[asterisk-dev] Opus and VP8

[Andrea Suisani]

On Wed, June 5, 2013 5:53 pm, Lorenzo Miniero wrote:
> Hi Andrea,

>> [cut explanation of a maybe false theory]
>>
>> scratch what I said before.
>>
>> I've reproduced the behavior (use 48kHz instead of 8kHz) with a plain
>> and
>> simple
>> webrtc client (a local copy of http://tryit.jssip.net/) and I've tried
>> to
>> place
>> a call without using AMI Originate through a simple dialplan Dial and I
>> got the same
>> result, this is the console log
>>
>>
> The same scenario, in my setup, works fine: a browser calling a softphone
> using a narrowband codec (e.g., u-Law) is capped to 8kHz, opus<->8000.
>
> I guess the only difference between our scenarios (except for the several
> MACROS that are not in my test extension) is the protocol: in my
> extensions, only SIP is involved, and not IAX2. This may be what is
> causing
> the issue, as recently someone posted a similar problem on github:
>
> https://github.com/meetecho/asterisk-opus/issues/1#issuecomment-18926261
>
> Unfortunately I'm unfamiliar with IAX, so I don't know how codecs are
> negotiated and the related translation paths put in place for a call.


many thanks Lorenzo tomorrow I will try to test using SIP protocol
on both call legs.