[asterisk-users] MoH - conversion command

[Eric Wieling]

In order to get the proper encoding for Asterisk, you must provide the 
correct values for each of these characteristics.  In your case, they 
are as follows:

    rate = 8000
    data size = 8-bit (byte)
    data encoding = gsm
    channels = 1 (mono)

Therefore, the command you would use to create your native MOH files is:

    sox in.wav -t gsm -r 8000 -b -c 1 out.gsm

As G729 is a patented codec and so not available in Free Software, you'll have to figure out how to translate those values for whatever software you are using to create G729 files.

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of Bryant Zimmerman
> Sent: Thursday, July 28, 2011 3:44 PM
> To: bryantz at zktech.com; Asterisk Users Mailing List - Non-Commercial
> Discussion
> Subject: Re: [asterisk-users] MoH - conversion command
> 
> 
> 
> ________________________________
> 
> From: "Mike" <list at net-wall.com>
> Sent: Thursday, July 28, 2011 1:29 PM
> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-
> users at lists.digium.com>
> Subject: Re: [asterisk-users] MoH - conversion command
> 
> >
> > > I should have said I am trying this both from a landline using ulaw,
> > > and from a Polycom phone using g729 codec. G729 is noticeablty
> > > worst, as you`d expect, maybe this is what is reported by my customers.
> > >
> > > Is there any way to have a "decent" g729 file, or should I just give
> > > up and change everyone to ulaw ?
> >
> > G.729 is a *speech* codec, and as such it does not handle non-speech
> > (music, tones, etc.) very well at all.
> >
> 
> Hi Kevin,
> 
> I understand that perfectly, I was just wondering if there was a "less bad"
> way of converting music to g729 format so people find the quality bad, but
> don`t feel like cutting their ears off.
> 
> Regards,
> 
> Mike
> 
> 
> 
> Kevin
> 
> I have used the asterisk cli to do my conversion to g729. I have gotten the
> best results there.
> 
> cli   file convert in_file out_file
> asterisk -x "file convert in_file  out_file"
> 
> 
> Thanks
> 
> Bryant Zimmerman (ZK Tech Inc.)