let x = 0;

​

function setup() {

  createCanvas(1920, 1080);

  video = createCapture(VIDEO);

  video.size(1920, 1080);

  video.hide();

  background(200);

}

​

function draw() {

  video.loadPixels();

  let w = video.width;

  let h = video.height;

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

  x = x + 1;

  if (x > width) {

    x = 0;

  }

}

​

function keyPressed() {

    save("monSlitScan-"+day()+"-"+hour()+"-"+minute()+"-"+second()+".jpg");

}