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

Răzvan Crainea razvan at opensips.org
Tue Sep 14 13:20:48 EST 2021

I think the proper way to do it is 
Anyway, as Johan suggests, follow the rtpengine documentation, you will 
find more info there.

Best regards,

Răzvan Crainea
OpenSIPS Core Developer

On 9/14/21 15:51, Mark Allen 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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