[Freeswitch-users] R: Sofia late-negotiation on re-INVITE(codec-modification)

Wed Dec 21 15:15:09 MSK 2011

Hi All,
I've some issue,
B send a re-invite changing the codec and fs hangup the call with 488 ,
Without reinvite a-legŠ.

Regards,
Alessandro

Da:  Visciano Giovanni <Giovanni.Visciano at italtel.it>
Risposta:  FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
Data:  Thu, 1 Dec 2011 16:35:54 +0100
A:  FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
Oggetto:  [Freeswitch-users] R: Sofia late-negotiation on
re-INVITE(codec-modification)

R: [Freeswitch-users] Sofia late-negotiation on
re-INVITE(codec-modification)
Finally we are back to our test.
I updated my FS installation to last GIT
(FreeSWITCH Version 1.0.head (git-eae86e0 2011-11-30 18-14-24 -0600))

TEST
----
SIP vs SIP basic audio call, then re-INVITE for codec modification.
FS configuration B2B, avoid transcoding.

CONF
----
In sofia SIP profile I have:
  <param name="inbound-late-negotiation" value="true"/>
  <param name="renegotiate-codec-on-reinvite" value="true"/>

and in my dialplan XML I hit:
  <action application="set" data="inherit_codec=true"/>

Loaded codec modules:
freeswitch at internal> show codec
type,name,ikey
codec,G.711 alaw,CORE_PCM_MODULE
codec,G.711 ulaw,CORE_PCM_MODULE
codec,G.729,mod_g729
codec,PROXY PASS-THROUGH,CORE_PCM_MODULE
codec,PROXY VIDEO PASS-THROUGH,CORE_PCM_MODULE
codec,RAW Signed Linear (16 bit),CORE_PCM_MODULE

TEST 1)
-------
1001  ----invite(pcma)----> FS --invite(pcma)-->  1000
1001  <----200OK(pcma)----  FS <--200OK(pcma)--   1000
1001  --re/invite(g729)---> FS
1001  <----488------------  FS

Full log: http://pastebin.freeswitch.org/17906

Note: FS does not negotiate end to end the reINVITE O/A codec modification.
It is closed locally on the 1001->FS leg. From the log I see
2011-12-01 15:54:13.871332 [DEBUG] sofia_glue.c:4767 Audio Codec Compare
[G729:18:8000:20:8000]/[PCMA:8:8000:20:64000]
2011-12-01 15:54:13.871332 [DEBUG] sofia_glue.c:4767 Audio Codec Compare
[telephone-event:101:8000:20:0]/[PCMA:8:8000:20:64000]
2011-12-01 15:54:13.871332 [ERR] sofia.c:5876 Reinvite Codec Error!

TEST 2)
-------
1000  ----invite(pcma)----> FS --invite(pcma)-->   1001
1000  <----200OK(pcma)----  FS <--200OK(pcma)--    1001
1000                        FS <--re/invite(g729)- 1001
1000                        FS ------------------> 1001

Full log: http://pastebin.freeswitch.org/17907

Note: FS does not negotiate end to end the reINVITE O/A codec modification.
It is closed locally on the 1001->FS leg. FS select locally G729 but this
result in transcoding!
I hate transcoding!
>From the log I see
2011-12-01 16:00:12.971244 [DEBUG] sofia_glue.c:4767 Audio Codec Compare
[G729:18:8000:20:8000]/[PCMA:8:8000:20:64000]
2011-12-01 16:00:12.971244 [DEBUG] sofia_glue.c:4767 Audio Codec Compare
[G729:18:8000:20:8000]/[G729:18:8000:20:8000]
2011-12-01 16:00:12.971244 [DEBUG] sofia_glue.c:2806 Changing Codec from
PCMA at 20ms@8000hz to G729 at 20ms@8000hz
2011-12-01 16:00:13.011337 [DEBUG] sofia_glue.c:2888 Set Codec
sofia/internal/1001 at 138.132.110.64:5070 G729/8000 20 ms 160 samples 8000
bits
2011-12-01 16:00:13.011337 [DEBUG] switch_core_codec.c:116
sofia/internal/1001 at 138.132.110.64:5070 Push codec G729:18
2011-12-01 16:00:13.031252 [ERR] mod_g729.c:102 This codec is only usable in
passthrough mode!
2011-12-01 16:00:13.031252 [ERR] switch_core_io.c:1077 Codec G.729 encoder
error!

Regard,
Giovanni

PS: next week I won't be at work. My collegue Nevio will follow
the problem, so if you need more data/details just tell us.

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