[jitter] Alpha Chanel on Video with black background

sounds like you need to do a basic 'add' composite.  literally add  
your animal to the background video using either jit.op or jit.slab  
before it's displayed on your videoplane.  look at the jit.gl.slab-op  
example in examples/jitter-examples/render/slab

popular video codecs that take an alpha channel are the Animation  
codec and Photo-Jpeg (I think)

On May 21, 2008, at 3:08 PM, David Dalmazzo wrote:

>
> Hi everybody
> I am trying to compose something using pictures with alpha. I am  
> putting all together using jit.gl.videoplanes with alpha_blend. But  
> I need to incorporate a video with an animal walking, the animal  
> more and less is white (but it looks real not only white) and the  
> background is totally black. Therefore, I need to add alpha channel  
> to the background but after some hours I don’t get it.  
> Anybody have a solution for this kind of compositions?
> I am trying to do a video with an animal without alpha and the  
> background with only alpha channel.
> The second question is what kind of video compression use alpha  
> channel?
> Thanks a lot for the help, I am running against time (like always).
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