Question

我对处理很新，所以请原谅我这是一个愚蠢的问题。如果有以下代码：`

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);
  background(0);
  myVideo.loop();
}

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

void draw() {
  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;
  }
}`

然而，我可以听到音乐播放，但屏幕保持黑色。有谁知道如何解决这一问题？提前谢谢。

Answer 1

你必须把

image(myVideo, 0, 0);

进入draw()功能并从background 0;删除setup()。显然，您的视频必须是程序文件夹。请https://processing.org/reference/image_.html正确使用它。

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;
  }
}

处理视频保持黑色

1 个答案: