Hans-Christoph Steiner a écrit :
I haven't written a shader before, anyone have one they could share?
yes, there are some in the Gem examples.
example/10.glsl directory
Or
is this possible without shaders, i.e. just Gem objects?
pix_alpha does it, but it's very basic.
pix_coloralpha can do it with other pix_objects.
Cyrille
.hc
On Apr 20, 2009, at 3:55 PM, chris clepper wrote:
I have done a lot of this type of processing with a shader. Just pick
the color in the desired range and set the alpha of a pixel in that
range to 0. After that just lay the video on top of each other.
On Mon, Apr 20, 2009 at 3:34 PM, Hans-Christoph Steiner <[email protected]
<mailto:[email protected]>> wrote:
I was wondering whether it is possible convert a specific color,
like green-screen chroma key, to alpha information using Gem.
They idea is to overlap many green-screen videos. I can see the
pieces, but I can't see the whole.
.hc
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