In the meanwhile you can try stream_delete() for all streams that you're
not interested in, then calling
https://opensips.org/html/docs/modules/3.3.x/sipmsgops.html#func_get_updated_body_part
to get the updated SDP and feed that to RTPEngine.
On 2/19/25 23:31, Pyle, Jeff wrote:
I asked the rtpengine-related part of this question on the rtpengine
list. Richard's response:
In the newer Kamailio module we have restructured the flags
parsing so that you can do
`rtpengine_offer("sdp-media-remove=[video message image]")` but
likely that change hasn't made it over to OpenSIPS yet.
Is his assumption correct? Does this make sense for a feature request
on the Github page?
Regards,
Jeff
------------------------------------------------------------------------
*From:* Users <users-boun...@lists.opensips.org> on behalf of Pyle,
Jeff <jp...@fusionconnect.com>
*Sent:* Wednesday, January 22, 2025 18:30
*To:* OpenSIPS Users <users@lists.opensips.org>
*Subject:* [OpenSIPS-Users] how to send a 'list' parameter to
rtpengine, or modify SDP in script before sending to rtpengine
Hello,
I'm on OpenSIPS 3.4.9 with rtpengine 13.1.1.6. I'm trying to make use
of the 'sdp-media-remove' command supported in this version of
rtpengine to remove unwanted media sessions from the SDP.
The author of rtpengine reminds me its syntax is
"sdp-media-remove" : ["<media-type>", "<media-type>", ...]
Or, in other words, this command requires a 'list' as its parameters.
The only way I could get rtpengine not to throw an error was by using
"sdp-media-remove=video". rtpengine shows this as
"sdp-media-remove": "video"
Based on the documentation, it needs to be
"sdp-media-remove" : ["video"]
How can one formulate an rtpengine_offer() command so that I can
provide a 'list'. In my case I want to preserve only the 'audio'
session, so, I need to write an rtpengine_offer() message with the
sdp-media-remove command that sends this:
"sdp-media-remove" : ["video", "text", "application", "message",
"other"]
Even better, is it possible to use standard OpenSIPS scripting
commands like stream_exists() and stream_delete() to remove the
streams from the SDP before sending to rtpengine? In my testing, these
commands don't have any effect on what rtpengine receives.
I have Cisco devices on my network that send an rtpmap payload of 255,
which rtpengine typically refuses to process because it's out of spec.
Removing the erroneous an unnecessary streams in OpenSIPS before
processing in rtpengine would solve this problem without having to
patch rtpengine.
Regards,
Jeff
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