[Freeswitch-users] G.729 Media Pass-Thru

[Steven Ayre]

The cdrs will tell you which codecs are used inbound and outbound. If they're the same transcoding won't happen (probably*).

If you're using mod_g729 transcoding can't happen. If you're using mod_com_g729 it can.

* unless you're doing more than bridging eg eavesdropping, recording, playback etc

Steve on iPhone

On 14 Sep 2010, at 16:34, Tim King <tim at compnetwork.net> wrote:

> What command can I use to see if trans coding is happening? I am generating the calls from winsip and passing them to free switch which is sending them to a SIPp instance that is just echoing back the rtp stream.
> 
> On Tue, Sep 14, 2010 at 11:08 AM, Mathieu Rene <mrene_lists at avgs.ca> wrote:
> Transcoding will only happen if it has to, if the codecs are the same on both channels (same type, ptime and sample rate), FreeSWITCH will just pass the audio frame without touching it. If you see transcoding happening, chances are one of those variable isn't matching.
> 
> Mathieu Rene
> Avant-Garde Solutions Inc
> Office: + 1 (514) 664-1044 x100
> Cell: +1 (514) 664-1044 x200
> mrene at avgs.ca
> 
> 
> 
> 
> On 2010-09-14, at 10:40 AM, Steven Ayre wrote:
> 
>> Tim - are you using mod_g729 or mod_com_g729?
>> 
>> -Steve
>> 
>> 
>> On 14 September 2010 15:32, David Ponzone <david.ponzone at ipeva.fr> wrote:
>> Tim,
>> 
>> I dont think there is any proper G729 pass-through configuration.
>> If a call is G729-passthrough, it should have (AFAIK) the same CPU-footstep than G711.
>> 
>> Do you have G729 licenses on the host ?
>> If yes, are you sure they are not used ?
>> Have your checked your logs for any transcoding issues ?
>> (grep ERR freeswitch.log | grep -i transcod)
>> 
>> 
>> David Ponzone  Direction Technique
>> email: david.ponzone at ipeva.fr
>> tel:      01 74 03 18 97
>> gsm:   06 66 98 76 34
>> 
>> Service Client IPeva
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>> 
>> 
>> 
>> 
>> Le 14/09/2010 à 16:07, Tim King a écrit :
>> 
>>> Can someone help point me toward proper configuration of G.729 pass through. I have a system with Dual Quad Core Xeons. It will hold up 1000 G.711u calls no problem with cpus 80% idle, however if I switch to G.729 I spike the cpu's at around 400 calls.
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> 
> (same type, ptime and sample rate), FreeSWITCH will just pa=
> ss
>> the audio frame without touching it. If you see transcoding happening,
>> chances are one of those variable isn't matching.
>> 
>> Mathieu Rene
>> Avant-Garde Solutions Inc
>> Office: + 1 (514) 664-1044 x100
>> Cell: +1 (514
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