Re: iChat perspective view
Re: iChat perspective view
- Subject: Re: iChat perspective view
- From: Shaun Wexler <email@hidden>
- Date: Sat, 17 Jul 2004 14:21:47 -0700
On Jul 17, 2004, at 12:52 PM, Lorenzo wrote:
>
Hi,
>
I have just seen the Tiger QT KeyNote movie at Apple.com and I ask
>
that to
>
myself: which technology does Apple use to display the iChat Video
>
Conference image in a perspective view? OpenGL? As I experienced OpenGL
>
doesn't allow to manage great amount of movie data. So, when the users
>
are
>
10, taking the whole screen, how can they use OpenGL? Maybe "Core
>
Image"?
>
Have you a vague idea?
It's quite simple to perform in OpenGL, using texture-mapped
quadrilaterals, with efficient streaming of video frames with
hardware-accelerated rendering directly to textures. There are a few
examples in Apple Sample Code to show you how to do this. I believe
that the new iChat AV in Tiger will allow the 3D video conferencing
between up to 4 simultaneous users (including yourself), and audio
conferencing will be limited to 10 users. The maximum frame rate of
[iSight] video is 30 fps... but in my own experience I don't think it's
often even close to that, more like 10 fps. CoreImage/CoreVideo are
still under NDA.
--
Shaun Wexler
MacFOH
http://www.macfoh.com
[demime 0.98b removed an attachment of type application/pkcs7-signature which had a name of smime.p7s]
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