pelang

i try to mix up to 8 videos which have additional alpha channel (videocollage).

- is there a "faster" codec which supports additional alpha cannel than "animation" for jitter ?

- can i use openGL for mixing (jit.gl.slab) ?

- is it possible to mix more than 2 streams with jit.alphablend at the same time ? if not is there another way ?

- is it possible to mix more than 2 streams with jit.alphablend at    the same time ? if not is there another way ?

alpha-mix-2

Slabs are definitely a good way to go for this. With slabs and

jit.gl.videoplane, the alpha channel doesn't have to be contained in

the same texture as the video RGB data. Here's a simple

multitexturing videoplane example, but you could easily do more

Slabs are definitely a good way to go for this.  With slabs and
jit.gl.videoplane, the alpha channel doesn't have to be contained in
the same texture as the video RGB data.  Here's a simple
multitexturing videoplane example, but you could easily do more
flexible stuff with a custom shader:

thank you a lot to point me in the right direction...

it works fine with the "apply decal" funtkion for jit.gl.texture

any codecs recommends that hold a alphacannel ?

On Aug 14, 2008, at 10:58 PM, Robert Ramirez wrote:

I'm also doing a video collage project, however I would like to mix 1280 x 720 video with alpha channels (animation codec), AND have the ability to sample either video AND adjust the layer order.

In the patch pasted below, I used the jit.gl.texture tricks that were mentioned above, but I'm getting white pixels around the edges of the video layers. Any ideas on what I could do to get rid of these?

Also, since I am using video which already has an alpha channel, am I barred from using the uyvy colormode/shader?

i.e. [jit.gl.slab blah @file cc.uyvy2rgba.jxs @dimscale 2 1]

Is there anything else I should try for optimization?

In the patch pasted below,  I used the jit.gl.texture tricks that were mentioned above, but I'm getting white pixels around the edges of the video layers. Any ideas on what I could do to get rid of these?

Also, since I am using video which already has an alpha channel, am I barred from using the uyvy colormode/shader?
 i.e. [jit.gl.slab blah @file cc.uyvy2rgba.jxs @dimscale 2 1] 

Is there anything else I should try for optimization?


alpha mix