Realtime Web Messaging over Animated Gifs(github.com)

    <img src="test.gif" id="img">

    <script type=text/javascript>
    var img = document.getElementById("img");
    var canvas = document.createElement("canvas");
    canvas.width = img.width;
    canvas.height = img.height;

    var ctx = canvas.getContext("2d");
    ctx.drawImage(img, 0, 0);

    var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
    </script>