[asterisk-users] Call recording format

[Vilius Adamkavicius]

Hi Joel,

We have a meetme on which we are landing two G.711 alaw calls, one coming
from TDM another from SIP. Once we those parties are in the conference we
are adding one more leg using Local channel and starting to record it.

Surely it would be logical if it would be less overhead recording alaw wav
since we are using alaw on both parties, but its not.

Thanks,
Vilius.

On 22 November 2010 14:19, Joel Maslak <jmaslak at antelope.net> wrote:

> What format are the actual calls in?  Are they in G.711u/a format or
> are they in something else (perhaps gsm?) format?  I'm asking to find
> out if Asterisk would need to transcode them.
>
> On Mon, Nov 22, 2010 at 6:47 AM, Vilius Adamkavicius
> <vilius.adamkavicius at invade.net> wrote:
> > Hi All,
> > We have a requirement to record over 60 simultaneous calls. Our recording
> > facilities are implemented using Monitor() over AMI. The thing we have
> > noticed that making 60 simultaneous call recordings using wav CPU load is
> > significantly higher (around 2 times more) than using gsm. Even writing
> call
> > recordings to /dev/null makes a big difference in CPU load.
> > What could be the reason for this? Is Asterisk updating wav headers every
> > time it writes?
> > What would be recommended hardware setup for over 60 simultaneous call
> > records?
> > Regards,
> > Vilius.
> >
> >
> >
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-- 
Vilius Adamkavicius
InVADE Technical Support


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