 		if err != nil {
@@ -218,7 +218,7 @@ func (vt *H265) CompleteRTP(value *AVFrame) {
 	vt.PacketizeRTP(out...)
 }
 
-func (vt *H265) GetNALU_SEI() (item *util.ListItem[util.Buffer]) {
+func (vt *H265) GetNALU_SEI() (item util.LIBP) {
 	item = vt.BytesPool.Get(1)
 	item.Value[0] = 0b10000000 | byte(codec.NAL_UNIT_SEI<<1)
 	return
diff --git a/track/media.go b/track/media.go
index 6ad3f27..3994d8b 100644
--- a/track/media.go
+++ b/track/media.go
@@ -63,11 +63,11 @@ type SpesificTrack interface {
 	CompleteRTP(*AVFrame)
 	CompleteAVCC(*AVFrame)
 	WriteSliceBytes([]byte)
-	WriteRTPFrame(*util.ListItem[RTPFrame])
+	WriteRTPFrame(*LIRTP)
 	generateTimestamp(uint32)
 	WriteSequenceHead([]byte) error
 	writeAVCCFrame(uint32, *util.BLLReader, *util.BLL) error
-	GetNALU_SEI() *util.ListItem[util.Buffer]
+	GetNALU_SEI() util.LIBP
 	Flush()
 }
 
@@ -106,7 +106,7 @@ type Media struct {
 	流速控制
 }
 
-func (av *Media) GetFromPool(b util.IBytes) (item *util.ListItem[util.Buffer]) {
+func (av *Media) GetFromPool(b util.IBytes) (item util.LIBP) {
 	if b.Reuse() {
 		item = av.BytesPool.Get(b.Len())
 		copy(item.Value, b.Bytes())
@@ -116,7 +116,7 @@ func (av *Media) GetFromPool(b util.IBytes) (item *util.ListItem[util.Buffer]) {
 	return
 }
 
-func (av *Media) GetRTPFromPool() (result *util.ListItem[RTPFrame]) {
+func (av *Media) GetRTPFromPool() (result *LIRTP) {
 	result = av.RtpPool.Get()
 	if result.Value.Packet == nil {
 		result.Value.Packet = &rtp.Packet{}
diff --git a/track/opus.go b/track/opus.go
index 127f0bb..d955504 100644
--- a/track/opus.go
+++ b/track/opus.go
@@ -30,7 +30,7 @@ func (opus *Opus) WriteAVCC(ts uint32, frame *util.BLL) error {
 	return errors.New("opus not support WriteAVCC")
 }
 
-func (opus *Opus) WriteRTPFrame(rtpItem *util.ListItem[RTPFrame]) {
+func (opus *Opus) WriteRTPFrame(rtpItem *LIRTP) {
 	frame := &rtpItem.Value
 	opus.Value.RTP.Push(rtpItem)
 	if opus.SampleRate != 90000 {
diff --git a/track/rtp.go b/track/rtp.go
index b739b07..579825a 100644
--- a/track/rtp.go
+++ b/track/rtp.go
@@ -28,7 +28,7 @@ func (av *Media) WriteRTPPack(p *rtp.Packet) {
 }
 
 // WriteRTPFrame 写入未反序列化的RTP包, 未排序的
-func (av *Media) WriteRTP(raw *util.ListItem[RTPFrame]) {
+func (av *Media) WriteRTP(raw *LIRTP) {
 	for frame := av.recorderRTP(raw); frame != nil; frame = av.nextRTPFrame() {
 		frame.Value.SSRC = av.SSRC
 		av.Value.BytesIn += len(frame.Value.Payload) + 12
@@ -46,7 +46,7 @@ func (av *Media) WriteRTP(raw *util.ListItem[RTPFrame]) {
 // https://www.cnblogs.com/moonwalk/p/15903760.html
 // Packetize packetizes the payload of an RTP packet and returns one or more RTP packets
 func (av *Media) PacketizeRTP(payloads ...[][]byte) {
-	var rtpItem *util.ListItem[RTPFrame]
+	var rtpItem *LIRTP
 	for _, pp := range payloads {
 		rtpItem = av.GetRTPFromPool()
 		packet := &rtpItem.Value
@@ -78,11 +78,11 @@ func (av *Media) PacketizeRTP(payloads ...[][]byte) {
 type RTPDemuxer struct {
 	lastSeq  uint16 //上一个rtp包的序号
 	lastSeq2 uint16 //上上一个rtp包的序号
-	乱序重排     util.RTPReorder[*util.ListItem[RTPFrame]]
+	乱序重排     util.RTPReorder[*LIRTP]
 }
 
 // 获取缓存中下一个rtpFrame
-func (av *RTPDemuxer) nextRTPFrame() (frame *util.ListItem[RTPFrame]) {
+func (av *RTPDemuxer) nextRTPFrame() (frame *LIRTP) {
 	frame = av.乱序重排.Pop()
 	if frame == nil {
 		return
@@ -93,7 +93,7 @@ func (av *RTPDemuxer) nextRTPFrame() (frame *util.ListItem[RTPFrame]) {
 }
 
 // 对RTP包乱序重排
-func (av *RTPDemuxer) recorderRTP(item *util.ListItem[RTPFrame]) (frame *util.ListItem[RTPFrame]) {
+func (av *RTPDemuxer) recorderRTP(item *LIRTP) (frame *LIRTP) {
 	frame = av.乱序重排.Push(item.Value.SequenceNumber, item)
 	if frame == nil {
 		return
diff --git a/util/pool.go b/util/pool.go
index c4f6232..ee5d92a 100644
--- a/util/pool.go
+++ b/util/pool.go
@@ -11,12 +11,12 @@ type Recyclable interface {
 	Recycle()
 }
 type BLLReader struct {
-	*ListItem[Buffer]
+	LIBP
 	pos int
 }
 
 func (r *BLLReader) CanRead() bool {
-	return r.ListItem != nil && !r.IsRoot()
+	return r.LIBP != nil && !r.IsRoot()
 }
 
 func (r *BLLReader) Skip(n int) (err error) {
@@ -27,7 +27,7 @@ func (r *BLLReader) Skip(n int) (err error) {
 			return
 		}
 		n -= l
-		r.ListItem = r.Next
+		r.LIBP = r.Next
 		r.pos = 0
 	}
 	return io.EOF
@@ -41,7 +41,7 @@ func (r *BLLReader) ReadByte() (b byte, err error) {
 			r.pos++
 			return
 		}
-		r.ListItem = r.Next
+		r.LIBP = r.Next
 		r.pos = 0
 	}
 	return 0, io.EOF
@@ -88,7 +88,7 @@ func (r *BLLReader) ReadN(n int) (result net.Buffers) {
 		}
 		result = append(result, r.Value[r.pos:])
 		n -= l
-		r.ListItem = r.Next
+		r.LIBP = r.Next
 		r.pos = 0
 	}
 	return
@@ -105,7 +105,7 @@ func (r *BLLReader) WriteNTo(n int, result *net.Buffers) (actual int) {
 		}
 		*result = append(*result, r.Value[r.pos:])
 		n -= l
-		r.ListItem = r.Next
+		r.LIBP = r.Next
 		r.pos = 0
 	}
 	return actual - n
@@ -152,7 +152,7 @@ func (list *BLLs) PushValue(item *BLL) {
 	list.ByteLength += item.ByteLength
 }
 
-func (list *BLLs) Push(item *ListItem[Buffer]) {
+func (list *BLLs) Push(item LIBP) {
 	if list == nil {
 		return
 	}
@@ -220,7 +220,7 @@ func (list *BLL) NewReader() *BLLReader {
 // 	list.ByteLength += list2.ByteLength
 // }
 
-func (list *BLL) Push(item *ListItem[Buffer]) {
+func (list *BLL) Push(item LIBP) {
 	if list == nil {
 		return
 	}
@@ -228,7 +228,7 @@ func (list *BLL) Push(item *ListItem[Buffer]) {
 	list.ByteLength += item.Value.Len()
 }
 
-func (list *BLL) Shift() (item *ListItem[Buffer]) {
+func (list *BLL) Shift() (item LIBP) {
 	if list == nil || list.Length == 0 {
 		return
 	}
@@ -304,7 +304,7 @@ func (list *BLL) GetUintN(index int, n int) (result uint32) {
 type BytesPool []List[Buffer]
 
 // 获取来自真实内存的切片的——假内存块，即只回收外壳
-func (p BytesPool) GetShell(b []byte) (item *ListItem[Buffer]) {
+func (p BytesPool) GetShell(b []byte) (item LIBP) {
 	if len(p) == 0 {
 		return &ListItem[Buffer]{Value: b}
 	}
@@ -314,7 +314,7 @@ func (p BytesPool) GetShell(b []byte) (item *ListItem[Buffer]) {
 	return
 }
 
-func (p BytesPool) Get(size int) (item *ListItem[Buffer]) {
+func (p BytesPool) Get(size int) (item LIBP) {
 	for i := 1; i < len(p); i++ {
 		if level := 1 << i; level >= size {
 			if item = p[i].PoolShift(); cap(item.Value) > 0 {
@@ -340,3 +340,6 @@ type Pool[T any] List[T]
 func (p *Pool[T]) Get() (item *ListItem[T]) {
 	return (*List[T])(p).PoolShift()
 }
+
+type LIB = ListItem[Buffer]
+type LIBP = *LIB
\ No newline at end of file