asterisk users - Aug 2010 - Convert wav-file to alaw-file

Hello list,

it seems that Asterisk is unable to convert a wav-file into an alaw-file :

[root at asterisk testing]# asterisk -rx "file convert testExtended2.wav 
testExtended2.alaw"
Unable to open input file: testExtended2.wav
[root at asterisk testing]# asterisk -rx "file convert testLong2.wav 
testLong2.alaw"
Unable to open input file: testLong2.wav


The wav-file is MONO, 8000Hz according to SoX and confirmed by the sox 
mailinglist 
(http://sourceforge.net/mailarchive/message.php?msg_name=4C6A4661.9000209%40telenet.be)

[root at asterisk testing]# soxi testLong2.wav

Input File     : 'testLong2.wav'
Channels       : 1
Sample Rate    : 8000
Precision      : 16-bit
Duration       : 00:01:27.05 = 696427 samples ~ 6529 CDDA sectors
Sample Encoding: 16-bit Signed Integer PCM


Why then can I not use Asterisk to 'convert' to alaw ?!


Kind regards,

Jonas.
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On 8/17/2010 9:00 AM, Jonas Kellens wrote:
> Hello list,
>
> it seems that Asterisk is unable to convert a wav-file into an alaw-file :
>
> [root at asterisk testing]# asterisk -rx "file convert
testExtended2.wav
> testExtended2.alaw"
> Unable to open input file: testExtended2.wav
> [root at asterisk testing]# asterisk -rx "file convert testLong2.wav 
> testLong2.alaw"
> Unable to open input file: testLong2.wav
Try using an absolute path to the files:

     asterisk -rx "file convert /path/to/testExtended2.wav 
/path/to/textExtended2.alaw"

Sean
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From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Jonas Kellens
Subject: [asterisk-users] Convert wav-file to alaw-file

 
>Hello list,
>it seems that Asterisk is unable to convert a wav-file into an alaw-file :
>[root at asterisk testing]# asterisk -rx "file convert
testExtended2.wav
testExtended2.alaw"
>Unable to open input file: testExtended2.wav
>[root at asterisk testing]# asterisk -rx "file convert testLong2.wav
testLong2.alaw"
>Unable to open input file: testLong2.wav
>The wav-file is MONO, 8000Hz according to SoX and confirmed by the sox
mailinglist
>(http://sourceforge.net/mailarchive/message.php?msg_name=4C6A4661.9000209%4
0telenet.be)
>[root at asterisk testing]# soxi testLong2.wav
>Input File     : 'testLong2.wav'
>Channels       : 1
>Sample Rate    : 8000
>Precision      : 16-bit
>Duration       : 00:01:27.05 = 696427 samples ~ 6529 CDDA sectors
>Sample Encoding: 16-bit Signed Integer PCM
>Why then can I not use Asterisk to 'convert' to alaw ?!
>Kind regards,
>Jonas.
 

As I interpret what I have read in this forum over the last several months,
there is not really an "ALAW" format.  If you do a sox (don't
remember if
you can do in native Asterisk) convert to RAW (headerless) format,  Asterisk
is happy to consider that as ALAW.

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On 18/08/10 1:15 AM, Danny Nicholas wrote:
> As I interpret what I have read in this forum over the last several
> months, there is not really an ?ALAW? format. If you do a sox (don?t
> remember if you can do in native Asterisk) convert to RAW (headerless)
> format, Asterisk is happy to consider that as ALAW.
That would be signed linear (SLIN).

-- 
Cheers,

Matt Riddell
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