[Freeswitch-users] ILBC takes precedence regardless of the codec prefs

Emrah lists at kavun.ch
Wed Dec 12 01:02:09 MSK 2012


Hi all,

I am using FreeSWITCH Version 1.2.5.3+git~20121206T050429Z~91eef34d5c (git 91eef34 2012-12-06 05:04:29Z).
When mod_ilbc is loaded, ILBC is used in any session where the client offers it, regardless of my codec preferences. This gets even stranger when you look at the SIP trace… FS doesn't offer ILBC. This is brand new, I wanted to enable ILBC just in case, and found out that I prefer it to G729.

Here's some output of a trace:
Client:
v=0.
o=- 3564251257 3564251257 IN IP4 10.0.0.102.
s=pjmedia.
c=IN IP4 10.0.0.102.
t=0 0.
a=X-nat:0.
m=audio 4000 RTP/AVP 103 102 104 109 3 0 8 9 101.
a=rtcp:4001 IN IP4 10.0.1.132.
a=rtpmap:103 speex/16000.
a=rtpmap:102 speex/8000.
a=rtpmap:104 speex/32000.
a=rtpmap:109 iLBC/8000.
a=fmtp:109 mode=30.
a=rtpmap:3 GSM/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:9 G722/8000.
a=sendrecv.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.

FS:
v=0.
o=FreeSWITCH 1355242302 1355242303 IN IP4 1.2.3.4.
s=FreeSWITCH.
c=IN IP4 1.2.3.4.
t=0 0.
m=audio 20042 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=silenceSupp:off - - - -.
a=ptime:20.


Your input is greatly appreciated, as always.

All the best,
Emrah


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