diff --git a/src/Common/MultiMediaSourceMuxer.h b/src/Common/MultiMediaSourceMuxer.h
index 713fd214..147471f4 100644
--- a/src/Common/MultiMediaSourceMuxer.h
+++ b/src/Common/MultiMediaSourceMuxer.h
@@ -49,8 +49,9 @@ public:
      * @param track 媒体描述
      */
     void addTrack(const Track::Ptr & track) {
-        _rtmp->addTrack(track);
-        _rtsp->addTrack(track);
+        //克隆track的目的是防止inputFrame时由于用的同一个track而导致写入两次数据
+        _rtmp->addTrack(track->clone());
+        _rtsp->addTrack(track->clone());
     }
 
     /**
@@ -58,6 +59,7 @@ public:
      * @param frame 帧数据
      */
     void inputFrame(const Frame::Ptr &frame) override {
+        //_rtmp和_rtsp对象不能使用相同的Track，否则会触发两次inputFrame操作
         _rtmp->inputFrame(frame);
         _rtsp->inputFrame(frame);
     }
diff --git a/src/RtmpMuxer/RtmpCodec.h b/src/RtmpMuxer/RtmpCodec.h
index f1f8620c..45e919fe 100644
--- a/src/RtmpMuxer/RtmpCodec.h
+++ b/src/RtmpMuxer/RtmpCodec.h
@@ -68,7 +68,6 @@ public:
     typedef std::shared_ptr<RtmpRing> Ptr;
 
     RtmpRing(){
-        _rtmpRing = std::make_shared<RingType>();
     }
     virtual ~RtmpRing(){}
 
@@ -81,7 +80,9 @@ public:
     }
 
     bool inputRtmp(const RtmpPacket::Ptr &rtmp, bool key_pos) override{
-        _rtmpRing->write(rtmp,key_pos);
+        if(_rtmpRing){
+            _rtmpRing->write(rtmp,key_pos);
+        }
         return key_pos;
     }
 protected:
diff --git a/src/RtspMuxer/RtpCodec.h b/src/RtspMuxer/RtpCodec.h
index 59000af2..6d155a99 100644
--- a/src/RtspMuxer/RtpCodec.h
+++ b/src/RtspMuxer/RtpCodec.h
@@ -85,7 +85,6 @@ public:
     typedef std::shared_ptr<RtpRing> Ptr;
 
     RtpRing(){
-        _rtpRing = std::make_shared<RingType>();
     }
     virtual ~RtpRing(){}