[Freeswitch-users] webrtc: [ERR] mod_sofia.c:2299 CODEC NEGOTIATION ERROR. SDP

Quan Huo Sheng quanhs at stee.stengg.com
Tue Apr 5 06:32:33 MSD 2016

Hi All;

I want to use freeswitch to set up a WebRTC POC (Audio only, udp/tls/rtp/savp).  Setup is Anonymous ( ->freeswitch ( ->1010 (,just following the information in book "FreeSWITCH 1.6 Cookbook".
If using media bypass mode (inbound-bypass-media == true), all works fine, caller and called can hear each other.
But if disabling media bypass mode, call is rejected by FS.

FS log shows "[ERR] mod_sofia.c:2299 CODEC NEGOTIATION ERROR. SDP". Attachment is detailed FS log file.
Chrome uses opus 111, FS uses opus 116.
Mod_sofia.c::sofia_receive_message() --> sofia_media.c::sofia_media_negotiate_sdp() --> sofia_core_media.c::sofia_core_media_negotiate_sdp().

Help is needed to troubleshoot this issue.

Thanks advance.

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