整理MediaSource派生类

修复转协议或录制时忽然Track的问题

src/Rtmp/RtmpDemuxer.cpp

@@ -29,23 +29,6 @@
 
 namespace mediakit {
 
-
-RtmpDemuxer::RtmpDemuxer(const AMFValue &val) {
-    try {
-        makeVideoTrack(val["videocodecid"]);
-        makeAudioTrack(val["audiocodecid"]);
-        val.object_for_each([&](const string &key, const AMFValue &val) {
-            if (key == "duration") {
-                _fDuration = val.as_number();
-                return;
-            }
-        });
-    }catch (std::exception &ex){
-        WarnL << ex.what();
-    }
-}
-
-
 bool RtmpDemuxer::inputRtmp(const RtmpPacket::Ptr &pkt) {
     switch (pkt->typeId) {
         case MSG_VIDEO: {
@@ -86,6 +69,7 @@ void RtmpDemuxer::makeVideoTrack(const AMFValue &videoCodec) {
         if (_videoRtmpDecoder) {
             //设置rtmp解码器代理，生成的frame写入该Track
             _videoRtmpDecoder->addDelegate(_videoTrack);
+            onAddTrack(_videoTrack);
         } else {
             //找不到相应的rtmp解码器，该track无效
             _videoTrack.reset();
@@ -102,6 +86,7 @@ void RtmpDemuxer::makeAudioTrack(const AMFValue &audioCodec) {
         if (_audioRtmpDecoder) {
             //设置rtmp解码器代理，生成的frame写入该Track
             _audioRtmpDecoder->addDelegate(_audioTrack);
+            onAddTrack(_audioTrack);
         } else {
             //找不到相应的rtmp解码器，该track无效
             _audioTrack.reset();