diff --git a/src/Player/Track.h b/src/Player/Track.h
index fbe0a1f9..7ab516d3 100644
--- a/src/Player/Track.h
+++ b/src/Player/Track.h
@@ -20,6 +20,12 @@ public:
     typedef std::shared_ptr<Track> Ptr;
     Track(){}
     virtual ~Track(){}
+
+    /**
+     * 是否准备好
+     * @return
+     */
+    virtual bool ready() = 0;
 };
 
 class VideoTrack : public Track {
@@ -152,11 +158,8 @@ public:
         return _fps;
     }
 
-    TrackType getTrackType() const override {
-        if(_sps.empty() || _pps.empty()){
-            return TrackInvalid;
-        }
-        return TrackVideo;
+    bool ready() override {
+        return !_sps.empty() && !_pps.empty();
     }
 
 
@@ -295,12 +298,11 @@ public:
      * 在获取aac_cfg前是无效的Track
      * @return
      */
-    TrackType getTrackType() const override {
-        if(_cfg.empty()){
-            return TrackInvalid;
-        }
-        return TrackAudio;
+    bool ready() override {
+        return !_cfg.empty();
     }
+
+
     /**
     * 返回音频采样率
     * @return
diff --git a/src/RtmpMuxer/RtmpDemuxer.cpp b/src/RtmpMuxer/RtmpDemuxer.cpp
index 574aa1d0..8817b587 100644
--- a/src/RtmpMuxer/RtmpDemuxer.cpp
+++ b/src/RtmpMuxer/RtmpDemuxer.cpp
@@ -29,6 +29,7 @@
 
 namespace mediakit {
 
+
 RtmpDemuxer::RtmpDemuxer(const AMFValue &val) {
     try {
         makeVideoTrack(val["videocodecid"]);
@@ -44,17 +45,14 @@ RtmpDemuxer::RtmpDemuxer(const AMFValue &val) {
     }
 }
 
-RtmpDemuxer::~RtmpDemuxer() {
-}
-
 bool RtmpDemuxer::inputRtmp(const RtmpPacket::Ptr &pkt) {
     switch (pkt->typeId) {
         case MSG_VIDEO: {
             if(_videoRtmpDecoder){
                 return _videoRtmpDecoder->inputRtmp(pkt, true);
             }
-            if(!_tryGetVideoTrack){
-                _tryGetVideoTrack = true;
+            if(!_tryedGetVideoTrack){
+                _tryedGetVideoTrack = true;
                 auto codec = AMFValue(pkt->getMediaType());
                 makeVideoTrack(codec);
             }
@@ -66,8 +64,8 @@ bool RtmpDemuxer::inputRtmp(const RtmpPacket::Ptr &pkt) {
                 _audioRtmpDecoder->inputRtmp(pkt, false);
                 return false;
             }
-            if(!_tryGetAudioTrack) {
-                _tryGetAudioTrack = true;
+            if(!_tryedGetAudioTrack) {
+                _tryedGetAudioTrack = true;
                 auto codec = AMFValue(pkt->getMediaType());
                 makeAudioTrack(codec);
             }
@@ -122,16 +120,22 @@ vector<Track::Ptr> RtmpDemuxer::getTracks() const {
 }
 
 bool RtmpDemuxer::isInited() const {
-    bool ret = true;
-    if(ret && _audioTrack){
-        //getTrackType() 等于TrackInvalid时说明该Track还未准备好
-        ret = _audioTrack->getTrackType() != TrackInvalid;
+    bool videoReady ,auidoReady;
+
+    if(_videoTrack){
+        //getTrackType() != TrackInvalid说明其已经准备好了
+        videoReady = _videoTrack->ready();
+    }else{
+        videoReady = _tryedGetVideoTrack || _tryedGetAudioTrack;
     }
-    if(ret && _videoTrack){
-        //getTrackType() 等于TrackInvalid时说明该Track还未准备好
-        ret = _videoTrack->getTrackType() != TrackInvalid;
+
+    if(_audioTrack){
+        auidoReady = _audioTrack->ready();
+    }else{
+        auidoReady = _tryedGetVideoTrack || _tryedGetAudioTrack;
     }
-    return ret;
+
+    return videoReady && auidoReady;
 }
 
 float RtmpDemuxer::getDuration() const {
diff --git a/src/RtmpMuxer/RtmpDemuxer.h b/src/RtmpMuxer/RtmpDemuxer.h
index 344fb94c..2c610222 100644
--- a/src/RtmpMuxer/RtmpDemuxer.h
+++ b/src/RtmpMuxer/RtmpDemuxer.h
@@ -43,8 +43,19 @@ namespace mediakit {
 class RtmpDemuxer : public PlayerBase{
 public:
 	typedef std::shared_ptr<RtmpDemuxer> Ptr;
+
+	/**
+	 * 等效于RtmpDemuxer(AMFValue(AMF_NULL))
+	 */
+	RtmpDemuxer(){}
+	/**
+	 * 构造rtmp解复用器
+	 * @param val rtmp的metedata，可以传入null类型，
+	 * 这样就会在inputRtmp时异步探测媒体编码格式
+	 */
 	RtmpDemuxer(const AMFValue &val);
-	virtual ~RtmpDemuxer();
+
+	virtual ~RtmpDemuxer(){};
 
 	/**
 	 * 开始解复用
@@ -77,8 +88,8 @@ private:
 	void makeAudioTrack(const AMFValue &val);
 private:
 	float _fDuration = 0;
-	bool _tryGetVideoTrack = false;
-	bool _tryGetAudioTrack = false;
+	bool _tryedGetVideoTrack = false;
+	bool _tryedGetAudioTrack = false;
 	AudioTrack::Ptr _audioTrack;
 	VideoTrack::Ptr _videoTrack;
 	RtmpCodec::Ptr _audioRtmpDecoder;
diff --git a/src/RtspMuxer/RtspDemuxer.cpp b/src/RtspMuxer/RtspDemuxer.cpp
index 60883338..99819075 100644
--- a/src/RtspMuxer/RtspDemuxer.cpp
+++ b/src/RtspMuxer/RtspDemuxer.cpp
@@ -135,16 +135,17 @@ vector<Track::Ptr> RtspDemuxer::getTracks() const {
 }
 
 bool RtspDemuxer::isInited() const {
-	bool ret = true;
-	if(ret && _audioTrack){
-		//getTrackType() 等于TrackInvalid时说明该Track还未准备好
-		ret = _audioTrack->getTrackType() != TrackInvalid;
-	}
-	if(ret && _videoTrack){
-		//getTrackType() 等于TrackInvalid时说明该Track还未准备好
-		ret = _videoTrack->getTrackType() != TrackInvalid;
-	}
-	return ret;
+    bool videoReady = true ,auidoReady = true;
+
+    if(_videoTrack){
+        videoReady = _videoTrack->ready();
+    }
+
+    if(_audioTrack){
+        auidoReady = _audioTrack->ready();
+    }
+
+    return videoReady && auidoReady;
 }
 
 float RtspDemuxer::getDuration() const {