Hi I tried to add an alpha channel to a video in this example but it doesn't seem to work. Just curious what I have to do to add an alpha channel to a video. I thought I would see the red rectangle below the video here. Ultimately I want to change transparency between two videos. Any pointers?
Thanks,

// load video library
import processing.video.*;

Movie myMovie;
int numPixels;

void setup() {
  size(640, 480, P2D);
  background(0);
  // Load and play the video in a loop
  myMovie = new Movie(this, "station.mov");
  myMovie.loop();
}

void movieEvent(Movie myMovie) {

  myMovie.read();
  numPixels=myMovie.width*myMovie.height;
  myMovie.loadPixels();
  for(int i=0; i<numPixels; i++) {
    myMovie.pixels[i]=(myMovie.pixels[i]&0x00FFFFFF)|0x1F000000;
  }
  myMovie.updatePixels();
}


void draw() {
  fill(255,0,0);
  rect(0,0,100,100);
  image(myMovie, 0, 0);
}