how to create a movie with processing

movie.pde

import processing.video.*;

int width = 200;
int height = 200;
int frames = 18;
String filename = "example.mov";
MovieMaker mm;

void setup(){
  size(width, height);
  
  mm = new MovieMaker(this, width, height, filename,
                      frames, MovieMaker.H263, MovieMaker.HIGH);
  
  frameRate(18);
}

void draw(){
  // draw some stuff
  // add the frame to the movie
  mm.addFrame();
}

void keyPressed() {
  // publish the movie
  if (key == ' ') {
    mm.finish(); 
  }
}