var video;

​

var x = 0;

​

function setup() {

  createCanvas(800, 240);

  pixelDensity(1);

  video = createCapture(VIDEO);

  video.size(320, 240);

  background(0);

}

​

function draw() {

  video.loadPixels();

  // image(video, 0, 0);

​

  var w = video.width;

  var h = video.height;

​

  copy(video, w/2, 0, 1, h, x, 0, 1, h);

​

  x = x + 1;

  if (x > width) {

    x = 0;

  }

​

​

}