Transparancy

vvvv beta general
1

hi there

can anyone give me some tips on playing transparent video?
been trying some things with alpa and RGB video and the blend node but it does not really work out the right way.

I need to play layers of animals over a background, background stays the same, animals change

some tips maybe?

thnx

art

2

Look here about transparency and this thread and this thread
There should be some ideas how to get it work for your task.

3

One video for alpha and one for RGB. Combine them in a shader.
If you want you can even have different alpha for each RGB element that way.
Should be simple and timing each video should not be a problem I think.

4

I wouldnt agree, you might have some problems of frame inaccurancies by getting two videos out of a hard disk. Why not merge both into one double sized video and then compute it by a shader? In the second thread link is a shader I’ve done for this purpose.

5

also a simple avisynth script can play two videos from disk, side by side. no need to render/merge them into one file.

6

hi all thanx for advice

it did not work out because my graphicscard cant do pixelshaders so I need a new one

I’ll be buying a new computer probably, can anybody give me some advide on what to buy? my patch is going to have to handle with a lot of video’s playing and some interactivity

thnx
art

7

I’ll be buying a new computer probably, can anybody give me some advice on what to
buy

See: SystemRecommendations

8

I need to play layers of animals over a background, background stays the same, animals change

color keyer, using blue or green background can do it also, if your animals are videos. color keyer should be usable with any computer and old graphic card

9

thnx all

that was very helpfull…
thnx