[PD] PD and GEM for virtual environments

chris clepper cgc at humboldtblvd.com
Tue Feb 1 21:41:50 CET 2005

On Jan 31, 2005, at 6:21 PM, doktorp wrote:
>  We last tested max/jitter using a very large 1600x600 (2 800x600 
> quicktimes 'glued' together) and using jit.scissors to separate them 
> to two instances of jit.window. Even on a dual G5 2.5 Ghz with 4 Gb 
> ram, we dropped frames using mjpeg codec, but uncompressed video 
> seemed to be ok. I would like very much to use Gem, but since one cant 
> instantiate two windows (on OS X at least..), I thought it might not 
> work... I dont think that G5 ever worked that hard, which to me was 
> very very surprising.

The test build of GEM just posted allows for two windows with the same 
rendering context.  I would think you could use this and either adjust 
the viewport or texture coordinates to split the frame in half.  A 
single stereo view could work as well, but I don't have any experience 
with that.

The best way to keep sync would be to stitch the two frames into one 
1600x600 in another application (AfterEffects?).  I have used pix_movie 
on a dual 2 Ghz G5 to run 1920x1080 photo-jpeg without any problems, so 
I don't think you will have any trouble with your frame size.  You 
could try two pix_movies and incrementing the frames using a counter, 
which would work in theory, but we all know how well theory works in 


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