diff --git a/src/Rtsp/Rtsp.cpp b/src/Rtsp/Rtsp.cpp
index 4804ea9c..428b0373 100644
--- a/src/Rtsp/Rtsp.cpp
+++ b/src/Rtsp/Rtsp.cpp
@@ -110,13 +110,13 @@ void SdpAttr::load(const string &sdp) {
 	for (auto &pr : _track_map) {
 		auto &track = *pr.second;
 		if (pr.first == "") {
-			track.type = TrackTitle;
+			track._type = TrackTitle;
 		} else if (pr.first == "video") {
-			track.type = TrackVideo;
+			track._type = TrackVideo;
 		} else if (pr.first == "audio") {
-			track.type = TrackAudio;
+			track._type = TrackAudio;
 		} else {
-			track.type = TrackInvalid;
+			track._type = TrackInvalid;
 		}
 
 		auto it = track._attr.find("range");
@@ -165,7 +165,7 @@ bool SdpAttr::available() const {
 
 SdpTrack::Ptr SdpAttr::getTrack(TrackType type) const {
 	for (auto &pr : _track_map){
-		if(pr.second->type == type){
+		if(pr.second->_type == type){
 			return pr.second;
 		}
 	}
diff --git a/src/Rtsp/Rtsp.h b/src/Rtsp/Rtsp.h
index bdd466cd..74053d41 100644
--- a/src/Rtsp/Rtsp.h
+++ b/src/Rtsp/Rtsp.h
@@ -63,13 +63,13 @@ public:
 	string _fmtp;
 	string _control;
 	string _control_surffix;
-	TrackType type;
+	TrackType _type;
 public:
-    uint8_t interleaved = 0;
-    bool inited = false;
-    uint32_t ssrc = 0;
-    uint16_t seq = 0;
-    uint32_t timeStamp = 0;
+    uint8_t _interleaved = 0;
+    bool _inited = false;
+    uint32_t _ssrc = 0;
+    uint16_t _seq = 0;
+    uint32_t _time_stamp = 0;
 };
 class SdpAttr {
 public:
diff --git a/src/Rtsp/RtspMediaSource.h b/src/Rtsp/RtspMediaSource.h
index 136208a4..078efb09 100644
--- a/src/Rtsp/RtspMediaSource.h
+++ b/src/Rtsp/RtspMediaSource.h
@@ -71,31 +71,45 @@ public:
 	}
 
 	virtual uint32_t getSsrc(TrackType trackType) {
-		return _mapTracks[trackType].ssrc;
+		auto track = _sdpAttr.getTrack(trackType);
+		if(!track){
+			return 0;
+		}
+		return track->_ssrc;
 	}
 	virtual uint16_t getSeqence(TrackType trackType) {
-		return _mapTracks[trackType].seq;
+		auto track = _sdpAttr.getTrack(trackType);
+		if(!track){
+			return 0;
+		}
+		return track->_seq;
 	}
 	virtual uint32_t getTimestamp(TrackType trackType) {
-		return _mapTracks[trackType].timeStamp;
+		auto track = _sdpAttr.getTrack(trackType);
+		if(!track){
+			return 0;
+		}
+		return track->_time_stamp;
 	}
 
 	virtual void onGetSDP(const string& sdp) {
 		//派生类设置该媒体源媒体描述信息
 		_strSdp = sdp;
+		_sdpAttr.load(sdp);
 		regist();
 	}
 
 	void onWrite(const RtpPacket::Ptr &rtppt, bool keyPos) override {
-		auto &trackRef = _mapTracks[rtppt->type];
-		trackRef.seq = rtppt->sequence;
-		trackRef.timeStamp = rtppt->timeStamp;
-		trackRef.ssrc = rtppt->ssrc;
-		trackRef.type = rtppt->type;
+		auto track = _sdpAttr.getTrack(rtppt->type);
+		if(track){
+			track->_seq = rtppt->sequence;
+			track->_time_stamp = rtppt->timeStamp;
+			track->_ssrc = rtppt->ssrc;
+		}
 		_pRing->write(rtppt,keyPos);
 	}
 protected:
-	unordered_map<int, SdpTrack> _mapTracks;
+	SdpAttr _sdpAttr;
     string _strSdp; //媒体描述信息
     RingType::Ptr _pRing; //rtp环形缓冲
 };
diff --git a/src/Rtsp/RtspPlayer.cpp b/src/Rtsp/RtspPlayer.cpp
index 7886036c..86673030 100644
--- a/src/Rtsp/RtspPlayer.cpp
+++ b/src/Rtsp/RtspPlayer.cpp
@@ -287,10 +287,6 @@ void RtspPlayer::handleResDESCRIBE(const Parser& parser) {
 	}
 
 	CLEAR_ARR(_aui32SsrcErrorCnt)
-	for (auto &track : _aTrackInfo) {
-		track->ssrc=0;
-	}
-
 	sendSetup(0);
 }
 //发送SETUP命令
@@ -302,7 +298,7 @@ bool RtspPlayer::sendSetup(unsigned int trackIndex) {
 	switch (_eType) {
 		case RTP_TCP: {
 			StrCaseMap header;
-			header["Transport"] = StrPrinter << "RTP/AVP/TCP;unicast;interleaved=" << track->type * 2 << "-" << track->type * 2 + 1;
+			header["Transport"] = StrPrinter << "RTP/AVP/TCP;unicast;interleaved=" << track->_type * 2 << "-" << track->_type * 2 + 1;
 			return sendRtspRequest("SETUP",baseUrl,header);
 		}
 			break;
@@ -352,7 +348,7 @@ void RtspPlayer::handleResSETUP(const Parser &parser, unsigned int uiTrackIndex)
 
 	if(_eType == RTP_TCP)  {
 		string interleaved = FindField( FindField((strTransport + ";").c_str(), "interleaved=", ";").c_str(), NULL, "-");
-		_aTrackInfo[uiTrackIndex]->interleaved = atoi(interleaved.c_str());
+		_aTrackInfo[uiTrackIndex]->_interleaved = atoi(interleaved.c_str());
 	}else{
 		const char *strPos = (_eType == RTP_MULTICAST ? "port=" : "server_port=") ;
 		auto port_str = FindField((strTransport + ";").c_str(), strPos, ";");
@@ -589,7 +585,7 @@ bool RtspPlayer::handleOneRtp(int iTrackidx, unsigned char *pucData, unsigned in
 	auto &track = _aTrackInfo[iTrackidx];
 	auto pt_ptr=_pktPool.obtain();
 	auto &rtppt=*pt_ptr;
-	rtppt.interleaved = track->interleaved;
+	rtppt.interleaved = track->_interleaved;
 	rtppt.length = uiLen + 4;
 
 	rtppt.mark = pucData[1] >> 7;
@@ -603,15 +599,15 @@ bool RtspPlayer::handleOneRtp(int iTrackidx, unsigned char *pucData, unsigned in
 	//ssrc
 	memcpy(&rtppt.ssrc,pucData+8,4);//内存对齐
 	rtppt.ssrc = ntohl(rtppt.ssrc);
-	rtppt.type = track->type;
-	if (track->ssrc == 0) {
-		track->ssrc = rtppt.ssrc;
+	rtppt.type = track->_type;
+	if (track->_ssrc == 0) {
+		track->_ssrc = rtppt.ssrc;
 		//保存SSRC
-	} else if (track->ssrc != rtppt.ssrc) {
+	} else if (track->_ssrc != rtppt.ssrc) {
 		//ssrc错误
 		WarnL << "ssrc错误";
 		if (_aui32SsrcErrorCnt[iTrackidx]++ > 10) {
-			track->ssrc = rtppt.ssrc;
+			track->_ssrc = rtppt.ssrc;
 			WarnL << "ssrc更换!";
 		}
 		return false;
@@ -815,7 +811,7 @@ int RtspPlayer::getTrackIndexByControlSuffix(const string &controlSuffix) const{
 }
 int RtspPlayer::getTrackIndexByInterleaved(int interleaved) const{
 	for (unsigned int i = 0; i < _aTrackInfo.size(); i++) {
-		if (_aTrackInfo[i]->interleaved == interleaved) {
+		if (_aTrackInfo[i]->_interleaved == interleaved) {
 			return i;
 		}
 	}
@@ -824,7 +820,7 @@ int RtspPlayer::getTrackIndexByInterleaved(int interleaved) const{
 
 int RtspPlayer::getTrackIndexByTrackType(TrackType trackType) const {
 	for (unsigned int i = 0; i < _aTrackInfo.size(); i++) {
-		if (_aTrackInfo[i]->type == trackType) {
+		if (_aTrackInfo[i]->_type == trackType) {
 			return i;
 		}
 	}
diff --git a/src/Rtsp/RtspPlayerImp.h b/src/Rtsp/RtspPlayerImp.h
index 7ea46c17..f9446ae6 100644
--- a/src/Rtsp/RtspPlayerImp.h
+++ b/src/Rtsp/RtspPlayerImp.h
@@ -67,7 +67,7 @@ private:
 		if(_pRtspMediaSrc){
 			_pRtspMediaSrc->onGetSDP(sdp);
 		}
-        _parser.reset(new RtspDemuxer(sdp));
+        _parser.reset(new RtspDemuxer(sdpAttr));
         return true;
 	}
 	void onRecvRTP(const RtpPacket::Ptr &rtppt, const SdpTrack::Ptr &track) override {
diff --git a/src/Rtsp/RtspSession.cpp b/src/Rtsp/RtspSession.cpp
index 80139b24..5a826a87 100644
--- a/src/Rtsp/RtspSession.cpp
+++ b/src/Rtsp/RtspSession.cpp
@@ -512,11 +512,11 @@ bool RtspSession::handleReq_Setup() {
 		return false;
 	}
 	SdpTrack::Ptr &trackRef = _aTrackInfo[trackIdx];
-	if (trackRef->inited) {
+	if (trackRef->_inited) {
 		//已经初始化过该Track
 		return false;
 	}
-	trackRef->inited = true; //现在初始化
+	trackRef->_inited = true; //现在初始化
 
 	auto strongRing = _pWeakRing.lock();
 	if (!strongRing) {
@@ -562,9 +562,9 @@ bool RtspSession::handleReq_Setup() {
 				"x-Dynamic-Rate: 1\r\n\r\n",
 				_iCseq, SERVER_NAME,
 				RTSP_VERSION, RTSP_BUILDTIME,
-				dateHeader().data(), trackRef->type * 2,
-                trackRef->type * 2 + 1,
-				printSSRC(trackRef->ssrc).data(),
+				dateHeader().data(), trackRef->_type * 2,
+                trackRef->_type * 2 + 1,
+				printSSRC(trackRef->_ssrc).data(),
 				_strSession.data());
 		SocketHelper::send(_pcBuf, iLen);
 	}
@@ -609,7 +609,7 @@ bool RtspSession::handleReq_Setup() {
 				RTSP_VERSION, RTSP_BUILDTIME,
 				dateHeader().data(), strClientPort.data(),
 				pSockRtp->get_local_port(), pSockRtcp->get_local_port(),
-				printSSRC(trackRef->ssrc).data(),
+				printSSRC(trackRef->_ssrc).data(),
 				_strSession.data());
 		SocketHelper::send(_pcBuf, n);
 	}
@@ -630,7 +630,7 @@ bool RtspSession::handleReq_Setup() {
 				strongSelf->safeShutdown();
 			});
 		}
-		int iSrvPort = _pBrdcaster->getPort(trackRef->type);
+		int iSrvPort = _pBrdcaster->getPort(trackRef->_type);
 		//我们用trackIdx区分rtp和rtcp包
 		auto pSockRtcp = UDPServer::Instance().getSock(get_local_ip().data(),2*trackIdx + 1,iSrvPort + 1);
 		if (!pSockRtcp) {
@@ -652,7 +652,7 @@ bool RtspSession::handleReq_Setup() {
 				RTSP_VERSION, RTSP_BUILDTIME,
 				dateHeader().data(), _pBrdcaster->getIP().data(),
 				get_local_ip().data(), iSrvPort, pSockRtcp->get_local_port(),
-				udpTTL,printSSRC(trackRef->ssrc).data(),
+				udpTTL,printSSRC(trackRef->_ssrc).data(),
 				_strSession.data());
 		SocketHelper::send(_pcBuf, n);
 	}
@@ -733,9 +733,9 @@ bool RtspSession::handleReq_Play() {
             }
 
             for(auto &track : _aTrackInfo){
-				track->ssrc = pMediaSrc->getSsrc(track->type);
-				track->seq = pMediaSrc->getSeqence(track->type);
-				track->timeStamp = pMediaSrc->getTimestamp(track->type);
+				track->_ssrc = pMediaSrc->getSsrc(track->_type);
+				track->_seq = pMediaSrc->getSeqence(track->_type);
+				track->_time_stamp = pMediaSrc->getTimestamp(track->_type);
             }
         }
         _bFirstPlay = false;
@@ -749,12 +749,12 @@ bool RtspSession::handleReq_Play() {
                            dateHeader().data(), _strSession.data(),iStamp/1000.0);
 
 		for(auto &track : _aTrackInfo){
-			if (track->inited == false) {
+			if (track->_inited == false) {
 				//还有track没有setup
 				shutdown();
 				return;
 			}
-			iLen += sprintf(_pcBuf + iLen, "url=%s/%s;seq=%d;rtptime=%u,", _strUrl.data(), track->_control_surffix.data(), track->seq,track->timeStamp);
+			iLen += sprintf(_pcBuf + iLen, "url=%s/%s;seq=%d;rtptime=%u,", _strUrl.data(), track->_control_surffix.data(), track->_seq,track->_time_stamp);
 		}
 
         iLen -= 1;
@@ -904,9 +904,9 @@ inline bool RtspSession::findStream() {
 	_pMediaSrc = pMediaSrc;
 
 	for(auto &track : _aTrackInfo){
-		track->ssrc = pMediaSrc->getSsrc(track->type);
-		track->seq = pMediaSrc->getSeqence(track->type);
-		track->timeStamp = pMediaSrc->getTimestamp(track->type);
+		track->_ssrc = pMediaSrc->getSsrc(track->_type);
+		track->_seq = pMediaSrc->getSeqence(track->_type);
+		track->_time_stamp = pMediaSrc->getTimestamp(track->_type);
 	}
 	return true;
 }
diff --git a/src/Rtsp/RtspSession.h b/src/Rtsp/RtspSession.h
index 8a1fde00..5bf1ff64 100644
--- a/src/Rtsp/RtspSession.h
+++ b/src/Rtsp/RtspSession.h
@@ -118,7 +118,7 @@ private:
 	}
 	inline int getTrackIndexByTrackType(TrackType type) {
 		for (unsigned int i = 0; i < _aTrackInfo.size(); i++) {
-			if (type == _aTrackInfo[i]->type) {
+			if (type == _aTrackInfo[i]->_type) {
 				return i;
 			}
 		}
diff --git a/src/Rtsp/RtspToRtmpMediaSource.h b/src/Rtsp/RtspToRtmpMediaSource.h
index fac15a87..eea671ee 100644
--- a/src/Rtsp/RtspToRtmpMediaSource.h
+++ b/src/Rtsp/RtspToRtmpMediaSource.h
@@ -49,8 +49,9 @@ public:
 	virtual ~RtspToRtmpMediaSource();
 
 	virtual void onGetSDP(const string& strSdp) override{
+		RtspMediaSource::onGetSDP(strSdp);
 		try {
-			_pParser.reset(new RtspDemuxer(strSdp));
+			_pParser.reset(new RtspDemuxer(_sdpAttr));
             _pRecorder.reset(new MediaRecorder(getVhost(),getApp(),getId(),_pParser,_bEnableHls,_bEnableMp4));
 			//todo(xzl) 修复此处
 //			_pParser->setOnAudioCB( std::bind(&RtspToRtmpMediaSource::onGetAAC, this, placeholders::_1));
@@ -59,7 +60,6 @@ public:
 		} catch (exception &ex) {
 			WarnL << ex.what();
 		}
-		RtspMediaSource::onGetSDP(strSdp);
 	}
 	virtual void onWrite(const RtpPacket::Ptr &pRtppkt, bool bKeyPos) override{
 		if (_pParser) {
@@ -73,20 +73,9 @@ public:
 	}
 
 	void updateTimeStamp(uint32_t uiStamp) {
-		for (auto &pr : _mapTracks) {
-			switch (pr.second.type) {
-			case TrackAudio: {
-				//todo(xzl) 修复此处
-//				pr.second.timeStamp = uiStamp * (_pParser->getAudioSampleRate() / 1000.0);
-			}
-				break;
-			case TrackVideo: {
-				pr.second.timeStamp = uiStamp * 90;
-			}
-				break;
-			default:
-				break;
-			}
+		auto tracks = _sdpAttr.getAvailableTrack();
+		for (auto &track : tracks) {
+			track->_time_stamp  = uiStamp * (track->_samplerate / 1000.0);
 		}
 	}
 
diff --git a/src/RtspMuxer/RtspDemuxer.cpp b/src/RtspMuxer/RtspDemuxer.cpp
index 0e842df7..c27286ef 100644
--- a/src/RtspMuxer/RtspDemuxer.cpp
+++ b/src/RtspMuxer/RtspDemuxer.cpp
@@ -61,7 +61,7 @@ RtspDemuxer::RtspDemuxer(const SdpAttr &attr) {
 void RtspDemuxer::loadSdp(const SdpAttr &attr) {
 	auto tracks = attr.getAvailableTrack();
 	for (auto &track : tracks){
-		switch (track->type) {
+		switch (track->_type) {
 			case TrackVideo: {
 				makeVideoTrack(track);
 			}