v=0
o=Mozilla-SIPUA-35.0a1 5184 0 IN IP4 0.0.0.0
s=SIP Call
c=IN IP4 224.0.0.1/100/12
t=0 0
a=mid:foobar
m=video 9 RTP/SAVPF 120
c=IN IP4 0.0.0.0
a=rtpmap:120 VP8/90000