<p>Case of ongoing audio call between UA1 and UA2 registered to different opensips O1 and O2. Mediaproxy is started at O1 UA1. Call is going fine, UA1 sends a re-invite for video, O2 receives request from O1 to relay to UA2 but chops off a portion of the sdp containing the video port before sending it. Note the m=video line.</p>
<p>This is trace the on O2</p>
<p>U 2015/09/24 03:26:25.751577 O1:5060 -> O2:5060<br>
INVITE sip:19995678540@55.456.34.4:5073 SIP/2.0.<br>
Record-Route: sip:19995678540@O1:5060;ftag=aBAabhRx-;lr.<br>
Via: SIP/2.0/UDP O1:5060;branch=z9hG4bK9293.6ddeddf3.0.<br>
Via: SIP/2.0/UDP 172.16.0.18:5060;received=55.456.34.4;branch=z9hG4bK.xKjWy3C~v;rport=5060.<br>
From: sip:19995675342@mydomain.net;tag=aBAabhRx-.<br>
To: "csip" sip:19995678540@mydomain.net;tag=3m6-QAR.<br>
CSeq: 22 INVITE.<br>
Call-ID: 08syb7keM5.<br>
Max-Forwards: 69.<br>
Route: sip:19995678540@O2:5060;ftag=aBAabhRx-;lr;did=da4.12eea932.<br>
Subject: Media change.<br>
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE.<br>
Content-Type: application/sdp.<br>
Content-Length: 397.<br>
Contact: sip:19995675342@55.456.34.4;+sip.instance="urn:uuid:457d1d6f-96a1-4e67-b2c0-9c1c50d6a5ab".<br>
User-Agent: Linphone/3.8.5 (belle-sip/1.4.1).<br>
Proxy-Authorization: Digest realm="mydomain.net", nonce="56036d7900000001c89041633e412550979448da344e29d2", username="19995675342", uri="sip:19995678540@55.456.34.4:5073", response="c6242475e3b3e6cc886bba1c93f0c73d".<br>
.<br>
v=0.<br>
o=19995675342 3223 2488 IN IP4 55.456.34.4.<br>
s=Talk.<br>
c=IN IP4 199.999.999.812.<br>
t=0 0.<br>
a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics.<br>
m=audio 21238 RTP/AVP 96 0 101 97.<br>
a=rtpmap:96 opus/48000/2.<br>
a=fmtp:96 useinbandfec=1; stereo=0; sprop-stereo=0.<br>
a=rtpmap:101 telephone-event/48000.<br>
a=rtpmap:97 telephone-event/8000.<br>
m=video 21242 RTP/AVP 96.<br>
a=rtpmap:96 VP8/90000.</p>
<p>U 2015/09/24 03:26:25.752492 O2:5060 -> O1:5060<br>
SIP/2.0 100 Giving a try.<br>
Via: SIP/2.0/UDP O1:5060;branch=z9hG4bK9293.6ddeddf3.0.<br>
Via: SIP/2.0/UDP 172.16.0.18:5060;received=55.456.34.4;branch=z9hG4bK.xKjWy3C~v;rport=5060.<br>
From: sip:19995675342@mydomain.net;tag=aBAabhRx-.<br>
To: "csip" sip:19995678540@mydomain.net;tag=3m6-QAR.<br>
CSeq: 22 INVITE.<br>
Call-ID: 08syb7keM5.<br>
Server: OpenSIPS (2.1.1 (x86_64/linux)).<br>
Content-Length: 0.<br>
.</p>
<p>U 2015/09/24 03:26:25.752579 O2:5060 -> 55.456.34.4:5073<br>
INVITE sip:19995678540@55.456.34.4:5073 SIP/2.0.<br>
Record-Route: sip:19995678540@O2:5060;ftag=aBAabhRx-;lr.<br>
Record-Route: sip:19995678540@O1:5060;ftag=aBAabhRx-;lr.<br>
Via: SIP/2.0/UDP O2:5060;branch=z9hG4bK9293.a7c918e.0.<br>
Via: SIP/2.0/UDP O1:5060;branch=z9hG4bK9293.6ddeddf3.0.<br>
Via: SIP/2.0/UDP 172.16.0.18:5060;received=55.456.34.4;branch=z9hG4bK.xKjWy3C~v;rport=5060.<br>
From: sip:19995675342@mydomain.net;tag=aBAabhRx-.<br>
To: "csip" sip:19995678540@mydomain.net;tag=3m6-QAR.<br>
CSeq: 22 INVITE.<br>
Call-ID: 08syb7keM5.<br>
Max-Forwards: 68.<br>
Subject: Media change.<br>
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE.<br>
Content-Type: application/sdp.<br>
Content-Length: 397.<br>
Contact: sip:19995675342@55.456.34.4;+sip.instance="urn:uuid:457d1d6f-96a1-4e67-b2c0-9c1c50d6a5ab".<br>
User-Agent: Linphone/3.8.5 (belle-sip/1.4.1).<br>
Proxy-Authorization: Digest realm="mydomain.net", nonce="56036d7900000001c89041633e412550979448da344e29d2", username="19995675342", uri="sip:19995678540@55.456.34.4:5073", response="c6242475e3b3e6cc886bba1c93f0c73d".<br>
.<br>
v=0.<br>
o=19995675342 3223 2488 IN IP4 55.456.34.4.<br>
s=Talk.<br>
c=IN IP4 199.999.999.812.<br>
t=0 0.<br>
a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics.<br>
m=audio 21238 RTP/AVP 96 0 101 97.<br>
a=rtpmap:96 opus/48000/2.<br>
a=fmtp:96 useinbandfec=1; stereo=0; sprop-stereo=0.<br>
a=rtpmap:101 telephone-event/48000.<br>
a=rtpmap:97 telephone-event/8000.<br>
m=vi</p>
<p>U 2015/09/24 03:26:25.966969 55.456.34.4:5073 -> O2:5060<br>
SIP/2.0 100 Trying.<br>
Via: SIP/2.0/UDP O2:5060;branch=z9hG4bK9293.a7c918e.0.<br>
Via: SIP/2.0/UDP O1:5060;branch=z9hG4bK9293.6ddeddf3.0.<br>
Via: SIP/2.0/UDP 172.16.0.18:5060;received=55.456.34.4;branch=z9hG4bK.xKjWy3C~v;rport=5060.<br>
From: sip:19995675342@mydomain.net;tag=aBAabhRx-.<br>
To: "csip" sip:19995678540@mydomain.net;tag=3m6-QAR.<br>
Call-ID: 08syb7keM5.<br>
CSeq: 22 INVITE.<br>
.</p>
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