import processing.video.*;
  
  Capture video;
  int column;
  int columnCount;
  int lastRow;
  
  // Buffer used to move all the pixels up
  int[] scoot;
  
  void setup() {
    size(640, 480, P3D);
  
    // Uses the default video input, see the reference if this causes an error
    video = new Capture(this, 32, 24);
    // Also try with other video sizes
    
    column = 0;
    columnCount = width / video.width;
    int rowCount = height / video.height;
    lastRow = rowCount - 1;
    
    scoot = new int[lastRow*video.height * width];
    background(0);
  }
  
  void draw() {
    // By using video.available, only the frame rate need be set inside setup()
    if (video.available()) {
      video.read();
      set(video.width*column, video.height*lastRow, video);
      column++;
      if (column == columnCount) {
        loadPixels();
          
        // Scoot everybody up one row
        arraycopy(pixels, video.height*width, scoot, 0, scoot.length);
        arraycopy(scoot, 0, pixels, 0, scoot.length);
  
        // Set the moved row to black
        for (int i = scoot.length; i < width*height; i++) {
          pixels[i] = #000000;
        }
        column = 0;
        updatePixels();
      }
    }
  }