[asterisk-users] mixmonitor extension

[Marek Cervenka]

for the record. info about opus from Lorenzo Mniero (author of Opus 
patch for asterisk) with his permission

--cite--
Opus is just a codec. In order to save an audio file using Opus, you
need a container, which for Opus is OGG. Asterisk supports OGG, but I
think it is implemented to only dump Vorbis audio, and so the existing
module would need to be extended to support Opus as well.

I haven't checked how complex this could be, to be honest, so I have
no idea about how much effort would be needed for this. Right now we
don't need it, so I really can't say if and when we'll start working
on this.

Lorenzo
--cite--

Dne 24.1.2014 10:42, Gareth Blades napsal(a):
> On 23/01/14 23:37, Marek Cervenka wrote:
>> can someone confirm that mp3 is unsupported? is patch available?
>>
>> what about patch for Opus?
>>
>> uncle google doesnt know 
>
> MP3 is only supported for reading not writing. Its a patent issue as 
> Asterisk cannot distribute the software to write to mp3 under its own 
> license.
>
> Its a similar issue with Opus as the codec is covered by a couple of 
> patents in the USA.
>
>
> What most people do is use MixMonitor to record to .wav (alaw) and 
> then in the 'h' extension call a program which runs a background task 
> to convert the .wav file to whatever format they wish.
>
> Thats what we do but we actually use the Monitor application and we 
> end up with both legs of the call and multiple sets of recordings if 
> people pause and unpause. We then move these files off to a different 
> server when they get mixed and converted to mp3 and then emailed out 
> to our customers. We do it this way to reduce the load on the Asterisk 
> boxes but also keep all the call recordings in a central location.
>
>


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Marek Cervenka
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