由于在RtspSession类确保了函数执行顺序，所以回滚多余代码也能确保单track流迅速注册

src/Rtsp/RtspMediaSourceImp.h

@@ -89,9 +89,6 @@ public:
             _muxer->addTrack(track);
             track->addDelegate(_muxer);
         }
-        if (_all_demuxer_track_ready) {
-            this->addTrackCompleted();
-        }
     }
 
     /**
@@ -111,7 +108,6 @@ public:
         if (_muxer) {
             _muxer->addTrackCompleted();
         }
-        _all_demuxer_track_ready = true;
     }
 
     void resetTracks() override {
@@ -145,7 +141,6 @@ private:
     RtspDemuxer::Ptr _demuxer;
     MultiMediaSourceMuxer::Ptr _muxer;
     bool _all_track_ready = false;
-    bool _all_demuxer_track_ready = false;
 };
 } /* namespace mediakit */