diff --git a/extension/frame.go b/extension/frame.go
new file mode 100644
index 0000000..dc1bd38
--- /dev/null
+++ b/extension/frame.go
@@ -0,0 +1,371 @@
+package extension
+
+import (
+	"sync"
+	"time"
+)
+
+// ==================== 媒体类型定义 ====================
+
+type TrackType int
+
+const (
+	TrackInvalid TrackType = iota - 1
+	TrackVideo
+	TrackAudio
+	TrackTitle
+	TrackApplication
+)
+
+func (t TrackType) String() string {
+	switch t {
+	case TrackVideo:
+		return "video"
+	case TrackAudio:
+		return "audio"
+	case TrackApplication:
+		return "application"
+	default:
+		return "invalid"
+	}
+}
+
+func GetTrackType(str string) TrackType {
+	switch str {
+	case "video":
+		return TrackVideo
+	case "audio":
+		return TrackAudio
+	case "application":
+		return TrackApplication
+	default:
+		return TrackInvalid
+	}
+}
+
+// ==================== 编解码标识 ====================
+
+type CodecID int
+
+const (
+	CodecInvalid CodecID = iota - 1
+	CodecH264
+	CodecH265
+	CodecAAC
+	CodecG711A
+	CodecG711U
+	CodecOpus
+	// ... 其他编解码器定义
+)
+
+var codecNames = map[CodecID]string{
+	CodecH264:  "H264",
+	CodecH265:  "H265",
+	CodecAAC:   "mpeg4-generic",
+	CodecG711A: "PCMA",
+	CodecG711U: "PCMU",
+	CodecOpus:  "opus",
+}
+
+func (c CodecID) String() string {
+	if name, ok := codecNames[c]; ok {
+		return name
+	}
+	return "invalid"
+}
+
+func GetCodecID(name string) CodecID {
+	for cid, n := range codecNames {
+		if n == name {
+			return cid
+		}
+	}
+	return CodecInvalid
+}
+
+// ==================== 帧接口定义 ====================
+
+type Frame interface {
+	DTS() uint64
+	PTS() uint64
+	PrefixSize() int
+	KeyFrame() bool
+	ConfigFrame() bool
+	CacheAble() bool
+	DropAble() bool
+	DecodeAble() bool
+	Data() []byte
+	Size() int
+	CodecID() CodecID
+	TrackType() TrackType
+}
+
+// ==================== 基础帧实现 ====================
+
+type BaseFrame struct {
+	Dts         uint64
+	Pts         uint64
+	VPrefixSize int
+	Codec       CodecID
+	Track       TrackType
+}
+
+func (f *BaseFrame) DTS() uint64          { return f.Dts }
+func (f *BaseFrame) PTS() uint64          { return f.Pts }
+func (f *BaseFrame) PrefixSize() int      { return f.VPrefixSize }
+func (f *BaseFrame) CodecID() CodecID     { return f.Codec }
+func (f *BaseFrame) TrackType() TrackType { return f.Track }
+
+// ==================== 帧包装器 ====================
+
+type FrameFromBytes struct {
+	*BaseFrame
+	DataPtr  []byte
+	IsKey    bool
+	IsConfig bool
+}
+
+func (f *FrameFromBytes) KeyFrame() bool    { return f.IsKey }
+func (f *FrameFromBytes) ConfigFrame() bool { return f.IsConfig }
+func (f *FrameFromBytes) CacheAble() bool   { return false }
+func (f *FrameFromBytes) DropAble() bool    { return false }
+func (f *FrameFromBytes) DecodeAble() bool {
+	if f.TrackType() != TrackVideo {
+		return true
+	}
+	return !f.ConfigFrame()
+}
+func (f *FrameFromBytes) Data() []byte { return f.DataPtr }
+func (f *FrameFromBytes) Size() int    { return len(f.DataPtr) }
+
+// ==================== 可缓存帧 ====================
+
+type FrameCacheAble struct {
+	*FrameFromBytes
+	Buffer []byte
+}
+
+func NewFrameCacheAble(frame Frame, forceKeyFrame bool) Frame {
+	if frame.CacheAble() {
+		return frame
+	}
+
+	buffer := make([]byte, frame.Size())
+	copy(buffer, frame.Data())
+
+	return &FrameCacheAble{
+		FrameFromBytes: &FrameFromBytes{
+			BaseFrame: &BaseFrame{
+				Dts:         frame.DTS(),
+				Pts:         frame.PTS(),
+				VPrefixSize: frame.PrefixSize(),
+				Codec:       frame.CodecID(),
+				Track:       frame.TrackType(),
+			},
+			DataPtr:  buffer,
+			IsKey:    forceKeyFrame || frame.KeyFrame(),
+			IsConfig: frame.ConfigFrame(),
+		},
+		Buffer: buffer,
+	}
+}
+
+func (f *FrameCacheAble) CacheAble() bool { return true }
+
+// ==================== 时间戳修正 ====================
+
+type FrameStamp struct {
+	Frame
+	Dts int64
+	Pts int64
+}
+
+func NewFrameStamp(frame Frame, dts, pts int64) Frame {
+	return &FrameStamp{Frame: frame, Dts: dts, Pts: pts}
+}
+
+func (f *FrameStamp) DTS() uint64 { return uint64(f.Dts) }
+func (f *FrameStamp) PTS() uint64 { return uint64(f.Pts) }
+
+// ==================== 帧合并器 ====================
+
+type FrameMerger struct {
+	frameCache     []Frame
+	haveDecodeable bool
+	mergeType      int
+}
+
+const (
+	MergeNone = iota
+	MergeH264Prefix
+	MergeMP4NalSize
+)
+
+func NewFrameMerger(mergeType int) *FrameMerger {
+	return &FrameMerger{mergeType: mergeType}
+}
+
+func (m *FrameMerger) WillFlush(frame Frame) bool {
+	if len(m.frameCache) == 0 {
+		return false
+	}
+	if frame == nil {
+		return true
+	}
+
+	last := m.frameCache[len(m.frameCache)-1]
+	switch m.mergeType {
+	case MergeNone:
+		return last.DTS() != frame.DTS() || len(m.frameCache) > 100
+	case MergeH264Prefix, MergeMP4NalSize:
+		return last.DTS() != frame.DTS() || frame.DecodeAble() || frame.ConfigFrame() || len(m.frameCache) > 100
+	default:
+		return true
+	}
+}
+
+func (m *FrameMerger) DoMerge(buffer *[]byte, frame Frame) {
+	switch m.mergeType {
+	case MergeNone:
+		*buffer = append(*buffer, frame.Data()...)
+	case MergeH264Prefix:
+		if frame.PrefixSize() == 0 {
+			*buffer = append(*buffer, 0, 0, 0, 1)
+		}
+		// 确保每个NAL单元都有独立的起始码
+		*buffer = append(*buffer, frame.Data()...)
+	case MergeMP4NalSize:
+		size := uint32(frame.Size() - frame.PrefixSize())
+		*buffer = append(*buffer, byte(size>>24), byte(size>>16), byte(size>>8), byte(size))
+		*buffer = append(*buffer, frame.Data()[frame.PrefixSize():]...)
+	}
+}
+
+func (m *FrameMerger) InputFrame(frame Frame, cb func(dts, pts uint64, buffer []byte, haveKeyFrame bool)) bool {
+	if frame == nil {
+		return false
+	}
+
+	if frame.DecodeAble() {
+		m.haveDecodeable = true
+	}
+	m.frameCache = append(m.frameCache, frame)
+
+	if frame != nil && !m.NeedMerge(frame.CodecID()) {
+		cb(frame.DTS(), frame.PTS(), frame.Data(), frame.KeyFrame())
+		return true
+	}
+
+	if m.WillFlush(frame) {
+		last := m.frameCache[len(m.frameCache)-1]
+		var buffer []byte
+		var haveKeyFrame = last.KeyFrame()
+
+		if len(m.frameCache) > 1 || m.mergeType == MergeMP4NalSize {
+			buffer = make([]byte, 0, last.Size()+1024)
+			for _, f := range m.frameCache {
+				m.DoMerge(&buffer, f)
+				if f.KeyFrame() {
+					haveKeyFrame = true
+				}
+			}
+			cb(last.DTS(), last.PTS(), buffer, haveKeyFrame)
+			m.frameCache = m.frameCache[:0]
+			m.haveDecodeable = false
+		}
+
+	}
+
+	return true
+}
+
+func (m *FrameMerger) NeedMerge(codec CodecID) bool {
+	return codec == CodecH264 || codec == CodecH265
+}
+
+func (m *FrameMerger) Flush(cb func(dts, pts uint64, buffer []byte, haveKeyFrame bool)) {
+	if len(m.frameCache) > 0 {
+		m.InputFrame(nil, cb)
+	}
+	m.frameCache = m.frameCache[:0]
+	m.haveDecodeable = false
+}
+
+// ==================== 帧分发器 ====================
+
+type FrameDispatcher struct {
+	delegates map[*FrameWriter]bool
+	mtx       sync.Mutex
+	// 统计信息
+	videoKeyFrames uint64
+	frames         uint64
+	lastFrames     uint64
+	gopSize        uint64
+	gopInterval    time.Duration
+	lastKeyFrameTS uint64
+}
+
+func NewFrameDispatcher() *FrameDispatcher {
+	return &FrameDispatcher{delegates: make(map[*FrameWriter]bool)}
+}
+
+func (d *FrameDispatcher) AddDelegate(w *FrameWriter) {
+	d.mtx.Lock()
+	defer d.mtx.Unlock()
+	d.delegates[w] = true
+}
+
+func (d *FrameDispatcher) DelDelegate(w *FrameWriter) {
+	d.mtx.Lock()
+	defer d.mtx.Unlock()
+	delete(d.delegates, w)
+}
+
+func (d *FrameDispatcher) InputFrame(frame Frame) bool {
+	if !frame.ConfigFrame() && !frame.DropAble() {
+		d.frames++
+		if frame.KeyFrame() && frame.TrackType() == TrackVideo {
+			d.videoKeyFrames++
+			d.gopSize = d.frames - d.lastFrames
+			d.gopInterval = time.Duration(frame.DTS()-d.lastKeyFrameTS) * time.Millisecond
+			d.lastFrames = d.frames
+			d.lastKeyFrameTS = frame.DTS()
+		}
+	}
+
+	d.mtx.Lock()
+	defer d.mtx.Unlock()
+
+	var ret bool
+	for w := range d.delegates {
+		if w.InputFrame(frame) {
+			ret = true
+		}
+	}
+	return ret
+}
+
+func (d *FrameDispatcher) GetStats() (uint64, uint64, uint64, time.Duration) {
+	return d.frames, d.videoKeyFrames, d.gopSize, d.gopInterval
+}
+
+// Size 返回当前注册的代理数量
+// Size returns the number of registered delegates
+func (d *FrameDispatcher) Size() int {
+	d.mtx.Lock()
+	defer d.mtx.Unlock()
+	return len(d.delegates)
+}
+
+// ==================== 帧写入接口 ====================
+
+type FrameWriter struct {
+	OnFrame func(Frame) bool
+}
+
+func (w *FrameWriter) InputFrame(frame Frame) bool {
+	if w.OnFrame != nil {
+		return w.OnFrame(frame)
+	}
+	return false
+}
diff --git a/extension/frame_test.go b/extension/frame_test.go
new file mode 100644
index 0000000..09be02e
--- /dev/null
+++ b/extension/frame_test.go
@@ -0,0 +1,183 @@
+package extension
+
+import (
+	"sync"
+	"testing"
+	"time"
+)
+
+func TestTrackTypeConversion(t *testing.T) {
+	// 验证字符串转TrackType
+	if GetTrackType("video") != TrackVideo {
+		t.Error("video track type conversion failed")
+	}
+	if GetTrackType("invalid") != TrackInvalid {
+		t.Error("invalid track type conversion failed")
+	}
+
+	// 验证TrackType转字符串
+	if TrackVideo.String() != "video" {
+		t.Error("TrackVideo string conversion failed")
+	}
+}
+
+func TestCodecIDConversion(t *testing.T) {
+	// 验证名称转CodecID
+	if GetCodecID("H264") != CodecH264 {
+		t.Error("H264 codec conversion failed")
+	}
+	if GetCodecID("invalid") != CodecInvalid {
+		t.Error("invalid codec conversion failed")
+	}
+
+	// 验证CodecID转名称
+	if CodecH264.String() != "H264" {
+		t.Error("CodecH264 string conversion failed")
+	}
+}
+
+func TestBaseFrame(t *testing.T) {
+	frame := &BaseFrame{
+		Dts:         1000,
+		Pts:         1005,
+		VPrefixSize: 4,
+		Codec:       CodecH264,
+		Track:       TrackVideo,
+	}
+
+	if frame.DTS() != 1000 {
+		t.Error("DTS mismatch")
+	}
+	if frame.PrefixSize() != 4 {
+		t.Error("PrefixSize mismatch")
+	}
+}
+
+func TestFrameCacheAble(t *testing.T) {
+	// 测试原始帧不可缓存
+	raw := &FrameFromBytes{
+		BaseFrame: &BaseFrame{Dts: 1000},
+		DataPtr:   []byte{1, 2, 3},
+	}
+	if raw.CacheAble() {
+		t.Error("raw frame should not be cacheable")
+	}
+
+	// 测试转换后可缓存
+	cached := NewFrameCacheAble(raw, false)
+	if !cached.CacheAble() {
+		t.Error("cached frame should be cacheable")
+	}
+	if cached.Size() != 3 {
+		t.Error("data size mismatch")
+	}
+}
+
+func TestFrameMerger_H264Prefix(t *testing.T) {
+	merger := NewFrameMerger(MergeH264Prefix)
+	var output []byte
+
+	// 创建测试帧（无前缀）
+	frame1 := &FrameFromBytes{BaseFrame: &BaseFrame{Dts: 1000, VPrefixSize: 0}, DataPtr: []byte{0x67}}
+	frame2 := &FrameFromBytes{BaseFrame: &BaseFrame{Dts: 1000, VPrefixSize: 0}, DataPtr: []byte{0x68}}
+
+	// 合并相同时间戳的帧
+	merger.InputFrame(frame1, func(dts, pts uint64, buf []byte, key bool) {
+		output = append(output, buf...)
+	})
+	merger.InputFrame(frame2, func(dts, pts uint64, buf []byte, key bool) {
+		output = append(output, buf...)
+	})
+	merger.Flush(func(dts, pts uint64, buf []byte, key bool) {
+		output = append(output, buf...)
+	})
+
+	// 验证H264前缀添加
+	expected := []byte{0, 0, 0, 1, 0x67, 0, 0, 0, 1, 0x68}
+	if string(output) != string(expected) {
+		t.Error("H264 prefix merge failed")
+	}
+}
+
+func TestFrameMerger_MP4NalSize(t *testing.T) {
+	merger := NewFrameMerger(MergeMP4NalSize)
+	var output []byte
+
+	// 创建测试帧（带4字节前缀）
+	frame := &FrameFromBytes{
+		BaseFrame: &BaseFrame{VPrefixSize: 4, Dts: 1000},
+		DataPtr:   []byte{0, 0, 0, 1, 0x67},
+	}
+
+	merger.InputFrame(frame, func(dts, pts uint64, buf []byte, key bool) {
+		output = buf
+	})
+	merger.Flush(func(dts, pts uint64, buf []byte, key bool) {
+		output = buf
+	})
+
+	// 验证MP4 NALU大小（4字节长度 + 原始数据）
+	if len(output) != 5 {
+		t.Error("MP4 nal size length mismatch")
+	}
+	if output[0] != 0 || output[1] != 0 || output[2] != 0 || output[3] != 1 {
+		t.Error("MP4 nal size header mismatch")
+	}
+}
+
+func TestFrameDispatcher(t *testing.T) {
+	dispatcher := NewFrameDispatcher()
+	statsChan := make(chan struct{})
+
+	// 添加测试代理
+	dispatcher.AddDelegate(&FrameWriter{
+		OnFrame: func(frame Frame) bool {
+			if frame.KeyFrame() && frame.TrackType() == TrackVideo {
+				close(statsChan)
+			}
+			return true
+		},
+	})
+
+	// 输入视频关键帧
+	dispatcher.InputFrame(&FrameFromBytes{
+		BaseFrame: &BaseFrame{
+			Dts:   1000,
+			Track: TrackVideo,
+		},
+		IsKey: true,
+	})
+
+	// 验证GOP统计
+	select {
+	case <-statsChan:
+		frames, keys, gopSize, _ := dispatcher.GetStats()
+		if frames != 1 || keys != 1 || gopSize != 1 {
+			t.Error("GOP statistics mismatch")
+		}
+	case <-time.After(100 * time.Millisecond):
+		t.Error("timeout waiting for stats")
+	}
+}
+
+func TestFrameDispatcher_Concurrent(t *testing.T) {
+	dispatcher := NewFrameDispatcher()
+	var done sync.WaitGroup
+
+	// 并发添加/删除代理
+	for i := 0; i < 10; i++ {
+		done.Add(1)
+		go func(id int) {
+			defer done.Done()
+			writer := &FrameWriter{}
+			dispatcher.AddDelegate(writer)
+			dispatcher.DelDelegate(writer)
+		}(i)
+	}
+	done.Wait()
+
+	// 验证线程安全
+	if dispatcher.Size() != 0 {
+		t.Error("concurrent delegate management failed")
+	}
+}
diff --git a/go.mod b/go.mod
index 411b23e..f827976 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module git.kingecg.top/kingecg/goZLMediaKit
 
-go 1.23.1
+go 1.23