import processing.video.*;
Movie mv;

int flag = 0;

void setup() {
  size(480, 270);

  // read mp4 file
  mv = new Movie(this, "walking.mp4");
  mv.play();    // start play
  mv.pause();
}  

void draw() {
  if (mv.available() == false) {
    return;
  }

  mv.read();  // read frame  
  PImage Mimg = mv.get();  
  background(0);
  image(Mimg, 0, 0);  // display

}

void keyPressed() {
  if (key == ' ') {  //space
    if (flag == 0) {
      flag = 1;
      mv.play();
    } else {
      flag = 0;
      mv.pause();
    }
  }
}