How should i get the ssrc when generate offer/answer SDP ?

[yingzhuo1314]

Hello,
I faced a problem when using openwebrtc-ios-sdk.The follow is offer SDP I fetched ,it doesn't include ssrc .How should i get the ssrc ?? Anyone can help me ? urgent...

Thanks very much.

{
sdp = "v=0
\no=- 1463041769747409200 1 IN IP4 127.0.0.1
\ns=-
\nt=0 0
\nm=video 9 UDP/TLS/RTP/SAVPF 103 100 120
\nc=IN IP4 0.0.0.0
\na=rtcp-mux
\na=sendrecv
\na=rtpmap:103 H264/90000
\na=rtpmap:100 VP8/90000
\na=rtpmap:120 RTX/90000
\na=fmtp:103 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f
\na=fmtp:120 apt=100;rtx-time=200
\na=rtcp-fb:100 nack
\na=rtcp-fb:103 nack pli
\na=rtcp-fb:100 nack pli
\na=rtcp-fb:103 ccm fir
\na=rtcp-fb:100 ccm fir
\na=ice-ufrag:RGMq
\na=ice-pwd:0E/NcMGGgEEFcMFA3KODII
\na=candidate:1 1 UDP 2013266431 192.168.4.133 61743 typ host
\na=candidate:2 1 TCP 1019216383 192.168.4.133 0 typ host tcptype active
\na=candidate:3 1 TCP 1015022079 192.168.4.133 54754 typ host tcptype passive
\na=candidate:4 1 UDP 2013266431 10.239.56.194 55953 typ host
\na=candidate:5 1 TCP 1019216383 10.239.56.194 0 typ host tcptype active
\na=candidate:6 1 TCP 1015022079 10.239.56.194 54755 typ host tcptype passive
\na=fingerprint:sha-256 96:23:BA:A7:70:F3:81:43:97:BE:3E:E8:6D:9F:78:A0:4E:18:F5:40:3A:D2:9A:3C:DB:6B:19:86:0D:B5:B4:B2
\na=setup:actpass
\nm=audio 9 UDP/TLS/RTP/SAVPF 111 8 0
\nc=IN IP4 0.0.0.0
\na=rtcp-mux
\na=sendrecv
\na=rtpmap:111 OPUS/48000/2
\na=rtpmap:8 PCMA/8000
\na=rtpmap:0 PCMU/8000
\na=ice-ufrag:MH/H
\na=ice-pwd:cPI3jP0rSAjY7WI8vdhFFU
\na=candidate:7 1 UDP 2013266431 192.168.4.133 50360 typ host
\na=candidate:8 1 TCP 1019216383 192.168.4.133 0 typ host tcptype active
\na=candidate:9 1 TCP 1015022079 192.168.4.133 54756 typ host tcptype passive
\na=candidate:10 1 UDP 2013266431 10.239.56.194 56787 typ host
\na=candidate:11 1 TCP 1019216383 10.239.56.194 0 typ host tcptype active
\na=candidate:12 1 TCP 1015022079 10.239.56.194 54757 typ host tcptype passive
\na=fingerprint:sha-256 96:23:BA:A7:70:F3:81:43:97:BE:3E:E8:6D:9F:78:A0:4E:18:F5:40:3A:D2:9A:3C:DB:6B:19:86:0D:B5:B4:B2
\na=setup:actpass
\n";
type = offer;
}

[yingzhuo1314]

By g_object_get(media_session, "ssrc",&"media_ssrc", nil);, i get the ssrc number ,but i recieved a warning -"(:638): GLib-GObject-WARNING **: g_object_get_valist: object class 'OwrMediaSession' has no property named 'ssrc' "-and the offer SDP i fetched is still not include ssrc.
What should i do ??