[Freeswitch-users] G729 ptime mismatch on ingress and egress legs

[Steve Underwood]

Hi,

The Sangoma G.729 is a transcoder. You don't want that for ptime 
resolution. Decompressing and recompressing really hurts the quality. FS 
will repack the frames to resolve ptime mismatches, although the latency 
is better if you can avoid such repacking.

Steve


On 05/31/2013 09:23 PM, Ashwin Rath wrote:
> Hi Steven
>
> Yes we have tried the passthru_ptime_mismatch set to true but that 
> didnt solve the purpose. So we decided to try sangoma. Trouble is FS 
> uses the sangoma even in case of passthrough. Is there something that 
> can be done to use mod_G729 for passthrough and sangoma g729 for ptime 
> mismatch ?
>
>
> On Fri, May 31, 2013 at 5:55 PM, Steven Ayre <steveayre at gmail.com 
> <mailto:steveayre at gmail.com>> wrote:
>
>     First have you tried passthru_ptime_mismatch=true yet? It's not
>     the default used by the passthrough mod_g729 codec.
>
>     Only one module can be loaded at a time to provide a given codec
>     (ie mod_g729 or mod_com_g729 or mod_sangoma_codec). Internally
>     perhaps the sangoma module would avoid licenses, but they would
>     need to clarify. AFAIK mod_com_g729 only uses a license when
>     required, simple 729-729 bridges still use passthrough, but I
>     don't know how ptime affects that. It's be easy to test though -
>     load it without any licenses and try a 729-729 call with differing
>     primes and see it the call gets through.
>
>     -Steve
>
>
>
>     On Friday, May 31, 2013, Ashwin Rath wrote:
>
>         Thanks Anthony ,
>
>         Looks like we would need to purchase a G729 license for
>         Freeswitch or use a Sangoma card. Is there some configuration
>         which tells Freeswitch to use the card ( or the software codec
>         ) only in case of a ptime mismatch  so that we could save on
>         the licensing fee only for calls that actually need ptime
>         conversion ?
>
>
>         On Tue, May 28, 2013 at 8:21 PM, Anthony Minessale
>         <anthony.minessale at gmail.com> wrote:
>
>             Set the variable passthru_ptime_mismatch=true on both legs
>             of the call.  That's the best we can do.  If that doesn't
>             work you'll need licenses.
>
>
>
>
>             On Tue, May 28, 2013 at 9:12 AM, Ashwin Rath
>             <ashwinrath at gmail.com> wrote:
>
>                 Hi
>
>                 I am trying to configure FS as a B2BUA which can do
>                 ptime conversions between the ingress and egress leg.
>
>                 The question is, if both legs have G729 as the codec
>                 but ptime 20 on one and 30 on another, would i still
>                 need to get the licensed mod_com_g729 or can it work
>                 with the passthrough mod_g729. I already tried it out,
>                 but it doesnt seem to work.
>
>                 Is there some configuration needed for this ?
>
>                 -- 
>                 Thegrid
>
>                 _________________________________________________________________________
>                 Professional FreeSWITCH Consulting Services:
>                 consulting at freeswitch.org
>                 http://www.freeswitchsolutions.com
>
>                 FreeSWITCH-powered IP PBX: The CudaTel Communication
>                 Server
>                 
>
>                 Official FreeSWITCH Sites
>                 http://www.freeswitch.org
>                 http://wiki.freeswitch.org
>                 http://www.cluecon.com
>
>                 FreeSWITCH-users mailing list
>                 FreeSWITCH-users at lists.freeswitch.org
>                 http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>                 UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>                 http://www.freeswitch.org
>
>
>
>
>             -- 
>             Anthony Minessale II
>
>             FreeSWITCH http://www.freeswitch.org/
>             ClueCon http://www.cluecon.com/
>             Twitter: http://twitter.com/FreeSWITCH_wire
>
>             AIM: anthm
>             MSN:anthony_minessale at hotmail.com
>             GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>             IRC: irc.freenode.net <http://irc.freenode.net> #freeswitch
>
>             FreeSWITCH Developer Conference
>             sip:888 at conference.freeswitch.org
>             googletalk:conf+888 at conference.freeswitch.org
>             pstn:+19193869900
>
>             _________________________________________________________________________
>             Professional FreeSWITCH Consulting Services:
>             consulting at freeswitch.org
>             http://www.freeswitchsolutions.com
>
>             
>             
>
>             Official FreeSWITCH Sites
>             http://www.freeswitch.org
>             http://wiki.freeswitch.org
>
>         Ashwin Kumar Rath
>
>
>     _________________________________________________________________________
>     Professional FreeSWITCH Consulting Services:
>     consulting at freeswitch.org <mailto:consulting at freeswitch.org>
>     http://www.freeswitchsolutions.com
>
>     
>     
>
>     Official FreeSWITCH Sites
>     http://www.freeswitch.org
>     http://wiki.freeswitch.org
>     http://www.cluecon.com
>
>     FreeSWITCH-users mailing list
>     FreeSWITCH-users at lists.freeswitch.org
>     <mailto:FreeSWITCH-users at lists.freeswitch.org>
>     http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>     UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>     http://www.freeswitch.org
>
>
>
>
> -- 
> Ashwin Kumar Rath
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org