v=0
o=- 20519 0 IN IP4 0.0.0.0
s=-
t=0 0
a=group:BUNDLE m0 m1 
a=group:LS m0 m1
a=ice-options:trickle
m=audio 49203 UDP/TLS/RTP/SAVPF 109 
c=IN IP4 203.0.113.77
a=mid:m0
a=msid:ma ta 
a=recvonly
a=rtpmap:109 opus/48000/2
a=maxptime:120
a=ice-ufrag:074c6550
a=ice-pwd:a28a397a4c3f31747d1ee3474af08a068
a=fingerprint:sha-256 6B:8B:F0:65:5F:78:E2:51:3B:AC:6F:F3:3F:46:1B:35:DC:B8:5F:64:1A:24:C2:43:F0:A1:58:D0:A1:2C:19:08 
a=setup:active
a=tls-id:CJ6FF9ZZMJW7MDRJIR7XVIQM48GE1G31
a=rtcp-mux
a=rtcp-rsize
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=extmap:2 urn:ietf:params:rtp-hdrext:sdes:mid
a=candidate:0 1 UDP 2113667326 198.51.100.7 51556 typ host
a=candidate:1 1 UDP 1694302206 203.0.113.77 49203 typ srflx raddr 198.51.100.7 rport 51556
a=end-of-candidates
m=video 0 UDP/TLS/RTP/SAVPF 98 101 
c=IN IP4 203.0.113.77
a=bundle-only
a=mid:m1
a=msid:ma tb 
a=recvonly
a=rtpmap:98 VP8/90000
a=rtpmap:101 rtx/90000
a=fmtp:101 apt=98;rtx-time=200
a=rtcp-fb:* nack
a=rtcp-fb:* nack pli
a=rtcp-fb:* ccm fir
a=extmap:2 urn:ietf:params:rtp-hdrext:sdes:mid
a=extmap:3 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id
a=rid:1 recv pt=98
a=simulcast:recv 1