m=video 9 RTP/SAVPF 120
c=IN IP4 0.0.0.0
a=rtcp:9 IN IP4 0.0.0.0
a=ice-ufrag:ufrag_video
a=ice-pwd:pwd_video
a=mid:video_content_name
a=sendrecv
a=rtpmap:120 VP8/90000
a=ssrc:2 cname:stream_1_cname
a=ssrc:2 msid:local_stream video_track_id_1
a=ssrc:2 mslabel:local_stream
a=ssrc:2 label:video_track_id_1