[OpenSIPS-Users] SDP problem

[Simon Gajski]

Hi

rtpengine_manage("RTP/AVP replace-session-connection");

did the trick

Thank you

BR
Simon


Tito Cumpen je 15.11.2024 ob 16:43 napisal:
> Simon,
>
> It's possible that RTPengine is replacing both payload specific and 
> session level c lines. Does your downstream SDP contain a session 
> level c line ? From the documentation it sounds like rtpengine might 
> be introducing one.
>
>
>
>
> On Fri, Nov 15, 2024, 4:18 AM Simon Gajski via Users 
> <users at lists.opensips.org> wrote:
>
>     Hi
>
>     We are doing a SIP interconnection with one of carriers that sends
>     us Invite with SDP where "c=IN" parameter is defined twice.
>     v=0 o=- 33593 33593 IN IP4 172.29.1.2 s=- *c=IN IP4 172.29.3.4*t=0
>     0 a=sendrecv m=audio 36440 RTP/AVP 8 18 96*c=IN IP4
>     172.29.3.4*b=RR:0 b=RS:0 a=rtpmap:8 PCMA/8000 a=rtpmap:18
>     G729/8000 a=fmtp:18 annexb=yes a=rtpmap:96 telephone-event/8000
>     a=fmtp:96 0-15 a=maxptime:40
>
>
>     We are using opensips 3.4.2 with rtpengine 10.5.0.0 to act as SBC
>     Problem is that when opensips  forwards such INVITE to next hop,
>     rtpengine changes accordinly only second line of 'c' parameter,
>     resulting in no media.
>
>     I never ran into duplicate line of 'c' param in SDP.
>
>     My question: Is it possible to remove one of duplicated lines
>     before rtpengine handles it or if anyone knows how to process both
>     lines in rtpengine?
>     Carrier is one of national telcos and won't remove it. So I need
>     to figure out how to solve it on our side.
>
>     Thank you for any tip
>
>     BR
>     Simon
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