Add nack config and disable ulpfec when h264/h265 is used (#880)

Author: starwarfan

source/agent/webrtc/sdpInfo.js

@@ -249,6 +249,16 @@ class SdpInfo {
       //   }
       // }
 
+      // Remove ulpfec if h264/h265 is selected
+      const selectedCodec = codecMap.get(selectedPayload);
+      if (['h264', 'h265'].includes(selectedCodec)) {
+        codecMap.forEach((codec, pt) => {
+          if (codec === 'ulpfec') {
+            relatedPayloads.delete(pt);
+          }
+        });
+      }
+
       relatedPayloads.add(selectedPayload);
       // Remove non-selected video payload
       mediaInfo.rtp = mediaInfo.rtp.filter(

source/core/rtc_adapter/VideoReceiveAdapter.cc

@@ -191,6 +191,7 @@ void VideoReceiveAdapterImpl::CreateReceiveVideo()
             default_config.rtp.rtcp_mode = webrtc::RtcpMode::kReducedSize;
             default_config.rtp.remote_ssrc = m_config.ssrc;
             default_config.rtp.red_payload_type = RED_90000_PT;
+            default_config.rtp.nack.rtp_history_ms = 500;
             if (m_config.transport_cc) {
                 RTC_LOG(LS_INFO) << "TransportSequenceNumber Extension Enabled";
                 default_config.rtp.transport_cc = true;