[PD] webcam to pix_video with VLC plugin on Mac OS X

Csaba Láng langcsaba at gmail.com
Thu Nov 22 16:12:53 CET 2018


sounds good, please share the shaders.
Is there any option to move from GPU to CPU so the pix_whatever objects can
manipulate them again?


On Thu, Nov 22, 2018 at 4:09 PM oliver <oliver at klingt.org> wrote:

> Csaba Láng wrote:
> > Dear List,
> >
> > I am still looking for a reasonable solution to have a video input to
> > Mac OS X with Gem.
> >
> > I was testing syphon_client, works almost OK, except that could not make
> > any motion detector out of it, no pix_background works with it, cannot
> > change contrast, threshold, basically nothing.
> as far as i know from the mac/MAX-world, with syphon you get a TEXTURE,
> not a pix. which means that all pix_ objects won't work, because the
> data is on the GPU (not pixels calculated by the CPU).
> this is actually a good thing for manipulating video as it's much more
> efficient, especially with larger image sizes.
> the "downside" of it is that you have to enter the openGL world to do
> things. maybe start by checking out any texture-related GEM objects,
> like those listed under "MANIPULATORS" in the GEM documentation
> ([color], [scaleXYZ], [rotateXYZ] ...) to see if it gets you anywhere.
> i have a handful of shaders concerning contrast, threshold, chromakey
> (the one i recently posted here) etc...
> if you want i can post them for testing
> best
> oliver
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