A.18 SDP offers and answers for ITT4RT
26.1143GPPIP Multimedia Subsystem (IMS)Media handling and interactionMultimedia telephonyRelease 18TS
Table A.18.1 shows an example of an SDP offer for an ITT4RT session with a 360 video, 2 overlay streams, and a scene description.
Table A.18.1: Example SDP offer with scene description signalling
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SDP offer |
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v=0 o=ITT4RT 3413526809 0 IN IP4 server.example.com s=Example of using AS in MTSI c=IN IP4 aaa.bbb.ccc.ddd b=AS:345 t=0 0 a=tcap:1 RTP/AVPF a=itt3rt_group: 1 2 3 m=video 49154 RTP/AVP 99 a=pcfg:1 t=1 b=AS:315 b=RS:0 b=RR:5000 a=rtpmap:99 H264/90000 a=fmtp:99 packetization-mode=0; profile-level-id=42e00c; \ sprop-parameter-sets=J0LgDJWgUH6Af1A=,KM46gA== a=3gpp_360video: Stereo a=mid:1 m=video 49154 RTP/AVP 99 a=pcfg:1 t=1 b=AS:315 b=RS:0 b=RR:5000 a=rtpmap:99 H264/90000 a=fmtp:99 packetization-mode=0; profile-level-id=42e00c; \ sprop-parameter-sets=J0LgDJWgUH6Af1A=,KM46gA== a=mid:2 a=3gpp_overlay:2 1 0,0,0,0,0,0,0,0,0,0 m=video 49154 RTP/AVP 99 a=pcfg:1 t=1 b=AS:315 b=RS:0 b=RR:5000 a=rtpmap:99 H264/90000 a=fmtp:99 packetization-mode=0; profile-level-id=42e00c; \ sprop-parameter-sets=J0LgDJWgUH6Af1A=,KM46gA== a=mid:3 a=3gpp_overlay:3 1 0,0,0,0,0,0,0,0,0,0 m=application 52718 UDP/DTLS/SCTP webrtc-datachannel b=AS:500 a=sctp-port:5002 a=max-message-size:1024 a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB a=tls-id: abc3de65cddef001be82 a=dcmap:110 subprotocol="mpeg-sd" a=mid:4 |
Annex AA (informative):
IANA registration information for Data Channel Sub-protocols