[Freeswitch-users] Freeswitch transcoding even after Late Negotiation with inherit_codec

Shahnawaj Khan shahnawaj.khan1990 at gmail.com
Mon Sep 20 17:01:16 UTC 2021

Hi All,

I am working on a use case where we don't want freeswitch to transcode
and the codec negotiated with the B leg's answer should be passed to
the A leg so it also uses the same codec.
I have followed the following link
and added following flags in sip profiles
<param name="inbound-late-negotiation" value="true"/>
<param name="inherit_codec" value="true"/>
 But freeswitch is itself doing the transcoding. Scenario looks like
the following.

1) Bob---(Invite with OPUS,PCMU codec)---->Freeswitch
2) Freeswitch---(Invite with OPUS,PCMU codec)-->Alice
3) Alice ---(200 OK with PCMU)---> Freeswitch
4) Freeswitch---(200 OK with OPUS)--->Bob  //OPUS instead of PCMU

Please let me know if I have some understanding gaps and point me in
the right direction.

Thanks & Regards,

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