Estimating time to download a file (FLV / MP3)

i trying estimate how take user download mp3 /flv file.

 

 

private function init():void {                _netstream = new netstream(_netconnection);                                _netstream.play(test.flv");                 _netstream.client = _metadataobj;                 bandwidth = new timer(3000,1);                 bandwidth .addeventlistener(timerevent.timer , oncalculatebandwidth, false , 0 , true);                 bandwidth .start();                  checkvideoprogress = new timer(100,0);                 checkvideoprogress.addeventlistener(timerevent.timer , onvideoprogresshandler , false , 0 , true);                 checkvideoprogress.start();                 _starttime=gettimer(); }   private function onvideoprogresshandler(e:timerevent):void  {                               if (_netstream.bytesloaded == _netstream.bytestotal)                 {                     trace("actual download time = " + math.ceil((gettimer() - _starttime)/1000));                                  checkvideoprogress.stop();                                    }   }   private function oncalculatebandwidth(e:timerevent):void  {      var timetodownloadfile:number= math.ceil((3 * _netstream.bytestotal) / _netstream.bytesloaded); } 

 

so check bytesloaded in 3 seconds  , try estimate how long take download bytestotal reason numbers way off

 

24 sec when actual download time 10 sec

330 sec when actual download time 26sec

 

thanks,

firdosh

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