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HTML5 Canvas drawImage with video source not working on Android

I am trying to use canvas's drawImage method with video source, but it's not working in Android 4.4.2, tested with Chrome browser.

Here's my code:

$(function() {

    var canvas = document.getElementById('canvas');
    var ctx = canvas.getContext('2d');
    var video = document.getElementById('video');

    var videoWidth; 
    var videoHeight;    

    var paused = false;

    canvas.addEventListener('click', function() {   
        if (paused) {
            video.play(); 
        } else {
            video.pause();
        }
        paused = !paused;
    });

    video.addEventListener("loadedmetadata", function() {
        videoWidth = this.videoWidth || this.width;
        videoHeight = this.videoHeight || this.height;
        canvas.width = videoWidth;
        canvas.height = videoHeight;
    }, false);

    video.addEventListener('play', function() {
        var $this = this; // cache
        (function loop() {
            if ( ! $this.paused && ! $this.ended ) {
                drawImage($this);
                requestAnimationFrame(loop);
                // setTimeout(loop, 1000 / 25); // drawing at 25 fps
            }
        })();
    }, 0);

    function drawImage(frame) {
        ctx.drawImage(frame, 0, 0);
        // ctx.clearRect ( 0 , 0 , canvas.width, canvas.height );
    }

});

Fiddle: http://jsfiddle.net/h1hjp0Lp/

Is there a way to make it works with Android and iOS devices as well?

like image 581
Kristian Vitozev Avatar asked May 25 '15 10:05

Kristian Vitozev


1 Answers

It seems to be an issue with that specific file format (mp4).

Substituting a webm file and it works fine.

Unfortunate, but that's been the way of <video> for a while (to really require webm/ogg and not just mp4, regardless of what browsers claim to support).

(I bet its a bug relating to anti-drm screenshot stuff? who knows)

for example use the source http://video.webmfiles.org/big-buck-bunny_trailer.webm and it will work: http://jsfiddle.net/h1hjp0Lp/15/

like image 137
Simon Sarris Avatar answered Oct 07 '22 18:10

Simon Sarris