diff --git a/src/Record/MP4Recorder.cpp b/src/Record/MP4Recorder.cpp
index 4784fcda..ade1d519 100644
--- a/src/Record/MP4Recorder.cpp
+++ b/src/Record/MP4Recorder.cpp
@@ -54,6 +54,7 @@ void MP4Recorder::createFile() {
 
     try {
         _muxer = std::make_shared<MP4Muxer>();
+        TraceL << "Open tmp mp4 file: " << full_path_tmp;
         _muxer->openMP4(full_path_tmp);
         for (auto &track :_tracks) {
             //添加track
@@ -71,10 +72,13 @@ void MP4Recorder::asyncClose() {
     auto full_path_tmp = _full_path_tmp;
     auto full_path = _full_path;
     auto info = _info;
+    TraceL << "Start close tmp mp4 file: " << full_path_tmp;
     WorkThreadPool::Instance().getExecutor()->async([muxer, full_path_tmp, full_path, info]() mutable {
         info.time_len = muxer->getDuration() / 1000.0f;
         // 关闭mp4可能非常耗时，所以要放在后台线程执行
+        TraceL << "Closing tmp mp4 file: " << full_path_tmp;
         muxer->closeMP4();
+        TraceL << "Closed tmp mp4 file: " << full_path_tmp;
         if (!full_path_tmp.empty()) {
             // 获取文件大小
             info.file_size = File::fileSize(full_path_tmp.data());
@@ -86,6 +90,7 @@ void MP4Recorder::asyncClose() {
             // 临时文件名改成正式文件名，防止mp4未完成时被访问
             rename(full_path_tmp.data(), full_path.data());
         }
+        TraceL << "Emit mp4 record event: " << full_path;
         //触发mp4录制切片生成事件
         NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastRecordMP4, info);
     });