This SDP was generated from the WebRTC Book Demo Application running on Firefox Nightly 4.0a1 (2014-07-28) with the OpenH264 Plugin installed. (Here are instructions on how to install).

SDP Offer from Firefox Nightly

{"type":"offer","sdp":"v=0 o=Mozilla-SIPUA-34.0a1 15457 0 IN IP4 0.0.0.0 s=SIP Call t=0 0 a=ice-ufrag:8300df3b a=ice-pwd:8b576385e2498545fb659b1c1a87ff0a a=fingerprint:sha-256 55:85:69:D8:F5:04:94:75:7B:4C:E7:A9:8B:81:36:AC:98:38:13:46:A0:05:22:ED:D1:93:D9:B1:DB:A8:4F:2E m=audio 51280 RTP/SAVPF 109 0 8 101 c=IN IP4 68.188.0.172 a=rtpmap:109 opus/48000/2 a=ptime:20 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=sendrecv a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level a=setup:actpass a=candidate:0 1 UDP 2130379007 172.31.99.251 51280 typ host a=candidate:1 1 UDP 1694236671 68.188.0.172 51280 typ srflx raddr 172.31.99.251 rport 51280 a=candidate:0 2 UDP 2130379006 172.31.99.251 55025 typ host a=candidate:1 2 UDP 1694236670 68.188.0.172 55025 typ srflx raddr 172.31.99.251 rport 55025 a=rtcp-mux m=video 51730 RTP/SAVPF 120 126 c=IN IP4 68.188.0.172 a=rtpmap:120 VP8/90000 a=rtpmap:126 H264/90000 a=fmtp:126 profile-level-id=42e00c;packetization-mode=1 a=sendrecv a=rtcp-fb:120 nack a=rtcp-fb:120 nack pli a=rtcp-fb:120 ccm fir a=rtcp-fb:126 nack a=rtcp-fb:126 nack pli a=rtcp-fb:126 ccm fir a=setup:actpass a=candidate:0 1 UDP 2130379007 172.31.99.251 51730 typ host a=candidate:1 1 UDP 1694236671 68.188.0.172 51730 typ srflx raddr 172.31.99.251 rport 51730 a=candidate:0 2 UDP 2130379006 172.31.99.251 52061 typ host a=candidate:1 2 UDP 1694236670 68.188.0.172 52061 typ srflx raddr 172.31.99.251 rport 52061 a=rtcp-mux m=application 62490 DTLS/SCTP 5000 c=IN IP4 68.188.0.172 a=sctpmap:5000 webrtc-datachannel 16 a=setup:actpass a=candidate:0 1 UDP 2130379007 172.31.99.251 62490 typ host a=candidate:1 1 UDP 1694236671 68.188.0.172 62490 typ srflx raddr 172.31.99.251 rport 62490 "}

You can use the WebRTC Book Demo Application to inspect the SDP generated by any browser for voice, video, and data channels. Just follow the URL twice (can even be different tabs in same browser), put in same key code, and click Call. The exchanged SDP is shown below the video.

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