diff --git a/src/MediaFile/MP4Muxer.cpp b/src/MediaFile/MP4Muxer.cpp
index 92b0135c..a8a38ab4 100644
--- a/src/MediaFile/MP4Muxer.cpp
+++ b/src/MediaFile/MP4Muxer.cpp
@@ -135,9 +135,7 @@ void MP4Muxer::onTrackReady(const Track::Ptr &track) {
                 WarnL << "添加AAC Track失败:" << track_id;
                 return;
             }
-            track_info info;
-            info.track_id = track_id;
-            _codec_to_trackid[track->getCodecId()] = info;
+            _codec_to_trackid[track->getCodecId()].track_id = track_id;
         }
             break;
         case CodecH264: {
@@ -170,9 +168,7 @@ void MP4Muxer::onTrackReady(const Track::Ptr &track) {
                 WarnL << "添加H264 Track失败:" << track_id;
                 return;
             }
-            track_info info;
-            info.track_id = track_id;
-            _codec_to_trackid[track->getCodecId()] = info;
+            _codec_to_trackid[track->getCodecId()].track_id = track_id;
         }
             break;
         case CodecH265: {
@@ -205,9 +201,7 @@ void MP4Muxer::onTrackReady(const Track::Ptr &track) {
                 WarnL << "添加H265 Track失败:" << track_id;
                 return;
             }
-            track_info info;
-            info.track_id = track_id;
-            _codec_to_trackid[track->getCodecId()] = info;
+            _codec_to_trackid[track->getCodecId()].track_id = track_id;
         }
             break;
         default:
diff --git a/src/MediaFile/Stamp.cpp b/src/MediaFile/Stamp.cpp
index 02941be2..57045733 100644
--- a/src/MediaFile/Stamp.cpp
+++ b/src/MediaFile/Stamp.cpp
@@ -40,11 +40,11 @@ void Stamp::revise(uint32_t dts, uint32_t pts, int64_t &dts_out, int64_t &pts_ou
         //记录第一次时间戳，后面好计算时间戳增量
         _start_dts = dts;
         _first = false;
-        _ticker = std::make_shared<SmoothTicker>();
+        _ticker.resetTime();
     }
     if (!dts) {
         //没有解码时间戳，我们生成解码时间戳
-        dts = _ticker->elapsedTime();
+        dts = _ticker.elapsedTime();
     }
 
     //相对时间戳
diff --git a/src/MediaFile/Stamp.h b/src/MediaFile/Stamp.h
index 3eed2a1d..4e6241b1 100644
--- a/src/MediaFile/Stamp.h
+++ b/src/MediaFile/Stamp.h
@@ -44,7 +44,7 @@ private:
     int64_t _start_dts = 0;
     int64_t _dts_inc = 0;
     bool _first = true;
-    std::shared_ptr<SmoothTicker> _ticker;
+    SmoothTicker _ticker;
 };
 
 }//namespace mediakit
diff --git a/src/MediaFile/TsMuxer.cpp b/src/MediaFile/TsMuxer.cpp
index 6bd4840e..0aa841cf 100644
--- a/src/MediaFile/TsMuxer.cpp
+++ b/src/MediaFile/TsMuxer.cpp
@@ -42,19 +42,13 @@ TsMuxer::~TsMuxer() {
 void TsMuxer::addTrack(const Track::Ptr &track) {
     switch (track->getCodecId()){
         case CodecH264: {
-            track_info info;
-            info.track_id = mpeg_ts_add_stream(_context, PSI_STREAM_H264, nullptr, 0);
-            _codec_to_trackid[track->getCodecId()] = info;
+            _codec_to_trackid[track->getCodecId()].track_id = mpeg_ts_add_stream(_context, PSI_STREAM_H264, nullptr, 0);
         } break;
         case CodecH265: {
-            track_info info;
-            info.track_id = mpeg_ts_add_stream(_context, PSI_STREAM_H265, nullptr, 0);
-            _codec_to_trackid[track->getCodecId()] = info;
+            _codec_to_trackid[track->getCodecId()].track_id = mpeg_ts_add_stream(_context, PSI_STREAM_H265, nullptr, 0);
         }break;
         case CodecAAC: {
-            track_info info;
-            info.track_id = mpeg_ts_add_stream(_context, PSI_STREAM_AAC, nullptr, 0);
-            _codec_to_trackid[track->getCodecId()] = info;
+            _codec_to_trackid[track->getCodecId()].track_id = mpeg_ts_add_stream(_context, PSI_STREAM_AAC, nullptr, 0);
         }break;
         default:
             break;
diff --git a/src/MediaFile/TsMuxer.h b/src/MediaFile/TsMuxer.h
index 476a56ae..406111dd 100644
--- a/src/MediaFile/TsMuxer.h
+++ b/src/MediaFile/TsMuxer.h
@@ -38,7 +38,7 @@ using namespace toolkit;
 
 namespace mediakit {
 
-class TsMuxer {
+class TsMuxer : public MediaSink {
 public:
     TsMuxer();
     virtual ~TsMuxer();