diff --git a/src/Common/MediaSink.cpp b/src/Common/MediaSink.cpp
index 95aa4681..b9d3be98 100644
--- a/src/Common/MediaSink.cpp
+++ b/src/Common/MediaSink.cpp
@@ -29,7 +29,7 @@
 namespace mediakit{
 
 void MediaSink::addTrack(const Track::Ptr &track_in) {
-    lock_guard<mutex> lck(_mtx);
+    lock_guard<recursive_mutex> lck(_mtx);
 //克隆Track，只拷贝其数据，不拷贝其数据转发关系
     auto track = track_in->clone();
 
@@ -57,7 +57,7 @@ void MediaSink::addTrack(const Track::Ptr &track_in) {
 }
 
 void MediaSink::inputFrame(const Frame::Ptr &frame) {
-    lock_guard<mutex> lck(_mtx);
+    lock_guard<recursive_mutex> lck(_mtx);
     auto codec_id = frame->getCodecId();
     auto it = _track_map.find(codec_id);
     if (it == _track_map.end()) {
@@ -84,7 +84,7 @@ bool MediaSink::isAllTrackReady() const {
 }
 
 Track::Ptr MediaSink::getTrack(TrackType type) const {
-    lock_guard<mutex> lck(_mtx);
+    lock_guard<recursive_mutex> lck(_mtx);
     for (auto &pr : _track_map){
         if(pr.second->getTrackType() == type){
             return pr.second;
diff --git a/src/Common/MediaSink.h b/src/Common/MediaSink.h
index 5cc0d056..a57dac2b 100644
--- a/src/Common/MediaSink.h
+++ b/src/Common/MediaSink.h
@@ -93,7 +93,7 @@ protected:
      */
     virtual void onTrackFrame(const Frame::Ptr &frame) {};
 private:
-    mutable mutex _mtx;
+    mutable recursive_mutex _mtx;
     map<int,Track::Ptr> _track_map;
     map<int,function<void()> > _trackReadyCallback;
     bool _allTrackReady = false;
diff --git a/src/MediaFile/Mp4Maker.cpp b/src/MediaFile/Mp4Maker.cpp
index 34396be2..9e579b4f 100644
--- a/src/MediaFile/Mp4Maker.cpp
+++ b/src/MediaFile/Mp4Maker.cpp
@@ -113,7 +113,7 @@ void Mp4Maker::inputAAC(void *pData, uint32_t ui32Length, uint32_t ui32TimeStamp
 void Mp4Maker::inputH264_l(void *pData, uint32_t ui32Length, uint32_t ui32Duration) {
     GET_CONFIG_AND_REGISTER(uint32_t,recordSec,Record::kFileSecond);
 
-	auto iType = ((uint8_t*)pData)[0] & 0x1F;
+	auto iType = ((uint8_t*)pData)[4] & 0x1F;
 	if(iType == 5 && (_hMp4 == MP4_INVALID_FILE_HANDLE || _ticker.elapsedTime() > recordSec * 1000)){
 		//在I帧率处新建MP4文件
 		//如果文件未创建或者文件超过10分钟则创建新文件
diff --git a/src/Player/Track.h b/src/Player/Track.h
index 81fea5c9..7ecb2058 100644
--- a/src/Player/Track.h
+++ b/src/Player/Track.h
@@ -238,28 +238,32 @@ public:
             case 5:{
                 //I
                 if(!_sps.empty()){
-                    if(!_spsFrame){
+                    if(!_spsFrame)
+                    {
                         H264Frame::Ptr insertFrame = std::make_shared<H264Frame>();
-                        insertFrame->timeStamp = frame->stamp();
                         insertFrame->type = 7;
-                        insertFrame->buffer.assign("\x0\x0\x0\x1");
+                        insertFrame->timeStamp = frame->stamp();
+                        insertFrame->buffer.assign("\x0\x0\x0\x1",4);
                         insertFrame->buffer.append(_sps);
                         insertFrame->iPrefixSize = 4;
                         _spsFrame = insertFrame;
                     }
+                    _spsFrame->timeStamp = frame->stamp();
                     VideoTrack::inputFrame(_spsFrame);
                 }
 
                 if(!_pps.empty()){
-                    if(!_ppsFrame){
+                    if(!_ppsFrame)
+                    {
                         H264Frame::Ptr insertFrame = std::make_shared<H264Frame>();
-                        insertFrame->timeStamp = frame->stamp();
                         insertFrame->type = 8;
-                        insertFrame->buffer.assign("\x0\x0\x0\x1");
+                        insertFrame->timeStamp = frame->stamp();
+                        insertFrame->buffer.assign("\x0\x0\x0\x1",4);
                         insertFrame->buffer.append(_pps);
                         insertFrame->iPrefixSize = 4;
                         _ppsFrame = insertFrame;
                     }
+                    _ppsFrame->timeStamp = frame->stamp();
                     VideoTrack::inputFrame(_ppsFrame);
                 }
                 VideoTrack::inputFrame(frame);