修复webrtc模块循环引用导致的内存泄露问题：#1024

webrtc/WebRtcTransport.cpp

@@ -436,7 +436,7 @@ void WebRtcTransportImp::onStartWebRTC() {
         if (m_offer->type != TrackApplication) {
         if (m_offer->type != TrackApplication) {
             //记录rtp ext类型与id的关系，方便接收或发送rtp时修改rtp ext id
             //记录rtp ext类型与id的关系，方便接收或发送rtp时修改rtp ext id
             track->rtp_ext_ctx = std::make_shared<RtpExtContext>(*m_offer);
             track->rtp_ext_ctx = std::make_shared<RtpExtContext>(*m_offer);
-            track->rtp_ext_ctx->setOnGetRtp([this, track](uint8_t pt, uint32_t ssrc, const string &rid) {
+            track->rtp_ext_ctx->setOnGetRtp([this, &track](uint8_t pt, uint32_t ssrc, const string &rid) {
                 //ssrc --> MediaTrack
                 //ssrc --> MediaTrack
                 _ssrc_to_track[ssrc] = track;
                 _ssrc_to_track[ssrc] = track;
                 InfoL << "get rtp, pt:" << (int) pt << ", ssrc:" << ssrc << ", rid:" << rid;
                 InfoL << "get rtp, pt:" << (int) pt << ", ssrc:" << ssrc << ", rid:" << rid;