[Freeswitch-users] g729 sounds files - voicemail

[Brian West]

http://www.asteriskguru.com/tools/audio_conversion.php

/b

On Sep 20, 2008, at 11:45 AM, Gabriel Kuri wrote:

> Hi Lucas,
>
> I definitely don't want to get myself or the FS community into trouble
> for patent infringement. I'll look into the patent requirements for
> using g729 as I'm describing, although what is interesting is that
> asterisk already does this without charging a fee each time someone
> downloads asterisk. Currently, you can download asterisk and avail of
> their g729 sound files in pass through mode without paying any  
> licensing
> fees, although I'm not sure if they already paid the fees to Sipro  
> or it
> doesn't fall under the patent licensing since it's pass-through.
>
> Getting the sounds files into their respective format aside, you say  
> my
> plan sounds feasible, but I can't figure out how to tell FS to check  
> the
> codec in use and playback the sound file for the appropriate codec. So
> for example, someone dials in to check voicemail, and let's say  
> they're
> using G.726-32 and I had files encoded with G.726-32 in a folder
> 'sounds/voicemail/g726-32/', how do I tell FS to use those sounds  
> files
> based on the user's codec?
>
> Thanks,
>
> Gabriel Kuri
>
>
> Lucas Cornelisse wrote:
>> Hi Gabriel,
>>
>> The problem I see is that g729 is protected by very expensive  
>> patents.
>>
>> If FreeSWITCH were to encode their sound files in g729, they would
>> have to pay a base fee of at least 10 or 15 thousand dollars (that's
>> last time i
>> checked, and i don't recall if this is a yearly payment or not), plus
>> a smaller fee
>> for each file they encoded, and would likely have to pay an  
>> additional
>> fee each
>> time the files were downloaded.
>>
>> You may have to do the encoding yourself on this one...
>>
>> Once they are encoded, the plan sounds feasible.. I don't know the
>> status on
>> g729 in FreeSWITCH though.
>>
>> -lc
>>
>> On Fri, Sep 19, 2008 at 2:27 PM, Gabriel Kuri <gkuri at ieee.org
>> <mailto:gkuri at ieee.org>> wrote:
>>
>>    I've pretty much standardized on using g729 as the codec of  
>> choice for
>>    the users connecting to my FS installation, primarily due to the
>>    users I
>>    have that are on very slow connections and all of my carriers  
>> support
>>    g729, so no need to transcode.
>>
>>    The sounds files that comes with FS are raw PCM files. Since FS is
>>    unable to currently transcode to/from g729, is there any way to  
>> use
>>    sounds files that are in the g729 format, such that it is  
>> technically
>>    still "pass-through" on the FS side and no transcoding is  
>> required?
>>
>>    Ideally, I'm looking to install pre-coded g729 files for  
>> voicemail and
>>    have FS playback those files when someone logs into voicemail. I
>>    haven't
>>    tried simply replacing the files in the sounds directory, what I  
>> would
>>    prefer is to have a separate directory structure with g729 sound  
>> files
>>    and have FS detect the codec in use and automatically playback the
>>    files
>>    for the appropriate codec?
>>
>>    Thanks Much...
>>
>>    Gabriel Kuri
>>
>>
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