[Freeswitch-users] Optimum sound file format

[Nik Middleton]

Thanks for this.  One of the servers is using sata and the other scsii
drives, so that may be the problem, I'll give it a go.  Problem seems to
escalate past 200 active calls.  Below that all is well.

 

That said, it could also be a db issue, so I've changed my log tables to
innodb (I'm hoping that now I have row level locking as opposed to table
level it will help)

 

Regards,

 

________________________________

From: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of
Anthony Minessale
Sent: 16 April 2009 23:25
To: freeswitch-users at lists.freeswitch.org
Subject: Re: [Freeswitch-users] Optimum sound file format

 

Looking at your post, You are already using the best format.
If you do not have a fast filesystem try making a ram disk and play the
files from there instead.

if you *really* want you can use sox to turn them all into raw alaw
files and rename them with a .PCMA extension
to avoid the g711 transconding but g711 to PCM is pretty trivial. it's
more likely a file i/o distress you see.



On Thu, Apr 16, 2009 at 5:04 PM, Nik Middleton
<nik.middleton at noblesolutions.co.uk> wrote:

Hi Guys,

 

I'm looking for the optimum audio format when using streamfile in a lua
script.

 

I've found CPU load increases rapidly with the number of threads playing
a .wav file.  Can anyone tell me the optimum when using g711a?

 

Right now the the .wav files are 

 

Audio format: PCM

Sample rate : 8 kHz

Mono

Sample Size: 16 bit

Bit rate          :128kbps

 

Will it help CPU load if I resample to a bit rate of 64kbps and sample
size of 8 bit?

 

I have read that the sample size needs to be 13-14bit  +1 for alaw/ulaw
though

 

Regards,


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