function myrnd(v){
				v = v + Math.floor(Math.random() * v);
				if(v>255)v=255;
				return v;
			}
			function videoSetupEx(){
			}
			function videoLoopEx() {
				context2.beginPath() ;
				context2.drawImage(myvideo, 0, 0, srcwid, srchei);
				var imgd = context2.getImageData(0, 0, wid, hei);
				var pix = imgd.data;
				for (var i = 0, n = pix.length; i < n; i += 4) {
					pix[i] = myrnd(pix[i],10);
					pix[i+1] = myrnd(pix[i+1],10);
					pix[i+2] = myrnd(pix[i+2],10);
				}
				context2.putImageData(imgd, 0, 0);
				mycontext.drawImage(canvas2,0,0);
			}