[Asterisk-Users] MP3 or OGG

[Waldo Rubinstein]

Hilton,

AFAIK, you can optionally record in gsm. However, I think * won't do  
it natively. It will do -in and -out wav files, soxmix them together  
and then convert them to gsm. I'm offloading all of that to a  
different machine and just leaving * to create the raw -in and -out  
wav files.

Maybe I'm wrong too, so comments are welcomed.

Thanks,
Waldo

On Nov 8, 2005, at 3:14 AM, Quark IT - Hilton Travis wrote:

> Hi Waldo,
>
> Doesn't * record to .gsm file initially and then convert these to .wav
> later?  I may be totally off the mark here, and if I am, I welcome the
> correction.
>
> In that case, why not leave the files in .gsm format instead of
> translating them into another lossy format?  Obviously if * records
> conversations as .wav files then I'd be leaning toward Speex  
> (Vorbis) as
> it is a "suited to speech" compression format.
>
> Both Speex and ogg are Open Source, therefore patent issues are likely
> non-existent.  MP3, otoh, is fine if you use one of their approved  
> apps,
> and not if you use anything else.  I'm steering clear of .mp3 (and  
> have
> been for quite a few years now).
>
> --
>
> Regards,
>
> Hilton Travis                          Phone: +61 (0)7 3344 3889
> (Brisbane, Australia)                  Phone: +61 (0)419 792 394
> Manager, Quark IT                      http://www.quarkit.com.au
>          Quark Group                   http://quarkgroup.com.au/
>
> Microsoft Small Business Specialists
>
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>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com
>> [mailto:asterisk-users-bounces at lists.digium.com]
>> On Behalf Of Waldo Rubinstein
>> Sent: Tuesday, 8 November 2005 11:32
>>
>> Wasn't aware of it, but if quality is good, it makes sense
>> since all I'm archiving is speech.
>>
>> Will evaluate further.
>>
>> Thanks,
>> Waldo
>>
>> On Nov 7, 2005, at 7:14 PM, Mark Edwards wrote:
>>
>>> I would recommend vorbis speex for this.
>>> You can get windows drivers to read speex files directly.
>>>
>>> Vorbis are the same bunch that develops ogg.
>>>
>>> Ogg and mp3 are more suited to music rather than speech.
>>> Speex is a much better fit for speech archiving.
>>>
>>> Mark
>>>
>>>
>>> -----Original Message-----
>>> From: BJ Weschke [mailto:bweschke at gmail.com]
>>> Sent: Tuesday, 8 November 2005 5:52 AM
>>>
>>> You're probably not going to be violating any patent
>>> protections by using OGG instead of MP3. As far as
>>> compression goes, I've found the difference between
>>> the two of them to be negligible. I've always used
>>> OGG when possible to stay "IP safe".
>>>
>>> On 11/7/05, Waldo Rubinstein <waldo at trianet.net> wrote:
>>>> I'm trying to archive out call recordings and would
>>>> appreciate some feedback as to which audio compression is
>>>> more recommended MP3 or OGG. In the past, I've use lame
>>>> to convert to MP3, but I noticed the audio volume drops
>>>> significantly. Is it just a setting on the command line
>>>> of lame or is OGG better? Which achieves higher
>>>> compression rates while maintaining call quality?
>>>>
>>>> Thanks,
>>>> Waldo
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