v=0 o=- 20518 0 IN IP4 0.0.0.0 s=- t=0 0 a=group:BUNDLE audio a=ice-options:trickle m=audio 54609 UDP/TLS/RTP/SAVPF 109 0 8 c=IN IP4 203.0.113.141 a=mid:audio a=msid:ma ta a=sendrecv a=rtpmap:109 opus/48000/2 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=maxptime:120 a=ice-ufrag:074c6550 a=ice-pwd:a28a397a4c3f31747d1ee3474af08a068 a=fingerprint:sha-256 19:E2:1C:3B:4B:9F:81:E6:B8:5C:F4:A5:A8:D8:73:04:BB:05:2F:70:9F:04:A9:0E:05:E9:26:33:E8:70:88:A2 a=setup:actpass a=tls-id:89J2LRATQ3ULA24G9AHWVR31VJWSLB68 a=rtcp-mux a=rtcp-rsize a=rtcp-fb:* nack a=extmap:1/recvonly urn:ietf:params:rtp-hdrext:csrc-audio-level a=extmap:2 urn:ietf:params:rtp-hdrext:ssrc-audio-level a=extmap:3 urn:ietf:params:rtp-hdrext:sdes:mid a=candidate:0 1 UDP 2113667327 192.0.2.4 61665 typ host a=candidate:1 1 UDP 694302207 203.0.113.141 54609 typ srflx raddr 192.0.2.4 rport 61665 a=end-of-candidates