var vScale = 15;

​

function setup() {

  createCanvas(640,480);

  pixelDensity(1);

  video = createCapture(VIDEO);

  video.size(width/vScale, height/vScale);

  video.hide();

}

​

function draw() {

  background(241, 196, 15);

  video.loadPixels();

  loadPixels();

  for(var y = 0; y < video.height; y++){

    for(var x = 0; x < video.width; x++){

      var index = (video.width-x+1+(y*video.width))*4;//mirro:w-x-1

      var r = video.pixels[index+0];

      var g = video.pixels[index+1];

      var b = video.pixels[index+2];

      var bright = (r+g+b)/3;

      var w = map(bright,0,255,0,vScale);

      noStroke();

      fill(bright);

   rect(x*vScale,y*vScale,w,w);    //rect(x*vScale,y*vScale,vScale,vScale);

      // pixels[index+0] = bright;//x;

      // pixels[index+1] = bright; //random(255);

      // pixels[index+2] = bright; //y;

      // pixels[index+3] = 255;

    }

  }

  // updatePixels();

}