hello,
i want to compare the pixels of two consecutive frames. with my code i only get a black screen, so i guess i made a mistake in the draw method.
thx for your help,
martina



import processing.video.*;

Movie myMovie;
color lastFramesColors[], thisFramesColors[];


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

 thisFramesColors = new color[width*height];
 lastFramesColors =  new color[width*height];
}


void movieEvent(Movie myMovie) {
 //copy this frame's pixels into last frame's pixels
 for(int k=0; k<thisFramesColors.length; k++) {
   lastFramesColors[k] = thisFramesColors[k] ;
 }

 //copy this frame's pixels into arr thisFramesColors[]  
 myMovie.read();
 for(int i=0; i<height; i++) {
   for(int j=0; j<width; j++) {
     thisFramesColors[i * width + j] = myMovie.get(j,i);
   }
 }
}


void draw() {  
 //compare pixels of this and last frame and color them
 for(int i=0; i<height; i++) {
   for(int j=0; j<width; j++) {
     if(thisFramesColors[i * width + j] != lastFramesColors[i * width + j]){
       fill(255,0,0);
       rect(j,i,5,5);
     }
     else{
       fill(255,255,255);
       rect(j,i,5,5);
     }
   }
 }
}