​

function setup() {

  createCanvas(200, 200);

  capture = createCapture(VIDEO);

  capture.hide();

}

​

function draw() {

  image(capture, // what image to display

        0, 0,    // where to place the image on the canvas

        width,   // width to display

​

        // the height is more complicated:

        // we want the capture height to be

        // the width multiplied by the aspect ratio

    capture.height  *   width  / capture.width);

}