你必须把

image(myVideo, 0, 0);

into draw() function and delete background 0; from your setup(). Obviously, your video must be into program folder. Look at https://processing.org/reference/image_.html to use it properly.

因此，您的代码将类似于：

import processing.video.*;

Movie myVideo;
int video_width     = 768;
int video_height    = 576;
int video_slice_x   = video_width/2;
int window_width    = 1000;
int window_height   = video_height;
int draw_position_x = 0; 
boolean newFrame  = false;

void setup() {
  myVideo = new Movie(this, "B1.mov");
  size(window_width, window_height, P2D);
  myVideo.loop();
}

void movieEvent(Movie myMovie) {
  myMovie.read();
  newFrame = true;
}

void draw() {
  image(myVideo, 0, 0);
  if (newFrame) {
    loadPixels();
    for (int y=0; y<window_height; y++){
      int setPixelIndex = y*window_width + draw_position_x;
      int getPixelIndex = y*video_width  + video_slice_x;
      pixels[setPixelIndex] = myVideo.pixels[getPixelIndex];
    }
    updatePixels();

    draw_position_x++;
    if (draw_position_x >= window_width) {
      exit();
    }
    newFrame = false;
  }
}