1、当发布者离线时没有订阅者时，流的超时时间从1s改为10ms。

2、Track增加离线状态，当发布者离线时，Track状态改为离线状态，当发布者重新上线时，Track状态改为在线状态。
3、Track在恢复在线后，记录时间戳的差值，保持后续时间戳和之前的连续。
4、进一步优化订阅者读取音视频同步逻辑。

common/index.go

@@ -5,6 +5,8 @@ import (
 	"time"
 
 	"github.com/pion/rtp"
+	"go.uber.org/zap"
+	"m7s.live/engine/v4/log"
 	"m7s.live/engine/v4/util"
 )
 
@@ -12,19 +14,27 @@ type TimelineData[T any] struct {
 	Timestamp time.Time
 	Value     T
 }
+type TrackState byte
+
+const (
+	TrackStateOnline  TrackState = iota // 上线
+	TrackStateOffline                   // 下线
+)
 
 // Base 基础Track类
 type Base struct {
 	Name     string
+	log.Zap  `json:"-"`
 	Stream   IStream     `json:"-"`
 	Attached atomic.Bool `json:"-"`
+	State    TrackState
 	ts       time.Time
 	bytes    int
 	frames   int
 	BPS      int
 	FPS      int
-	RawPart  []int               // 裸数据片段用于UI上显示
 	RawSize  int                 // 裸数据长度
+	RawPart  []int               // 裸数据片段用于UI上显示
 	BPSs     []TimelineData[int] // 10s码率统计
 	FPSs     []TimelineData[int] // 10s帧率统计
 }
@@ -39,7 +49,7 @@ func (bt *Base) ComputeBPS(bytes int) {
 		bt.frames = 0
 		bt.ts = time.Now()
 		bt.BPSs = append(bt.BPSs, TimelineData[int]{Timestamp: bt.ts, Value: bt.BPS})
-		if len(bt.BPSs) > 10 {
+		if len(bt.BPSs) > 9 {
 			copy(bt.BPSs, bt.BPSs[1:])
 			bt.BPSs = bt.BPSs[:10]
 		}
@@ -61,6 +71,17 @@ func (bt *Base) Flush(bf *BaseFrame) {
 	bf.Timestamp = time.Now()
 }
 func (bt *Base) SetStuff(stuff ...any) {
+	for _, s := range stuff {
+		switch v := s.(type) {
+		case IStream:
+			bt.Stream = v
+			bt.Zap = v.With(zap.String("track", bt.Name))
+		case TrackState:
+			bt.State = v
+		case string:
+			bt.Name = v
+		}
+	}
 }
 
 type Track interface {

stream.go

@@ -161,8 +161,16 @@ type Tracks struct {
 }
 
 func (tracks *Tracks) Add(name string, t Track) bool {
-	if v, ok := t.(*track.Video); ok && tracks.MainVideo == nil {
+	switch v := t.(type) {
-		tracks.MainVideo = v
+	case *track.Video:
+		if tracks.MainVideo == nil {
+			tracks.MainVideo = v
+			tracks.SetIDR(v)
+		}
+	case *track.Audio:
+		if tracks.MainVideo != nil {
+			v.Narrow()
+		}
 	}
 	return tracks.Map.Add(name, t)
 }
@@ -281,16 +289,18 @@ func (r *Stream) action(action StreamAction) (ok bool) {
 			waitTime := time.Duration(0)
 			if r.Publisher != nil {
 				waitTime = r.Publisher.GetPublisher().Config.WaitCloseTimeout
+				r.Tracks.Range(func(name string, t Track) {
+					t.SetStuff(TrackStateOffline)
+				})
 			}
 			r.Subscribers.OnPublisherLost(event)
-			suber := r.Subscribers.Pick()
+			if suber := r.Subscribers.Pick(); suber != nil {
-			if suber != nil {
 				r.Subscribers.Broadcast(stateEvent)
 				if waitTime == 0 {
 					waitTime = suber.GetSubscriber().Config.WaitTimeout
 				}
 			} else if waitTime == 0 {
-				waitTime = time.Second //没有订阅者也没有配置发布者等待重连时间，默认1秒后关闭流
+				waitTime = time.Millisecond * 10 //没有订阅者也没有配置发布者等待重连时间，默认10ms后关闭流
 			}
 			r.timeout.Reset(waitTime)
 		case STATE_PUBLISHING:

subscriber.go

@@ -5,7 +5,6 @@ import (
 	"io"
 	"net"
 	"strconv"
-	"time"
 
 	"go.uber.org/zap"
 	"m7s.live/engine/v4/codec"
@@ -168,25 +167,26 @@ func (s *Subscriber) PlayBlock(subType byte) {
 		return
 	}
 	s.Info("playblock")
-	var lastPlayAbsTime uint32 //最新的音频或者视频的时间戳，用于音视频同步
 	s.TrackPlayer.Context, s.TrackPlayer.CancelFunc = context.WithCancel(s.IO)
 	ctx := s.TrackPlayer.Context
 	sendVideoDecConf := func() {
+		s.Debug("sendVideoDecConf")
 		spesic.OnEvent(s.Video.ParamaterSets)
 		spesic.OnEvent(VideoDeConf(s.VideoReader.Track.SequenceHead))
 	}
 	sendAudioDecConf := func() {
+		s.Debug("sendAudioDecConf")
 		spesic.OnEvent(AudioDeConf(s.AudioReader.Track.SequenceHead))
 	}
 	var sendAudioFrame, sendVideoFrame func(*AVFrame)
 	switch subType {
 	case SUBTYPE_RAW:
 		sendVideoFrame = func(frame *AVFrame) {
-			// println("v", frame.Sequence, s.VideoReader.AbsTime, frame.IFrame)
+			// println("v", frame.Sequence, frame.AbsTime, s.VideoReader.AbsTime, frame.IFrame)
 			spesic.OnEvent(VideoFrame{frame, s.VideoReader.AbsTime, frame.PTS - s.VideoReader.SkipTs*90, frame.DTS - s.VideoReader.SkipTs*90})
 		}
 		sendAudioFrame = func(frame *AVFrame) {
-			// println("a", frame.Sequence, s.AudioReader.AbsTime)
+			// println("a", frame.Sequence, frame.AbsTime, s.AudioReader.AbsTime)
 			spesic.OnEvent(AudioFrame{frame, s.AudioReader.AbsTime, s.AudioReader.AbsTime * 90, s.AudioReader.AbsTime * 90})
 		}
 	case SUBTYPE_RTP:
@@ -254,54 +254,46 @@ func (s *Subscriber) PlayBlock(subType byte) {
 		subMode, _ = strconv.Atoi(s.Args.Get(s.Config.SubModeArgName))
 	}
 	var videoFrame, audioFrame *AVFrame
+	var lastAbsTime uint32
+	hasVideo, hasAudio := s.VideoReader.Track != nil && s.Config.SubVideo, s.AudioReader.Track != nil && s.Config.SubAudio
+	if !hasAudio && !hasVideo {
+		s.Error("play neither video nor audio")
+		return
+	}
 	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 {
-				if videoFrame.CanRead {
-					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 || ctx.Err() != nil {
 					return
 				}
+				if frame.IFrame && s.VideoReader.DecConfChanged() {
+					s.VideoReader.ConfSeq = s.VideoReader.Track.SequenceHeadSeq
+					sendVideoDecConf()
+				}
 				if audioFrame != nil {
-					if frame.AbsTime > audioFrame.AbsTime {
+					if frame.AbsTime > lastAbsTime {
 						if audioFrame.CanRead {
 							sendAudioFrame(audioFrame)
 						}
-						audioFrame = nil
+						videoFrame = frame
+						lastAbsTime = frame.AbsTime
+						break
 					}
-				}
+				} else if lastAbsTime == 0 {
-				if frame.IFrame && s.VideoReader.DecConfChanged() {
+					if lastAbsTime = frame.AbsTime; lastAbsTime != 0 {
-					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 {
-					if frame.AbsTime > lastPlayAbsTime {
-						lastPlayAbsTime = frame.AbsTime
 						videoFrame = frame
 						break
-					} else {
-						sendVideoFrame(frame)
 					}
 				}
+				if !s.Config.IFrameOnly || frame.IFrame {
+					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 {
-				if audioFrame.CanRead {
-					sendAudioFrame(audioFrame)
-				}
-				audioFrame = nil
-			}
 			for ctx.Err() == nil {
 				switch s.AudioReader.State {
 				case track.READSTATE_INIT:
@@ -319,30 +311,25 @@ func (s *Subscriber) PlayBlock(subType byte) {
 				if frame == nil || ctx.Err() != nil {
 					return
 				}
-				if videoFrame != nil {
-					if frame.AbsTime > videoFrame.AbsTime {
-						if videoFrame.CanRead {
-							sendVideoFrame(videoFrame)
-						}
-						videoFrame = nil
-					}
-				}
 				if s.AudioReader.DecConfChanged() {
 					s.AudioReader.ConfSeq = s.AudioReader.Track.SequenceHeadSeq
 					sendAudioDecConf()
 				}
-				if frame.AbsTime > lastPlayAbsTime {
+				if videoFrame != nil {
-					lastPlayAbsTime = frame.AbsTime
+					if frame.AbsTime > lastAbsTime {
-					audioFrame = frame
+						if videoFrame.CanRead {
-					break
+							sendVideoFrame(videoFrame)
-				} else {
+						}
+						audioFrame = frame
+						lastAbsTime = frame.AbsTime
+						break
+					}
+				}
+				if frame.AbsTime >= s.AudioReader.SkipTs {
 					sendAudioFrame(frame)
 				}
 			}
 		}
-		if !hasVideo && !hasAudio {
-			time.Sleep(time.Second)
-		}
 	}
 }
 

track/aac.go

@@ -58,7 +58,7 @@ func (aac *AAC) WriteRTPFrame(frame *RTPFrame) {
 		if aac.lack > 0 {
 			rawLen := aac.Value.AUList.ByteLength
 			if rawLen == 0 {
-				aac.Stream.Error("lack >0 but rawlen=0")
+				aac.Error("lack >0 but rawlen=0")
 			}
 			last := aac.Value.AUList.Pre
 			auLen := len(frame.Payload) - startOffset
@@ -67,7 +67,7 @@ func (aac *AAC) WriteRTPFrame(frame *RTPFrame) {
 				aac.lack -= auLen
 				return
 			} else if aac.lack < auLen {
-				aac.Stream.Warn("lack < auLen", zap.Int("lack", aac.lack), zap.Int("auLen", auLen))
+				aac.Warn("lack < auLen", zap.Int("lack", aac.lack), zap.Int("auLen", auLen))
 			}
 			last.Value.Push(aac.BytesPool.GetShell(frame.Payload[startOffset : startOffset+aac.lack]))
 			aac.lack = 0
@@ -99,7 +99,7 @@ func (aac *AAC) WriteSequenceHead(sh []byte) {
 
 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))
+		aac.Error("AVCC data too short", zap.Int("len", l))
 		return io.ErrShortWrite
 	}
 	if frame.GetByte(1) == 0 {

track/base.go

@@ -84,6 +84,7 @@ type Media struct {
 	RTPMuxer
 	RTPDemuxer
 	SpesificTrack `json:"-"`
+	deltaTs       int64 //用于接续发布后时间戳连续
 	流速控制
 }
 
@@ -106,10 +107,9 @@ func (av *Media) SetSpeedLimit(value time.Duration) {
 }
 
 func (av *Media) SetStuff(stuff ...any) {
+	// 代表发布者已经离线，该Track成为遗留Track，等待下一任发布者接续发布
 	for _, s := range stuff {
 		switch v := s.(type) {
-		case string:
-			av.Name = v
 		case int:
 			av.Init(v)
 			av.SSRC = uint32(uintptr(unsafe.Pointer(av)))
@@ -118,12 +118,12 @@ func (av *Media) SetStuff(stuff ...any) {
 			av.SampleRate = v
 		case byte:
 			av.PayloadType = v
-		case IStream:
-			av.Stream = v
 		case util.BytesPool:
 			av.BytesPool = v
 		case SpesificTrack:
 			av.SpesificTrack = v
+		default:
+			av.Base.SetStuff(v)
 		}
 	}
 }
@@ -189,6 +189,16 @@ func (av *Media) AddIDR() {
 
 func (av *Media) Flush() {
 	curValue, preValue, nextValue := &av.Value, av.LastValue, av.Next()
+	if av.State == TrackStateOffline {
+		av.State = TrackStateOnline
+		av.deltaTs = int64(preValue.AbsTime) - int64(curValue.AbsTime) + int64(preValue.DeltaTime)
+		av.Info("track back online")
+	}
+	if av.deltaTs != 0 {
+		curValue.DTS = uint32(int64(curValue.DTS) + av.deltaTs*90)
+		curValue.PTS = uint32(int64(curValue.PTS) + av.deltaTs*90)
+		curValue.AbsTime = 0
+	}
 	bufferTime := av.Stream.GetPublisherConfig().BufferTime
 	if bufferTime > 0 && av.IDRingList.Length > 1 && time.Duration(curValue.AbsTime-av.IDRingList.Next.Next.Value.Value.AbsTime)*time.Millisecond > bufferTime {
 		av.ShiftIDR()

track/g711.go

@@ -39,7 +39,7 @@ type G711 struct {
 
 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))
+		g711.Error("AVCC data too short", zap.Int("len", l))
 		return io.ErrShortWrite
 	}
 	g711.Value.AUList.Push(g711.BytesPool.GetShell(frame.Next.Value[1:]))

track/h264.go

@@ -68,13 +68,13 @@ func (vt *H264) WriteSliceBytes(slice []byte) {
 	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)))
+		vt.Error("WriteSliceBytes naluType not support", zap.Int("naluType", int(naluType)))
 	}
 }
 
 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))
+		vt.Error("AVCC data too short", zap.Int("len", l))
 		return io.ErrShortWrite
 	}
 	if frame.GetByte(1) == 0 {
@@ -110,7 +110,7 @@ func (vt *H264) WriteRTPFrame(frame *RTPFrame) {
 				if buffer.Len() >= nextSize {
 					vt.WriteSliceBytes(buffer.ReadN(nextSize))
 				} else {
-					vt.Stream.Error("invalid nalu size", zap.Int("naluType", int(naluType)))
+					vt.Error("invalid nalu size", zap.Int("naluType", int(naluType)))
 					return
 				}
 			}

track/h265.go

@@ -58,13 +58,13 @@ func (vt *H265) WriteSliceBytes(slice []byte) {
 	case codec.NAL_UNIT_SEI:
 		vt.AppendAuBytes(slice)
 	default:
-		vt.Video.Stream.Warn("h265 slice type not supported", zap.Uint("type", uint(t)))
+		vt.Warn("h265 slice type not supported", zap.Uint("type", uint(t)))
 	}
 }
 
 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))
+		vt.Error("AVCC data too short", zap.Int("len", l))
 		return io.ErrShortWrite
 	}
 	if frame.GetByte(1) == 0 {
@@ -74,7 +74,7 @@ func (vt *H265) WriteAVCC(ts uint32, frame util.BLL) (err error) {
 			vt.SPSInfo, _ = codec.ParseHevcSPS(vt.SequenceHead)
 			vt.nalulenSize = (int(vt.SequenceHead[26]) & 0x03) + 1
 		} else {
-			vt.Stream.Error("H265 ParseVpsSpsPps Error")
+			vt.Error("H265 ParseVpsSpsPps Error")
 			vt.Stream.Close()
 		}
 		return

track/reader-av.go

@@ -5,6 +5,7 @@ import (
 	"runtime"
 	"time"
 
+	"go.uber.org/zap"
 	"m7s.live/engine/v4/common"
 	"m7s.live/engine/v4/util"
 )
@@ -64,9 +65,12 @@ func (r *AVRingReader) Read(ctx context.Context, mode int) (err error) {
 	r.ctx = ctx
 	switch r.State {
 	case READSTATE_INIT:
+		r.Track.Info("start read", zap.Int("mode", mode))
 		startRing := r.Track.Ring
 		if r.Track.IDRing != nil {
 			startRing = r.Track.IDRing
+		} else {
+			r.Track.Warn("no IDRring")
 		}
 		switch mode {
 		case 0:
@@ -94,6 +98,7 @@ func (r *AVRingReader) Read(ctx context.Context, mode int) (err error) {
 		}
 		r.SkipTs = r.FirstTs
 		r.FirstSeq = r.Frame.Sequence
+		r.Track.Info("first frame read", zap.Uint32("firstTs", r.FirstTs), zap.Uint32("firstSeq", r.FirstSeq))
 	case READSTATE_FIRST:
 		if r.Track.IDRing.Value.Sequence != r.FirstSeq {
 			r.Ring = r.Track.IDRing
@@ -102,6 +107,7 @@ func (r *AVRingReader) Read(ctx context.Context, mode int) (err error) {
 				return
 			}
 			r.SkipTs = frame.AbsTime - r.beforeJump
+			r.Track.Info("jump", zap.Uint32("skipSeq", r.Track.IDRing.Value.Sequence-r.FirstSeq), zap.Uint32("skipTs", r.SkipTs))
 			r.State = READSTATE_NORMAL
 		} else {
 			r.MoveNext()
@@ -117,5 +123,6 @@ func (r *AVRingReader) Read(ctx context.Context, mode int) (err error) {
 		r.ReadFrame()
 	}
 	r.AbsTime = r.Frame.AbsTime - r.SkipTs
+	// println(r.Track.Name, r.State, r.Frame.AbsTime, r.SkipTs, r.AbsTime)
 	return
 }

track/rtp.go

@@ -12,7 +12,7 @@ const RTPMTU = 1400
 
 func (av *Media) UnmarshalRTPPacket(p *rtp.Packet) (frame *RTPFrame) {
 	if av.PayloadType != p.PayloadType {
-		av.Stream.Warn("RTP PayloadType error", zap.Uint8("want", av.PayloadType), zap.Uint8("got", p.PayloadType))
+		av.Warn("RTP PayloadType error", zap.Uint8("want", av.PayloadType), zap.Uint8("got", p.PayloadType))
 		return
 	}
 	frame = &RTPFrame{
@@ -26,7 +26,7 @@ func (av *Media) UnmarshalRTP(raw []byte) (frame *RTPFrame) {
 	var p rtp.Packet
 	err := p.Unmarshal(raw)
 	if err != nil {
-		av.Stream.Warn("RTP Unmarshal error", zap.Error(err))
+		av.Warn("RTP Unmarshal error", zap.Error(err))
 		return
 	}
 	return av.UnmarshalRTPPacket(&p)

util/pool.go

@@ -282,9 +282,10 @@ func (p BytesPool) Get(size int) (item *ListItem[Buffer]) {
 type Pool[T any] List[T]
 
 func (p *Pool[T]) Get() (item *ListItem[T]) {
-	item = (*List[T])(p).PoolShift()
+	if item = (*List[T])(p).PoolShift(); item == nil {
-	if item == nil {
+		item = &ListItem[T]{
-		item = &ListItem[T]{}
+			Pool: (*List[T])(p),
+		}
 	}
 	return
 }