[OpenSIPS-Users] RTPEngine - changing codec format parameters from default values when transcoding - OpenSIPS 3.1

Johan De Clercq Johan at democon.be
Tue Sep 14 12:58:14 EST 2021

Follow the rtpengine documentation. The necessary flags are given there,
just pass them in an avp to rtpengine_offer or answer

On Tue, Sep 14, 2021, 14:55 Mark Allen <mark at allenclan.co.uk> wrote:

> Hi Răzvan
> OpenSIPS passes the commands to RTPengine as you supply them, so in
>> theory this should be supported. Did you try to set this up? Can you
>> provide any logs about this?
> No. I'm not sure how I would specify this in the opensips.cfg
> rtpengine_offer parameters. From the documentation for the
> rptengine OpenSIPS module, it doesn't seem as if something like the
> following is an option...
> transcode-opus='opus/48000/2/32000//maxplaybackrate=48000;stereo=0;useinbandfec=1;maxaveragebitrate=32000
> '
> ...however, if I have tried this in the code (with or without quotes) it
> doesn't produce an error, either from OpenSIPS or rtpengine, but neither
> does it do anything - Opus fmtp in the SDP is not changed. I guess I'm
> looking for the correct OpenSIPS syntax to pass these parameters
> successfully to rtpengine
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