diff --git a/src/Rtsp/RtspPlayer.cpp b/src/Rtsp/RtspPlayer.cpp
index 9ad850b6..7886036c 100644
--- a/src/Rtsp/RtspPlayer.cpp
+++ b/src/Rtsp/RtspPlayer.cpp
@@ -280,7 +280,7 @@ void RtspPlayer::handleResDESCRIBE(const Parser& parser) {
 	_aTrackInfo = _sdpAttr.getAvailableTrack();
 
 	if (_aTrackInfo.empty()) {
-		throw std::runtime_error("解析SDP失败");
+		throw std::runtime_error("无有效的Sdp Track");
 	}
 	if (!onCheckSDP(strSdp, _sdpAttr)) {
 		throw std::runtime_error("onCheckSDP faied");
diff --git a/src/Rtsp/RtspSession.cpp b/src/Rtsp/RtspSession.cpp
index 178c1098..80139b24 100644
--- a/src/Rtsp/RtspSession.cpp
+++ b/src/Rtsp/RtspSession.cpp
@@ -664,7 +664,7 @@ bool RtspSession::handleReq_Setup() {
 }
 
 bool RtspSession::handleReq_Play() {
-	if (_uiTrackCnt == 0) {
+	if (_aTrackInfo.size() == 0) {
 		//还没有Describe
 		return false;
 	}
@@ -731,11 +731,11 @@ bool RtspSession::handleReq_Play() {
             }else{
                 iStamp = pMediaSrc->getStamp();
             }
-            for (unsigned int i = 0; i < _uiTrackCnt; i++) {
-                auto &track = _aTrackInfo[i];
-                track->ssrc = pMediaSrc->getSsrc(track->type);
-                track->seq = pMediaSrc->getSeqence(track->type);
-                track->timeStamp = pMediaSrc->getTimestamp(track->type);
+
+            for(auto &track : _aTrackInfo){
+				track->ssrc = pMediaSrc->getSsrc(track->type);
+				track->seq = pMediaSrc->getSeqence(track->type);
+				track->timeStamp = pMediaSrc->getTimestamp(track->type);
             }
         }
         _bFirstPlay = false;
@@ -748,16 +748,15 @@ bool RtspSession::handleReq_Play() {
                                    "RTP-Info: ", _iCseq, SERVER_NAME, RTSP_VERSION, RTSP_BUILDTIME,
                            dateHeader().data(), _strSession.data(),iStamp/1000.0);
 
-        for (unsigned int i = 0; i < _uiTrackCnt; i++) {
-            auto &track = _aTrackInfo[i];
-            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);
-        }
+		for(auto &track : _aTrackInfo){
+			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 -= 1;
         (_pcBuf)[iLen] = '\0';
         iLen += sprintf(_pcBuf + iLen, "\r\n\r\n");
@@ -897,21 +896,18 @@ inline bool RtspSession::findStream() {
 
 	_sdpAttr.load(_strSdp);
 	_aTrackInfo = _sdpAttr.getAvailableTrack();
-	_uiTrackCnt = _aTrackInfo.size();
 
-	if (_uiTrackCnt == 0 || _uiTrackCnt > 2) {
+	if (_aTrackInfo.empty()) {
 		return false;
 	}
 	_strSession = makeRandStr(12);
 	_pMediaSrc = pMediaSrc;
 
-	for (unsigned int i = 0; i < _uiTrackCnt; i++) {
-		auto &track = _aTrackInfo[i];
+	for(auto &track : _aTrackInfo){
 		track->ssrc = pMediaSrc->getSsrc(track->type);
 		track->seq = pMediaSrc->getSeqence(track->type);
 		track->timeStamp = pMediaSrc->getTimestamp(track->type);
 	}
-
 	return true;
 }
 
@@ -972,7 +968,7 @@ inline void RtspSession::onRcvPeerUdpData(int iTrackIdx, const Buffer::Ptr &pBuf
 			_apPeerUdpAddr[iTrackIdx / 2].reset(new struct sockaddr(addr));
 			_abGotPeerUdp[iTrackIdx / 2] = true;
 			_bGotAllPeerUdp = true;//先假设获取到完整的rtp探测包
-			for (unsigned int i = 0; i < _uiTrackCnt; i++) {
+			for (unsigned int i = 0; i < _aTrackInfo.size(); i++) {
 				if (!_abGotPeerUdp[i]) {
 					//还有track没获取到rtp探测包
 					_bGotAllPeerUdp = false;
diff --git a/src/Rtsp/RtspSession.h b/src/Rtsp/RtspSession.h
index 3af1a152..8a1fde00 100644
--- a/src/Rtsp/RtspSession.h
+++ b/src/Rtsp/RtspSession.h
@@ -117,7 +117,7 @@ private:
 		return tmp;
 	}
 	inline int getTrackIndexByTrackType(TrackType type) {
-		for (unsigned int i = 0; i < _uiTrackCnt; i++) {
+		for (unsigned int i = 0; i < _aTrackInfo.size(); i++) {
 			if (type == _aTrackInfo[i]->type) {
 				return i;
 			}
@@ -125,7 +125,7 @@ private:
 		return -1;
 	}
     inline int getTrackIndexByControlSuffix(const string &controlSuffix) {
-        for (unsigned int i = 0; i < _uiTrackCnt; i++) {
+        for (unsigned int i = 0; i < _aTrackInfo.size(); i++) {
             if (controlSuffix == _aTrackInfo[i]->_control_surffix) {
                 return i;
             }
@@ -163,7 +163,6 @@ private:
 	int _iCseq = 0;
 
 	SdpAttr _sdpAttr;
-	unsigned int _uiTrackCnt = 0; //媒体track个数
 	vector<SdpTrack::Ptr> _aTrackInfo;
 
 	bool _bGotAllPeerUdp = false;