[Asterisk-Dev] Formats for storing Audio archives.

[Steven Critchfield]

On Mon, 2004-05-10 at 21:13, Adam Hart wrote:
> James Gardiner wrote:
> 
> > On the topic below..
> > Well, for storing the audio from a call, it does sound like a good idea to
> > keep each channel separate so a left/right (Caller/receiver) stereo mix
> > sounds like a great idea, especially if you need to really analyse one of
> > the channels audio for whatever reason.
> > However, if going to this level, a good compression with least drop in audio
> > quality is what your most likely looking for.
> > 
> > In terms of accessing the files, an archive would more likely be accessed
> > via WEB interface.  So standard audio compressions like MPEG audio OGG or
> > other free based hi quality methods would be ok.  Mainly as we want an audio
> > format readily available on any PC without having to use special player. (Ie
> > GSM is not supported out of the box from windows from my understanding.)
> > 
> > Considering all this, I was wondering if the list had any comments on this.
> > 
> > I wanted to discuss this application as I plan to implement all phone calls
> > in my company being archived.  I have had considerable problems with loosed
> > lipped employees and Intellectual property issues in our organisation with
> > use of our facilities for employees own gain.
> > 
> > Thanks,
> > James
> 
> 
> I'd say the easist way would be to store in wav and (assuming wav causes 
> storage issues), have a cron job to encode to mp3 every 5minutes (must 
> remember to only encode completed calls - look at timestamp of file). 
> You could even do this on another box if encoding of mp3 adds too much load.

timestamp wouldn't tell you if a file is currently being recorded.
Please learn the better tools of lsof(8).
-- 
Steven Critchfield <critch at basesys.com>