[Asterisk-video] video spy

[Klaus Darilion]

Emmanuel BUU schrieb:
> Klaus Darilion a écrit :
>> Emmanuel BUU schrieb:
>>   
>>> aster vdo a écrit :
>>>     
>>>>           This solution perfcectly works on SIP channels but on real
>>>> time that is with the h324m and Zap channels there is no audio of
>>>> caller or the callee passed to the Spy channel, video works fine.I
>>>> dont see asterisk generating any error but the audo is still missing.
>>>>   
>>>>       
>>> Ok, I know why this is not working. Zap / h324m are using amr codec for 
>>> audio and app_conference does not support this.
>>> A minor modification to app_conference source is required to support amr 
>>> (hint: add a transcoder).
>>>     
>>
>> Is it really necessary to extend app_conference? When the AMR codec is 
>> installed to asterisk, asterisk should do the transcoding itself.
>>   
> Well, as far as I understand app_conference, the app request transcoding 
> explicitly to SLINEAR using asterisk audio transcoding mechanism of course.
> Mihai would explain it more clearly and also the reasons why AMR is not 
> supported (licencing issues, non standard AST_FORMAT_AMR definitions ...)

Licensing is one thing. But with the AMR codec on sip.fontventa.com 
transcoding works fine. Thus I thought it should work with 
app_conference too.

This AMR codec uses "octed-aligned" RTP format in ast_frame. So what is 
the problem with non-standard definition?

regards
klaus

>> regards
>> klaus
>>
>>   
>>>
>>>
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