Issue with rendering video on canvas - reg

[Satyanarayana N]

Hi,

I want to achieve the following task.

(1) Load a video file (mp4) from local file system, preview it on canvas element
and upload the file on to remote server.

The code that i have written for this purpose which fires on onchange event
while selecting the file from local file system is as follows.

var files = evt.target.files;
var reader = new FileReader();
if (files[0].type.match('video.*')) {
figure = 'video';
vcanvas = document.getElementById('vcanvas');
vcanvas.onplay = function(event) {
draw(vcanvas,whiteboardContext);
displayUploadButton(); //For displaying a button to upload the file
after successful preview on canvas
}
reader.onloadend = function() {
console.log('reader.readyState ' + reader.readyState);
vcanvas.src = reader.result;
progressbar.value = 0;
progressbar.style.display = 'none';
progressbar.style.zIndex = '0';
vcanvas.play();
}
reader.readAsDataURL(files[0]);
}

the draw method is written as follows.

function draw(v, c) {
if (v.ended || v.paused) {
vcanvas = undefined;
clearTimeout(vctimer_id);
return true;
}
c.drawImage(v, 0, 0, whiteboard.width, whiteboard.height);
console.log(v.currentTime);
vctimer_id = setTimeout(draw, 20, v, c);
}

Issue:

When I choose a small video of size (375KB) it is working fine but when I choose
large file (size: 38.2 MB) it is failing to load.

Can you tell me what is going wrong here, i am unable to resolve the issue.

Regards,
Satya
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