Hi everyone,

I got a strange problem with mod_conference and auto_outcall taking the

wrong codec for b-leg. For what I can see from the log everything seems

fine. The a-leg calls with the following SDP:

2012-09-18 08:57:47.410023 [DEBUG] sofia.c:6293 Remote SDP:

v=0

o=- 3556961565 3556961565 IN IP4 10.20.30.125

s=pjmedia

t=0 0

m=audio 4000 RTP/AVP 99 101

c=IN IP4 10.20.30.125

a=rtpmap:99 SILK/24000

a=fmtp:99 useinbandfec=0

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-15

a=rtcp:4001 IN IP4 10.20.30.125

And the SILK/24000 codec is accepted according to the log file:

2012-09-18 08:57:47.650018 [DEBUG] sofia_glue.c:3077 Set Codec

sofia/internal/1000004@10.20.30.240 SILK/24000 20 ms 480 samples 40000 bits

2012-09-18 08:57:47.650018 [DEBUG] switch_core_codec.c:111

sofia/internal/1000004@10.20.30.240 Original read codec set to SILK:120

2012-09-18 08:57:47.650018 [DEBUG] mod_sofia.c:836 Local SDP

sofia/internal/1000004@10.20.30.240:

v=0

o=FreeSWITCH 1347951445 1347951446 IN IP4 10.20.30.240

s=FreeSWITCH

c=IN IP4 10.20.30.240

t=0 0

m=audio 21622 RTP/AVP 99 101

a=rtpmap:99 SILK/24000

a=fmtp:99 useinbandfec=0; usedtx=0; maxaveragebitrate=40000

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-16

a=silenceSupp:off - - - -

a=ptime:20

a=sendrecv

The conference get's created and activates the read/write codecs for the

first member:

2012-09-18 08:57:47.990021 [DEBUG] mod_conference.c:7092 Raw Codec

Activation Success L16@24000hz 1 channel 20ms

2012-09-18 08:57:47.990021 [DEBUG] mod_conference.c:7137 Raw Codec

Activation Success L16@48000hz 1 channel 20ms

After that he's trying to do the auto_outcall and that's where things

get weird:

EXECUTE sofia/internal/1000004@freeswitch.aws.hosts.corpex.de

conference_set_auto_outcall(sofia/internal/sip:1000003@10.20.30.108:63741;transport=UDP;ob)

2012-09-18 08:57:47.990021 [NOTICE] switch_channel.c:951 New Channel

sofia/internal/sip:1000003@10.20.30.108:63741

[0236d005-1ff0-4f13-9370-bf7736087dd0]

2012-09-18 08:57:47.990021 [DEBUG] sofia_glue.c:2637 Local SDP:

v=0

o=FreeSWITCH 1347952749 1347952750 IN IP4 10.20.30.240

s=FreeSWITCH

c=IN IP4 10.20.30.240

t=0 0

m=audio 20318 RTP/AVP 98 0 8 101 13

a=rtpmap:98 SILK/8000

a=fmtp:98 useinbandfec=1; usedtx=0

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-16

a=ptime:20

a=sendrecv

2012-09-18 08:57:52.590016 [DEBUG] mod_conference.c:7092 Raw Codec

Activation Success L16@8000hz 1 channel 20ms

2012-09-18 08:57:52.590016 [DEBUG] mod_conference.c:7137 Raw Codec

Activation Success L16@48000hz 1 channel 20ms

Why is FS only offering SILK/8000 for b-leg? My outbound_codec_prefs is

configured like this:

outbound_codec_prefs=silk@24000,silk@16000,silk@8000,PCMU,PCMA,GSM

Thanks for your help,

Oliver

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