Reading a video frame-by-frame with OpenCV in Processing (not javascript)

gistfile1.js

import hypermedia.video.*;
OpenCV opencv;

PImage frame;
void setup() {
  size( 640, 360 );
  frameRate(30);

  opencv = new OpenCV( this );
  opencv.movie( "mymovie.mov", width, height );
}

void draw() {
  opencv.read();    
  frame = opencv.image();
  image(frame,0,0);
}