Latency (sync VideoElement with MovieClip)

Question

Hi,
I have a MovieClip witch contain several visuals elements, movieclip
timeline must be sync with VideoElement.
To do that, I start movieclip timeline when BUFFERING mediaplayer state
is false, each 10 ms, I check if visual timeline needed to be resync
whith mediaPlayer.currentTime (if time difference is equal or greater
than 20 ms)
The problem is : on Windows there is a latency witch affect the user
experience, on mac it works like a charm.
I use FLash CS5 and Flex SDK 4.5 + Flash Player 10.2
This is my code (sample) :
_videoElement = new VideoElement( null, new HTTPStreamingNetLoader());
_parallelElement = new ParallelElement();
_parallelElement.addChild(_videoElement);
_mediaPlayer = new MediaPlayer(_parallelElement);
_mediaPlayer.currentTimeUpdateInterval = 10;
_mediaPlayer.addEventListener(TimeEvent.CURRENT_TIME_CHANGE,
currentTimeChangeHandler);
_mediaPlayer.addEventListener(BufferEvent.BUFFERING_CHANGE,
bufferingChangeHandler);
_mediaPlayer.play();
function bufferingChangeHandler(event:BufferEvent):void
if(!event.buffering)
       timeline.play();
else
       timeline.pause();
function currentTimeChangeHandler(event:TimeEvent):void
       //check if timeline need to be sync
       var timelineInterval:Number = timeline.currentTime -
_mediaPlayer.currentTime;
       if (Math.abs(timelineInterval) > 0.2 )
               timeline.currentTime = _mediaPlayer.currentTime;
Timeline is ALWAYS sync. But visually we can see timeline in advance of
the video, probably because of latency or less depending on the system.
*** Sometimes I got 150 ms, sometimes 50ms. ***
on Mac is always less than 30 ms
If i use HTTPStreamingNetLoader NetStream.appendBytes() is used no ? so latency should be better ?
What can I do to have a latency close to 0 in any environment ?
Thanks !!

Answer 1

Nobody can help me ? :/