Jeremy,
Is there a way to make it so that other codecs, such as dirac,
http://dirac.sourceforge.net/, etc can easily be implemented as well? I
suppose what I mean is a plugin within a plugin concept. You would have
a plugin such as osgAnimationGrabber and then in turn it would call
plugins such as osgTheora, osgDirac, osgQT, osgAVI, osgH264 and so on.
Is this possible? Does it make sense? I've never done anything like this
myself, and am also new to OSG so I might just be urinating into a fast
moving air stream but you never know :)
Regards,
Andrew Lowe
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of
> Jeremy Moles
> Sent: Wednesday, 30 August 2006 12:12 AM
> To: osg users
> Subject: [osg-users] RFC: osgTheora
>
> After a short (month-long!) stint w/ a few games I just had
> to play and get out of my system, I'm back to coding pretty
> heavy. :) I've been working hard on osgCairo, and have a lot
> of neat features added--with more to come.
>
> I decided I wanted to make a kinda of "demo" video and
> realized there simply isn't any good way to do this in Linux.
> There's {g,x}vidcap, though they aren't maintained and
> haven't actually compiled for me--ever. There's istanbul,
> which looks promising, but is much to slow to use for GL apps.
>
> So I've started tossing around the idea of writing a plugin
> for OSG that will act as another "render target", allowing
> you to encoded to Ogg/Theora (Theora being really the only
> nice, free, multi-platform codec I know about; besides, it
> needs love!)
>
> My question is, are there any pitfalls I should be aware of,
> or any advice from anyone who has done something similar?
>
> My approach was going to be requiring the user to
> render-to-image and then have a special
> CameraNode::DrawCallback that did the grabbing of the pixels
> and encoding to Theora. Furthermore, I was going to move as
> much as possible concerning the pixel conversion from RGBA to
> YUV420 (which is what Theora wants) in a fragment shader, to
> help try and speed things up.
>
> Does this sound reasonable? Can anyone see any holes (I'm
> sure there are some)? Right now I have a very basic example
> working using osgCairo and manually creating each frame,
> which isn't at all practical but does demonstrate I'm using
> libtheora correctly. :)
>
> Thanks...
>
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