修复Rtmp复用器循环引用的bug

src/Rtmp/RtmpMediaSource.h

@@ -80,8 +80,7 @@ public:
 	virtual void onGetMetaData(const AMFValue &metadata) {
 		lock_guard<recursive_mutex> lock(_mtxMap);
 		_metadata = metadata;
-		RtmpDemuxer parser(metadata);
-		_iCfgFrameSize = parser.getTracks().size();
+		_iCfgFrameSize = RtmpDemuxer::getTrackCount(metadata);
 		if(ready()){
 			MediaSource::regist();
 			_bRegisted = true;

src/RtmpMuxer/RtmpDemuxer.cpp

@@ -45,6 +45,10 @@ RtmpDemuxer::RtmpDemuxer(const AMFValue &val) {
     }
 }
 
+int RtmpDemuxer::getTrackCount(const AMFValue &metedata) {
+    return (int)(metedata["videocodecid"].type() != AMF_NULL) + (int)(metedata["audiocodecid"].type() != AMF_NULL);
+}
+
 bool RtmpDemuxer::inputRtmp(const RtmpPacket::Ptr &pkt) {
     switch (pkt->typeId) {
         case MSG_VIDEO: {

src/RtmpMuxer/RtmpDemuxer.h

@@ -55,6 +55,14 @@ public:
 	 */
 	RtmpDemuxer(const AMFValue &val);
 
+	/**
+	 *
+	 * 获取rtmp track 数
+	 * @param metedata rtmp的metedata
+	 * @return
+	 */
+	static int getTrackCount(const AMFValue &metedata);
+
 	virtual ~RtmpDemuxer(){};
 
 	/**

src/RtmpMuxer/RtmpMuxer.cpp

@@ -39,7 +39,8 @@ RtmpMuxer::RtmpMuxer(const TitleMete::Ptr &title) {
 
 void RtmpMuxer::onTrackReady(const Track::Ptr &track) {
     //生成rtmp编码器
-    auto encoder = Factory::getRtmpCodecByTrack(track);
+    //克隆该Track，防止循环引用
+    auto encoder = Factory::getRtmpCodecByTrack(track->clone());
     if (!encoder) {
         return;
     }