setRemoteDescription error: ","Answer changed id for extmap attribute at level 0 (http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01) from 7 to 4."

[hktalent]

https://github.com/pion/example-webrtc-applications/tree/f939bc71df2ae20b23049475fc8277deafe794aa/rtmp-to-webrtc

An error occurred in the browser：

setRemoteDescription error: ","Answer changed id for extmap attribute at level 0 (http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01) from 7 to 4."

sdp:

{"type":"answer","sdp":"v=0\r\no=- 2505052729681155324 1716177631 IN IP4 0.0.0.0\r\ns=-\r\nt=0 0\r\na=msid-semantic:WMS*\r\na=fingerprint:sha-256 69:59:B0:66:3E:A4:1E:A9:4E:D4:F5:9A:54:5F:7D:8A:66:D5:98:0B:CD:3B:6F:66:23:CD:C2:2F:EF:A0:4A:C2\r\na=extmap-allow-mixed\r\na=group:BUNDLE 0 1\r\nm=video 9 UDP/TLS/RTP/SAVPF 98 99 102 103 104 105 106 107 108 109\r\nc=IN IP4 0.0.0.0\r\na=setup:active\r\na=mid:0\r\na=ice-ufrag:ZMQvLPJfPDQYgdko\r\na=ice-pwd:uJPwrefxvoJENmDAnBkdztChXFCYFraL\r\na=rtcp-mux\r\na=rtcp-rsize\r\na=rtpmap:98 H264/90000\r\na=fmtp:98 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f\r\na=rtcp-fb:98 goog-remb \r\na=rtcp-fb:98 transport-cc \r\na=rtcp-fb:98 ccm fir\r\na=rtcp-fb:98 nack \r\na=rtcp-fb:98 nack pli\r\na=rtpmap:99 rtx/90000\r\na=fmtp:99 apt=98\r\na=rtpmap:102 H264/90000\r\na=fmtp:102 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f\r\na=rtcp-fb:102 goog-remb \r\na=rtcp-fb:102 transport-cc \r\na=rtcp-fb:102 ccm fir\r\na=rtcp-fb:102 nack \r\na=rtcp-fb:102 nack pli\r\na=rtpmap:103 rtx/90000\r\na=fmtp:103 apt=102\r\na=rtpmap:104 VP8/90000\r\na=rtcp-fb:104 goog-remb \r\na=rtcp-fb:104 transport-cc \r\na=rtcp-fb:104 ccm fir\r\na=rtcp-fb:104 nack \r\na=rtcp-fb:104 nack pli\r\na=rtpmap:105 rtx/90000\r\na=fmtp:105 apt=104\r\na=rtpmap:106 VP9/90000\r\na=fmtp:106 profile-id=0\r\na=rtcp-fb:106 goog-remb \r\na=rtcp-fb:106 transport-cc \r\na=rtcp-fb:106 ccm fir\r\na=rtcp-fb:106 nack \r\na=rtcp-fb:106 nack pli\r\na=rtpmap:107 rtx/90000\r\na=fmtp:107 apt=106\r\na=rtpmap:108 VP9/90000\r\na=fmtp:108 profile-id=2\r\na=rtcp-fb:108 goog-remb \r\na=rtcp-fb:108 transport-cc \r\na=rtcp-fb:108 ccm fir\r\na=rtcp-fb:108 nack \r\na=rtcp-fb:108 nack pli\r\na=rtpmap:109 rtx/90000\r\na=fmtp:109 apt=108\r\na=extmap:4 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=ssrc:2500753834 cname:pion\r\na=ssrc:2500753834 msid:pion video\r\na=ssrc:2500753834 mslabel:pion\r\na=ssrc:2500753834 label:video\r\na=msid:pion video\r\na=sendrecv\r\na=candidate:2569382870 1 udp 2130706431 192.168.0.107 51624 typ host\r\na=candidate:2569382870 2 udp 2130706431 192.168.0.107 51624 typ host\r\na=candidate:2589410501 1 udp 2130706431 192.168.64.1 49289 typ host\r\na=candidate:2589410501 2 udp 2130706431 192.168.64.1 49289 typ host\r\na=candidate:1267723428 1 udp 1694498815 171.212.126.216 9135 typ srflx raddr 0.0.0.0 rport 58273\r\na=candidate:1267723428 2 udp 1694498815 171.212.126.216 9135 typ srflx raddr 0.0.0.0 rport 58273\r\na=candidate:1267723428 1 udp 1694498815 171.212.126.216 9138 typ srflx raddr 0.0.0.0 rport 59003\r\na=candidate:1267723428 2 udp 1694498815 171.212.126.216 9138 typ srflx raddr 0.0.0.0 rport 59003\r\na=candidate:1267723428 1 udp 1694498815 171.212.126.216 9136 typ srflx raddr 0.0.0.0 rport 59231\r\na=candidate:1267723428 2 udp 1694498815 171.212.126.216 9136 typ srflx raddr 0.0.0.0 rport 59231\r\na=candidate:1267723428 1 udp 1694498815 171.212.126.216 9137 typ srflx raddr 0.0.0.0 rport 53709\r\na=candidate:1267723428 2 udp 1694498815 171.212.126.216 9137 typ srflx raddr 0.0.0.0 rport 53709\r\na=candidate:438490595 1 udp 16777215 65.49.208.113 54650 typ relay raddr 0.0.0.0 rport 49783\r\na=candidate:438490595 2 udp 16777215 65.49.208.113 54650 typ relay raddr 0.0.0.0 rport 49783\r\na=candidate:3255566946 1 udp 2130706431 fdca:b2a4:4e8c:f81f:cde:4875:ec:c767 55731 typ host\r\na=candidate:3255566946 2 udp 2130706431 fdca:b2a4:4e8c:f81f:cde:4875:ec:c767 55731 typ host\r\na=end-of-candidates\r\nm=audio 9 UDP/TLS/RTP/SAVPF 111 9 0 8\r\nc=IN IP4 0.0.0.0\r\na=setup:active\r\na=mid:1\r\na=ice-ufrag:ZMQvLPJfPDQYgdko\r\na=ice-pwd:uJPwrefxvoJENmDAnBkdztChXFCYFraL\r\na=rtcp-mux\r\na=rtcp-rsize\r\na=rtpmap:111 opus/48000/2\r\na=fmtp:111 minptime=10;useinbandfec=1\r\na=rtcp-fb:111 transport-cc \r\na=rtpmap:9 G722/8000\r\na=rtpmap:0 PCMU/8000\r\na=rtpmap:8 PCMA/8000\r\na=extmap:4 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=ssrc:2988138862 cname:pion\r\na=ssrc:2988138862 msid:pion audio\r\na=ssrc:2988138862 mslabel:pion\r\na=ssrc:2988138862 label:audio\r\na=msid:pion audio\r\na=sendonly\r\n"}

[hktalent]

now setRemoteDescription set ok,but:

$ ps -ef|grep ffmpeg
  501 32747  1151   0  2:03下午 ttys004    0:00.01 grep ffmpeg
  501 32244 32218   0  2:00下午 ttys012    8:05.78 ffmpeg -i rtsp://admin:MJAmg%40028@192.168.0.124/live/main -an -vcodec libvpx -cpu-used 5 -deadline 1 -g 10 -error-resilient 1 -auto-alt-ref 1 -f rtp rtp://127.0.0.1:1025?pkt_size=1200 -vn -c:a libopus -f rtp rtp://127.0.0.1:1024?pkt_size=1200

logs

127.0.0.1:8081Connection State has changed checking 
Got an ICE candidate:  candidate:2569382870 1 udp 2130706431 192.168.0.107 50711 typ host
Got an ICE candidate:  candidate:2589410501 1 udp 2130706431 192.168.64.1 60287 typ host
Got an ICE candidate:  candidate:3255566946 1 udp 2130706431 fdca:b2a4:4e8c:f81f:cde:4875:ec:c767 59061 typ host
Got an ICE candidate:  candidate:1267723428 1 udp 1694498815 171.212.126.216 8792 typ srflx raddr 0.0.0.0 rport 49551
Got an ICE candidate:  candidate:1267723428 1 udp 1694498815 171.212.126.216 8789 typ srflx raddr 0.0.0.0 rport 56117
Got an ICE candidate:  candidate:1267723428 1 udp 1694498815 171.212.126.216 8791 typ srflx raddr 0.0.0.0 rport 49199
Got an ICE candidate:  candidate:1267723428 1 udp 1694498815 171.212.126.216 8788 typ srflx raddr 0.0.0.0 rport 50744
Got an ICE candidate:  candidate:438490595 1 udp 16777215 65.49.208.113 57088 typ relay raddr 0.0.0.0 rport 61913
2024/05/20 14:20:46 rtsp://admin:MJAmg%40028@192.168.0.124/live/main
2024/05/20 14:20:46 rtp://127.0.0.1:1024?pkt_size=1200
2024/05/20 14:20:46 rtp://127.0.0.1:1025?pkt_size=1200
[GIN] 2024/05/20 - 14:20:47 | 200 |  419.785032ms |       127.0.0.1 | POST     "/rtsp2rtc"
Connection State has changed connected 
2024/05/20 14:20:49 rtpToTrack ReadFrom 1025 28
2024/05/20 14:20:49 rtpToTrack ReadFrom 1024 273

[hktalent]

rtsp test ok

[hktalent]

@at-wat Can you give me some help? Thank you so much