RFA controll fps

RFAFrame

var interval = 1000/30;
var then = Date.now();
var startTime = then;
var elapsed;
var frameCount = 0;

function animate(){
  now = Date.now();
  elapsed = now - then;

  if (elapsed > interval) {
    then = now - (elapsed % interval);
    _this.drawVideo();
  }

  _this.videoInfo.interval = requestAnimationFrame(animate);
}
animate();