snapshot

function getSnapshot(callback) {
	"use strict";
	callback = callback || Boolean;
	var canvas = document.createElement("canvas"),
		ctx = canvas.getContext("2d"),
		webkit = false,
		moz = false,
		v = null,
		W = 800,
		H = 600,
		n = navigator,
		dataBuffer = [],
		err = Boolean,
		v = document.createElement("video");
	canvas.height = v.height = H;
	canvas.width = v.width = W;
	var payload = {
		video: {
			facingMode: "environment",
			width: W,
			height: H,
			framerate: 10,
		},
		audio: false
	};
	var meth = n.getUserMedia || n.webkitGetUserMedia || n.mozGetUserMedia;
	meth.call(n, payload, success, err);

	function dumpCanvas() {
		var imgurl = canvas.toDataURL("image/jpeg", 0.5);
		if(imgurl.length < 12000) {
			return setTimeout(updateCanvas, 50);
		} else {
			updateCanvas.stop();
		}
		callback(canvas.toDataURL("image/jpeg", 0.5));
	}

	function updateCanvas() {
		ctx.drawImage(v, 0, 0, W, H);
		setTimeout(dumpCanvas, 25);
	}

	function success(stream) {
		updateCanvas.stop = function() {
			stream.getTracks()[0].stop();
		};
		v.src = URL.createObjectURL(stream);
		setTimeout(updateCanvas, 89);
	}
}


//////////////////////////////////

function getSnapshot(e){function f(){if(12e3>a.toDataURL("image/jpeg",.5).length)return setTimeout(c,50);c.stop(),e(a.toDataURL("image/jpeg",.5))}function c(){g.drawImage(b,0,0,800,600),setTimeout(f,25)}e=e||Boolean;var a=document.createElement("canvas"),g=a.getContext("2d"),b=null,d=navigator,h=Boolean,b=document.createElement("video");a.height=b.height=600,a.width=b.width=800,(d.getUserMedia||d.webkitGetUserMedia||d.mozGetUserMedia).call(d,{video:{facingMode:"environment",width:800,height:600,framerate:10},audio:!1},function(a){c.stop=function(){a.getTracks()[0].stop()},b.src=URL.createObjectURL(a),setTimeout(c,89)},h)}