sdp2

libosip2-3.0.3最新版本

v=0
o=c 3149329138 3149329165 IN IP4 38.245.76.2
s=Let's talk
c=IN IP4 x.bell-tel.com
b=CT:128
t=3149328630 0
m=audio 3456 RTP/AVP 5 0 7
a=rtpmap:5 DVI4/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:7 LPC/8000
m=video 2232 RTP/AVP 31
a=rtpmap:31 H261/90000
a=sendrecv