Re: [EXTERNAL] Per-branch SDP modification (strip video) in parallel forking

On 09/04/2026 10.54, e.titovets--- via sr-users wrote:
> 3. Using rtpengine:
> According to rtpengine NG protocol, "offer" supports:
>    "sdp-media-remove": ["video"]
> However, I cannot find a way to pass this parameter via Kamailio's rtpengine module.
> Tried to add flag sdp-media-remove=video to the rtpengine_manage() but it doesn't work.
>
> Environment:
> - Kamailio version: 6.0.6
> - rtpengine version: 13.5.1.6

You can enable debug logging on rtpengine and see what it has to say 
about what it receives from Kamailio when you do this.

In general: With these versions, you should be able to use the 
"extended" 2-argument syntax for rtpengine_offer/_answer/_manage, by 
putting the branch value (which you need anyway) as second argument, 
which allows you to use this syntax directly, for example:

rtpengine_manage("replace-origin RTP/AVP ... sdp-media-remove=[video]", "auto-next");

"auto-next" is to use the generated branch value in a branch route, and 
to use the value from the header in a response. Depending on your 
scenario and config you may have to use different values (rtpengine must 
be able to match an answer to the corresponding branched offer).

Cheers

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