[Freeswitch-users] Save voicemail in opus format

[jonathan augenstine]

I will try to summarize to avoid previous conversations on this topic.
Supporting the recording and playback of opus format files is difficult to
impossible.  This issue stems from the fact that opus is a stateful codec.
This translates into the reality that attempting to simply inject the opus
bitstream into a current call can result in a mismatch of the parameters
giving an inaudible playback.  The stateful codecs not only vary from call
to call but can change within the same call.  I have already gone down this
road and it is a dead-end.

Jonathan

On Thu, Nov 20, 2014 at 11:38 AM, Kamil Nigmatullin <
kamil.nigmatullin at gmail.com> wrote:

> Hello. I want to save voicemail in opus codec so that client could listen
> it without transcoding.
>
> I set extension to opus instead of wav. Freeswitch started to write file
> with opus extension and it content of the file looks diffrent than wav. But
> I can playback this file even with unloaded mod_opus. VLC cannot play this
> file.
>
> How can this be explained?
>
>
> --
> Kamil Nigmatullin
> Skype: kamil.nigmatullin
>
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