diff --git a/subscriber.go b/subscriber.go
index 1eac12c..fefa866 100644
--- a/subscriber.go
+++ b/subscriber.go
@@ -21,6 +21,11 @@ const (
 	SUBTYPE_RTP
 	SUBTYPE_FLV
 )
+const (
+	SUBSTATE_INIT = iota
+	SUBSTATE_FIRST
+	SUBSTATE_NORMAL
+)
 
 type AudioFrame AVFrame[AudioSlice]
 type VideoFrame AVFrame[NALUSlice]
@@ -100,6 +105,18 @@ type TrackPlayer struct {
 	FirstAbsTS         uint32 //订阅起始时间戳
 }
 
+func (tp *TrackPlayer) ReadVideo() (vp *AVFrame[NALUSlice]) {
+	vp = tp.Video.ring.Read(tp.Context)
+	tp.Video.Frame = vp
+	return
+}
+
+func (tp *TrackPlayer) ReadAudio() (ap *AVFrame[AudioSlice]) {
+	ap = tp.Audio.ring.Read(tp.Context)
+	tp.Audio.Frame = ap
+	return
+}
+
 // Subscriber 订阅者实体定义
 type Subscriber struct {
 	IO[config.Subscribe]
@@ -180,6 +197,7 @@ func (s *Subscriber) PlayBlock(subType byte) {
 			s.Spesic.OnEvent(AudioDeConf(s.Audio.Track.DecoderConfiguration))
 		}
 		sendVideoFrame = func(frame *AVFrame[NALUSlice]) {
+			// println(frame.Sequence, frame.AbsTime, frame.PTS, frame.DTS, frame.IFrame)
 			spesic.OnEvent((*VideoFrame)(frame))
 		}
 		sendAudioFrame = func(frame *AVFrame[AudioSlice]) {
@@ -196,7 +214,6 @@ func (s *Subscriber) PlayBlock(subType byte) {
 		}
 		var videoSeq, audioSeq uint16
 		sendVideoFrame = func(frame *AVFrame[NALUSlice]) {
-			s.Video.Frame = frame
 			for _, p := range frame.RTP {
 				videoSeq++
 				vp := *p
@@ -206,7 +223,6 @@ func (s *Subscriber) PlayBlock(subType byte) {
 			}
 		}
 		sendAudioFrame = func(frame *AVFrame[AudioSlice]) {
-			s.Audio.Frame = frame
 			for _, p := range frame.RTP {
 				audioSeq++
 				vp := *p
@@ -236,11 +252,10 @@ func (s *Subscriber) PlayBlock(subType byte) {
 			spesic.OnEvent(append(result, util.PutBE(flvHeadCache[11:15], dataSize+11)))
 		}
 		sendVideoFrame = func(frame *AVFrame[NALUSlice]) {
-			s.Video.Frame = frame
+			// println(frame.Sequence, frame.AbsTime, frame.PTS, frame.DTS, frame.IFrame)
 			sendFlvFrame(codec.FLV_TAG_TYPE_VIDEO, frame.AbsTime, frame.AVCC)
 		}
 		sendAudioFrame = func(frame *AVFrame[AudioSlice]) {
-			s.Audio.Frame = frame
 			sendFlvFrame(codec.FLV_TAG_TYPE_AUDIO, frame.AbsTime, frame.AVCC)
 		}
 	}
@@ -249,41 +264,42 @@ func (s *Subscriber) PlayBlock(subType byte) {
 	for ctx.Err() == nil {
 		hasVideo, hasAudio := s.Video.ring != nil && s.Config.SubVideo, s.Audio.ring != nil && s.Config.SubAudio
 		if hasVideo {
-			for {
-				vp := s.Video.ring.Read(ctx)
-				s.Video.Frame = vp
-				if ctx.Err() != nil {
-					return
-				}
-				if vp.IFrame && s.Video.decConfChanged() {
-					sendVideoDecConf()
-				}
+			for ctx.Err() == nil {
+				var vp *AVFrame[NALUSlice]
 				switch vstate {
-				case 0:
+				case SUBSTATE_INIT:
+					s.Video.ring.Ring = s.Video.Track.IDRing
+					vp = s.ReadVideo()
 					startTime = time.Now()
 					s.FirstAbsTS = vp.AbsTime
 					firstSeq = vp.Sequence
-					s.Debug("firstIFrame", zap.Uint32("seq", vp.Sequence))
+					s.Info("firstIFrame", zap.Uint32("seq", vp.Sequence))
 					if s.Config.LiveMode {
-						vstate = 1
+						vstate = SUBSTATE_FIRST
 					} else {
-						vstate = 3
-					}
-				case 1:
-					// 防止过快消费
-					if fast := time.Duration(vp.AbsTime-s.FirstAbsTS)*time.Millisecond - time.Since(startTime); fast > 0 && fast < time.Second {
-						time.Sleep(fast)
+						vstate = SUBSTATE_NORMAL
 					}
+				case SUBSTATE_FIRST:
 					if s.Video.Track.IDRing.Value.Sequence != firstSeq {
 						s.Video.ring.Ring = s.Video.Track.IDRing // 直接跳到最近的关键帧
-						vstate = 2
+						vp = s.ReadVideo()
+						s.SkipTS = vp.AbsTime - beforeJump
+						s.Debug("skip to latest key frame", zap.Uint32("seq", vp.Sequence), zap.Uint32("skipTS", s.SkipTS))
+						vstate = SUBSTATE_NORMAL
+					} else {
+						vp = s.ReadVideo()
 						beforeJump = vp.AbsTime
-						continue
+						// 防止过快消费
+						if fast := time.Duration(vp.AbsTime-s.FirstAbsTS)*time.Millisecond - time.Since(startTime); fast > 0 && fast < time.Second {
+							time.Sleep(fast)
+						}
 					}
-				case 2:
-					vstate = 3
-					s.SkipTS = vp.AbsTime - beforeJump
-					s.Debug("skip to latest key frame", zap.Uint32("seq", vp.Sequence), zap.Uint32("skipTS", s.SkipTS))
+				case SUBSTATE_NORMAL:
+					vp = s.ReadVideo()
+				}
+				if vp.IFrame && s.Video.decConfChanged() {
+					// println(s.Video.confSeq, s.Video.Track.SPSInfo.Width, s.Video.Track.SPSInfo.Height)
+					sendVideoDecConf()
 				}
 				if !s.Config.IFrameOnly || vp.IFrame {
 					sendVideoFrame(vp)
@@ -294,7 +310,7 @@ func (s *Subscriber) PlayBlock(subType byte) {
 					break
 				}
 			}
-			if vstate < 3 {
+			if vstate < SUBSTATE_NORMAL {
 				continue
 			}
 		}
@@ -307,8 +323,7 @@ func (s *Subscriber) PlayBlock(subType byte) {
 				audioSent = true
 			}
 			for {
-				ap := s.Audio.ring.Read(ctx)
-				s.Audio.Frame = ap
+				ap := s.ReadAudio()
 				if ctx.Err() != nil {
 					return
 				}
diff --git a/track/video.go b/track/video.go
index d7b6fa1..96ee363 100644
--- a/track/video.go
+++ b/track/video.go
@@ -3,7 +3,7 @@ package track
 import (
 	"bytes"
 
-	. "github.com/logrusorgru/aurora"
+	// . "github.com/logrusorgru/aurora"
 	"go.uber.org/zap"
 	"m7s.live/engine/v4/codec"
 	. "m7s.live/engine/v4/common"
@@ -65,7 +65,7 @@ func (vt *Video) ComputeGOP() {
 		vt.GOP = int(vt.AVRing.RingBuffer.Value.Sequence - vt.IDRing.Value.Sequence)
 		if l := vt.AVRing.RingBuffer.Size - vt.GOP - 5; l > 5 {
 			vt.AVRing.RingBuffer.Size -= l
-			vt.Stream.Debug(Sprintf("resize(%d%s%d)", vt.AVRing.RingBuffer.Size+l, Blink("→"), vt.AVRing.RingBuffer.Size), zap.String("name", vt.Name))
+			vt.Stream.Debug("resize", zap.Int("before", vt.AVRing.RingBuffer.Size+l), zap.Int("after", vt.AVRing.RingBuffer.Size), zap.String("name", vt.Name))
 			//缩小缓冲环节省内存
 			vt.Unlink(l).Do(func(v AVFrame[NALUSlice]) {
 				if v.IFrame {