o = alice 2890844526 2890844526 IN IP4 host.atlanta.example.com
s =
c = IN IP4 host.atlanta.example.com
t = 0 0
m =音频49170 RTP / AVP 0 8 97
a = rtpmap:0 PCMU / 8000
a = rtpmap:8 PCMA / 8000
a = rtpmap:97 iLBC / 8000
m =视频51372 RTP / AVP 31 32
a = rtpmap:31 H261 / 90000
a = rtpmap:32 MPV / 90000
Johnston&Sparks信息性[第4页]
RFC 4317 SDP提供/回答示例2005年12月
[回答]
v = 0
o = bob 2808844564 2808844564输入IP4 host.biloxi.example.com
s =
c = IN IP4 host.biloxi.example.com
t = 0 0
m =音频49172 RTP / AVP 0 8
a = rtpmap:0 PCMU / 8000
a = rtpmap:8 PCMA / 8000
m =视频0 RTP / AVP 31
a = rtpmap:31 H261 / 90000
[第二优惠]
v = 0
o = alice 2890844526 2890844527 IN IP4 host.atlanta.example.com
s =
c = IN IP4 host.atlanta.example.com
t = 0 0
m =音频51372 RTP / AVP 0
a = rtpmap:0 PCMU / 8000
m =视频0 RTP / AVP 31
a = rtpmap:31 H261 / 90000
[第二答案]
v = 0
o = bob 2808844564 2808844565 IN IP4 host.biloxi.example.com
s =
c = IN IP4 host.biloxi.example.com
t = 0 0
m =音频49172 RTP / AVP 0
a = rtpmap:0 PCMU / 8000
m =视频0 RTP / AVP 31
a = rtpmap:31 H261 / 90000
2.3。音像3
爱丽丝提供三种音频和两种视频编解码器,而鲍勃则接受
单个音频和视频编解码器。经过这次交流,鲍勃
而爱丽丝(Alice)使用iLBC播放音频,使用H261播放视频。
注意:报价之间的动态有效载荷类型从97更改为99
并且答案是正确的,因为引用了相同的编解码器。