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Masking video? (Read 816 times)
willmarshall
Masking video?
Aug 23rd, 2009, 12:41am  
Hi,

Can someone explain to me how to mask() each frame of a video?

I've got it working: but only briefly. The mask flashes on the screen and then vanishes.

My current code looks like:

Quote:
     
import processing.video.*;
Movie myMovie;
PImage b;

void setup() {
 size(360, 240);
 myMovie = new Movie(this, "rain.mov");
 myMovie.speed(0.1);
 myMovie.loop();
 b = loadImage("circle.gif");
}

void draw() {
 myMovie.mask(b);
 image(myMovie, 0, 0);
}

// Called every time a new frame is available to read
void movieEvent(Movie ghost) {
  ghost.read();
}


Cheers,
Will.
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swampmonster
Re: Masking video?
Reply #1 - Apr 14th, 2010, 12:02pm  
I've experienced similar problems. when masking a movie with a still image (in draw), the image will slowly fade out. i can only assume that the alpha is compounding over time.
the only thing that has worked for me so far is to make the movie with an alphs (rgb + a) and use the movie as the mask for itself.
it would be great to use a still image, since the rgba movie is much larger.
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