Justafriend.ie - Current Frame from Timecode Example

currentFrameFromTimecode.example.js

function getCurrentFrameFromTimecode() {
	frame_canvas_ctx.drawImage(video, 961, 0, 1, 16, 0, 0, 1, 16);
	var timeBitmap = frame_canvas_ctx.getImageData(0, 0, 1, 16);
	var timeData = timeBitmap.data;
	var frame = 0;
	var value;
	for (var i = timeData.length - 1; i >= 0; i -= 4) {
	    value = (timeData[i - 3] + timeData[i - 2]
	    	+ timeData[i - 1]) > 125 ? 1 : 0;
	    if (Math.floor(i / 4) == 15) {
	        frame = value << Math.floor(i / 4);
	    } else {
	        frame |= value << Math.floor(i / 4);
	    }
	}
	current_frame_text = "Frame: "+frame;
	return frame;
}