diff --git a/pkg/hls/muxer.go b/pkg/hls/muxer.go
index 85102cc..545ed7a 100644
--- a/pkg/hls/muxer.go
+++ b/pkg/hls/muxer.go
@@ -152,7 +152,7 @@ func (m *Muxer) FeedMpegts(tsPackets []byte, frame *mpegts.Frame, boundary bool)
 	//Log.Debugf("> FeedMpegts. boundary=%v, frame=%p, sid=%d", boundary, frame, frame.Sid)
 	if frame.Sid == mpegts.StreamIdAudio {
 		// TODO(chef): 为什么音频用pts，视频用dts
-		if err := m.updateFragment(frame.Pts, boundary); err != nil {
+		if err := m.updateFragment(frame.Pts, boundary, frame); err != nil {
 			Log.Errorf("[%s] update fragment error. err=%+v", m.UniqueKey, err)
 			return
 		}
@@ -162,7 +162,7 @@ func (m *Muxer) FeedMpegts(tsPackets []byte, frame *mpegts.Frame, boundary bool)
 		}
 		//Log.Debugf("[%s] WriteFrame A. dts=%d, len=%d", m.UniqueKey, frame.DTS, len(frame.Raw))
 	} else {
-		if err := m.updateFragment(frame.Dts, boundary); err != nil {
+		if err := m.updateFragment(frame.Dts, boundary, frame); err != nil {
 			Log.Errorf("[%s] update fragment error. err=%+v", m.UniqueKey, err)
 			return
 		}
@@ -192,8 +192,10 @@ func (m *Muxer) OutPath() string {
 //
 // @param boundary: 调用方认为可能是开启新TS切片的时间点
 //
+// @param frame: 内部只在打日志时使用
+//
 // @return: 理论上，只有文件操作失败才会返回错误
-func (m *Muxer) updateFragment(ts uint64, boundary bool) error {
+func (m *Muxer) updateFragment(ts uint64, boundary bool, frame *mpegts.Frame) error {
 	discont := true
 
 	// 如果已经有TS切片，检查是否需要强制开启新的切片，以及切片是否发生跳跃
@@ -210,7 +212,7 @@ func (m *Muxer) updateFragment(ts uint64, boundary bool) error {
 		//
 		maxfraglen := uint64(m.config.FragmentDurationMs * 90 * 10)
 		if (ts > m.fragTs && ts-m.fragTs > maxfraglen) || (m.fragTs > ts && m.fragTs-ts > negMaxfraglen) {
-			Log.Warnf("[%s] force fragment split. fragTs=%d, ts=%d", m.UniqueKey, m.fragTs, ts)
+			Log.Warnf("[%s] force fragment split. fragTs=%d, ts=%d, frame=%s", m.UniqueKey, m.fragTs, ts, frame.DebugString())
 
 			if err := m.closeFragment(false); err != nil {
 				return err
diff --git a/pkg/remux/rtmp2mpegts.go b/pkg/remux/rtmp2mpegts.go
index e5a3262..5c8637c 100644
--- a/pkg/remux/rtmp2mpegts.go
+++ b/pkg/remux/rtmp2mpegts.go
@@ -480,8 +480,8 @@ func (s *Rtmp2MpegtsRemuxer) adjustDtsPts(frame *mpegts.Frame) {
 		if s.basicAudioPts == math.MaxUint64 {
 			s.basicAudioPts = frame.Pts
 		}
-		frame.Dts = subSafe(frame.Dts, s.basicAudioDts)
-		frame.Pts = subSafe(frame.Pts, s.basicAudioPts)
+		frame.Dts = subSafe(frame.Dts, s.basicAudioDts, s.UniqueKey, frame)
+		frame.Pts = subSafe(frame.Pts, s.basicAudioPts, s.UniqueKey, frame)
 	} else if frame.Sid == mpegts.StreamIdVideo {
 		if s.basicVideoDts == math.MaxUint64 {
 			s.basicVideoDts = frame.Dts
@@ -489,15 +489,15 @@ func (s *Rtmp2MpegtsRemuxer) adjustDtsPts(frame *mpegts.Frame) {
 		if s.basicVideoPts == math.MaxUint64 {
 			s.basicVideoPts = frame.Pts
 		}
-		frame.Dts = subSafe(frame.Dts, s.basicVideoDts)
-		frame.Pts = subSafe(frame.Pts, s.basicVideoPts)
+		frame.Dts = subSafe(frame.Dts, s.basicVideoDts, s.UniqueKey, frame)
+		frame.Pts = subSafe(frame.Pts, s.basicVideoPts, s.UniqueKey, frame)
 	}
 }
 
-func subSafe(a, b uint64) uint64 {
+func subSafe(a, b uint64, uk string, frame *mpegts.Frame) uint64 {
 	if a >= b {
 		return a - b
 	}
-	Log.Warnf("subSafe. a=%d, b=%d", a, b)
-	return 0
+	Log.Warnf("[%s] subSafe. a=%d, b=%d, frame=%s", uk, a, b, frame.DebugString())
+	return a
 }