GMU:Processing im Park/Part3

Sound and Video Processing

Video Processing

Video Delay

import processing.video.*;

Capture camera;
int maxFrames;
int d = 4;
boolean recording = false;

ArrayList frames = new ArrayList();


void setup() {
  
  size(640, 480);
  
  maxFrames = width / d;
  
  // init camera
  camera = new Capture(this, width, height);
  
  camera.start(); // wichtig!
  
  // add first image
  PImage img = createImage(width, height, RGB);
  frames.add(img);

}


void draw() {
  
  int n = frames.size();
  
  // iterate over vertical strips
  for(int i = 0; i < n; i++) {
    
    // get snip from the frame
    PImage img = (PImage) frames.get(i);
    
    // x coordinate for the left side of the current strip
    int x1 = int(map(i, 0, n-1, 0, width/2 - 100));
    int y1 = int(map(i, 0, n-1, 0, height/2 - 100));
    
    int x2 = width - x1;
    int y2 = height - y1;
    
    int w = x2 - y1;
    int h = y2 - y1;
    
    PImage snip = img.get(x1, y1, w, h);
    
    // show strip on screen
    //tint(255, 50);
    image(snip, x1, y1);
    
  }
  
  if(recording) {
    
    saveFrame("frame-####.png");
    
    // recording feedback
    stroke(255, 0, 0);
    noFill();
    strokeWeight(5);
    rect(0, 0, width, height);

  }

}

void keyPressed() {
  recording = !recording;
}

void captureEvent(Capture camera) {
  
  camera.read(); // wichtig!
  PImage img = camera.get();
  
  frames.add(img);
  
  if( frames.size() > maxFrames) {
    frames.remove(0);
  } 
  
}