Speex dev - May 2008 - Plain Speex, or GStreamer?

On May 5, 2008, at 6:58 PM, Jean-Marc Valin wrote:
> Joshua Gargus wrote:
>> Our app needs to support multiple media types, so GStreamer would  
>> seem
>> to be the obvious choice.  However, voice quality is paramount for
>> us.  Are there any disadvantages to using the Speex plugin for
>> GStreamer as opposed to directly coding to the Speex API?
>
> Don't know gstreamer well, but I assume that not all encoding options
> are supported in gstreamer. If you only want the standard options  
> (which
> is what I recommend unless you *know* you want something else), it
> should be the same. The decoder will likely work the same.
I think that the standard options should be fine.
>
>
>> In
>> particular, does the GStreamer element fully support the echo-
>> cancellation and jitter-buffer features of Speex?
>
> I highly doubt it.
You're right (as confirmed by grepping the Speex-GStreamer sources).   
Darn.
>
>
>> Are there any other
>> pitfalls that a naive developer (and new to both APIs) should be  
>> aware
>> of?
>
> I assume your application is VoIP or something vaguely similar.
It's a virtual environment with VoIP built in.  GStreamer is  
attractive because we eventually want to have lip-synced video.
> In that
> case, the hardest thing to get right is doing the soundcard capture  
> and
> playback without having a huge buffer, not getting xruns (skips).
Thanks, I'll make sure that I test for those.

Josh

>
>
> 	Jean-Marc

On 5/6/08, Joshua Gargus <schwa at fastmail.us>
wrote:
> It's a virtual environment with VoIP built in.  GStreamer is
> attractive because we eventually want to have lip-synced video.
You can pair Speex with Theora.  Jingle (video/voice part of XMPP) is
doing that, too.

-Ivo

Thanks for the hint.  I think that we'll stick with h.264 for now, but  
I'll be keeping my eye on Dirac as a free alternative.

Josh



On May 6, 2008, at 9:58 AM, Ivo Emanuel Gon?alves wrote:
> On 5/6/08, Joshua Gargus <schwa at fastmail.us> wrote:
>> It's a virtual environment with VoIP built in.  GStreamer is
>> attractive because we eventually want to have lip-synced video.
>
> You can pair Speex with Theora.  Jingle (video/voice part of XMPP) is
> doing that, too.
>
> -Ivo