asterisk users - Mar 2011 - Converting MP3 files to wav for Asterisk

Hi,

I am running a service where I play full songs but MP3 files kept on
crashing my server. I resorted to wav but the quality is really poor
after converting..or even sometimes not audible at all! Do you guys
know of a better way I can convert mp3 to wav and restore quality?
Below is the script I am using, I also  tried the steps at
http://www.voip-info.org/wiki/view/Convert+WAV+audio+files+for+use+in+Asterisk
but it wasnt any better.

----------------------------
#!/bin/bash
for i in `ls $1/*mp3`
do
lame -a $i $i.wav
mplayer   -quiet  -vo null  -vc dummy  -ao
pcm:waveheader:file="$i.h.wav" $i.wav
sox $i.h.wav -t raw -r 8000 -s -2 -c 1 `echo $i|sed "s/.mp3/.sln/"`
done
-----------------------------

Any thoughts please?

Regards,
Tim

Try to convert into gsm instead wav.

sox test.wav -r 8000 -c1 test.gsm

Am 03.03.2011 06:20, schrieb Timothy Smith:
> Hi,
>
> I am running a service where I play full songs but MP3 files kept on
> crashing my server. I resorted to wav but the quality is really poor
> after converting..or even sometimes not audible at all! Do you guys
> know of a better way I can convert mp3 to wav and restore quality?
> Below is the script I am using, I also  tried the steps at
>
http://www.voip-info.org/wiki/view/Convert+WAV+audio+files+for+use+in+Asterisk
> but it wasnt any better.
>
> ----------------------------
> #!/bin/bash
> for i in `ls $1/*mp3`
> do
> lame -a $i $i.wav
> mplayer   -quiet  -vo null  -vc dummy  -ao
pcm:waveheader:file="$i.h.wav" $i.wav
> sox $i.h.wav -t raw -r 8000 -s -2 -c 1 `echo $i|sed
"s/.mp3/.sln/"`
> done
> -----------------------------
>
> Any thoughts please?
>
> Regards,
> Tim
>
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On Thu, 3 Mar 2011, Timothy Smith wrote:
> Do you guys know of a better way I can convert mp3 to wav and restore 
> quality?
You can't restore quality lost by converting to MP3. You shouldn't be 
'losing' quality by converting from MP3 to WAV.
> ----------------------------
> #!/bin/bash
> for i in `ls $1/*mp3`
Using "for i in $1/*mp3" will save creating a process.
> do
> lame -a $i $i.wav
Lame is an MP3 encoder. Specifying '.wav' doesn't create a WAV
encoded
file, just a 'single channel' (because of '-a') MP3 encoded file
with
'.wav' tacked on the end of the file name.
> mplayer   -quiet  -vo null  -vc dummy  -ao
pcm:waveheader:file="$i.h.wav" $i.wav
> sox $i.h.wav -t raw -r 8000 -s -2 -c 1 `echo $i|sed
"s/.mp3/.sln/"`
Using "sox $i.h.wav -t raw -r 8000 -s -2 -c 1 ${i%.mp3}.sln" will save
creating a process.
> done
> -----------------------------
I tried your commands converting an old Pink Floyd track and it sounded 
about as good as I would expect.

Try something 'simpler'

 	mpg123 -q -w "${TEMP}" "${INPUT}"
 	sox "${TEMP}" -c 1 -s -w -r 8000 "${OUTPUT}"

and see if that helps. Otherwise, how do the 'intermediate' files in
your
process sound? Can you hear when things fall apart?

If you post a link to a sample input file and a 'degraded' output file, 
this may provide more clues.

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