[Freeswitch-users] G729 ptime mismatch on ingress and egress legs
Ashwin Rath
ashwinrath at gmail.com
Mon Jun 10 16:39:05 MSD 2013
Thanks Steven
We eventually did manage to get the ptime thing working.
I am assuming since we do not "open" the G729 packet we do not attract any
licensing fee for packet repacking ?
On Fri, May 31, 2013 at 8:05 PM, Steve Underwood <steveu at coppice.org> wrote:
> 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
> >
> >
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> > Ashwin Kumar Rath
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> > --
> > Ashwin Kumar Rath
> >
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--
Ashwin Kumar Rath
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