[asterisk-users] sox: Failed reading obd-demo.mp3: Do not understand format type: mp3

[Danny Nicholas]

+1 (at least) Steve

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Steve Edwards
Sent: Thursday, September 15, 2011 3:07 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] sox: Failed reading obd-demo.mp3: Do not
understand format type: mp3

On Thu, 15 Sep 2011, Kaushal Shriyan wrote:

> I did ran the below command
>
> [root at host0040 test]# file obd-demo.alaw
> obd-demo.alaw: data
>
> [root at host0040 test]# sox obd-demo.alaw -e stat
> sox: Failed reading obd-demo.alaw:
> Do not understand format type: alaw

[au]law are 'headerless' file formats so the 'file' command can't help. 
Sox needs a clue as well. (See what sox says if you change the file name
from example.alaw to example.al.)

> Basically trying to understand the properties of the .alaw file about 
> encoding and details. Please guide.

Personally, I prefer to use WAV (not the funky 'gsm in wav' kind) files
throughout.

I don't think 'transcoding' between [au]law and wav is a big deal CPU wise
and I like easy to use file formats.

Call me lazy, but being able to just type 'play example.wav' or 'audacity
example.wav' has value to me. So does being able to email an audio file to a
'non-techie' and not having to explain anything.

If you're looking to squeeze every last CPU cycle, there are probably better
places to look. If you are really that tight on resources, maybe you should
reconsider your hardware choices.

--
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards       sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline                                              Fax: +1-760-731-3000

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