AS3 简易加载卸载FLV

package src {
 /**
  * 张启龙 2010 3 4
  * ansonzql@gmail.com
  * this class is for loading and unloading flv without add any player
  */
    import flash.display.*;
    import flash.events.*;
    import flash.media.Video;
    import flash.net.NetConnection;
    import flash.net.NetStream;
 import flash.display.MovieClip;
 import flash.ui.Mouse;
 import flash.utils.Timer;
 import flash.media.SoundMixer;

    public class CLoadFlv
 {
        private var videoURL:String;
  private var loop:Boolean;
        private var connection:NetConnection;
        private var stream:NetStream;
  public static var _h:Number = 0;
  public static var _w:Number = 0;
  public static var _t:Number = 0;
  public var sdd:Boolean = false;
  public var video:Video;
  private var _time_out:Timer;
  private const times_out:Number = 20;
  private var _display:DisplayObjectContainer;

        public function CLoadFlv(_videoURL:String,dis:DisplayObjectContainer, _loop:Boolean = true)
  {
   
   if (_videoURL == "")
   {
    new Error("video can't be null!");
   }
   else
   {
    this.videoURL = _videoURL;
   }
   
   if (dis != null)
   {
    this._display = dis;
   }
   
   this.loop = _loop;
   
   
   this._time_out = new Timer(times_out, 101);
   this._time_out.addEventListener(TimerEvent.TIMER, Get_out);
   
            this.connection = new NetConnection();
            this.connection.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
            this.connection.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
            this.connection.connect(null);
        }
  
  //淡出
  private function Get_out(e:TimerEvent)
  {
   if (this.video.alpha > 0)
   {
    this.video.alpha -= 0.02;
   }
   else
   {
    this.video.alpha = 0;
    this._time_out.stop();
    this._time_out.reset();
    this.release_flv();
    
   }
  }
  
  //施放资源
  private function release_flv():void
  {
   this._display.removeChild(video);
   this._display.removeEventListener(Event.ENTER_FRAME,check_over);
   this.video = null;
   this.stream = null;
   SoundMixer.stopAll();
  }
  
  //加载前的信息
        private function netStatusHandler(event:NetStatusEvent):void {
            switch (event.info.code) {
                case "NetConnection.Connect.Success":
                    this.connectStream();
                    break;
                case "NetStream.Play.StreamNotFound":
                    trace("Unable to locate video: " + videoURL);
                    break;
            }
        }
  
  
        private function connectStream():void {
           this.stream = new NetStream(connection);
            this.stream.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
            this.stream.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
   this.stream.client = new CustomClient();
            this.video = new Video();
            this.video.attachNetStream(stream);
   this.video.smoothing = true;
   this.stream.play(videoURL);
   this._display.addEventListener(Event.ENTER_FRAME,check_over)
        }
  
  
  public function playnext():void
  {
   this._time_out.start();
  }
  
  //这里要重新设置过大小
  public function check_over(e:Event)
  {
   if(_w != 0 && this.sdd == false)
   {
    
    
    this.sdd = true;
             this. _display.addChildAt(video,1);

    this.video.width = _w;
    this.video.height = _h;

    
   }

   if (this.stream.time == _t && this.loop == true )
   {
    this.stream.seek(0);
   }
  }
  
  

        private function securityErrorHandler(event:SecurityErrorEvent):void {
            trace("securityErrorHandler: " + event);
        }
       
        private function asyncErrorHandler(event:AsyncErrorEvent):void {
            // ignore AsyncErrorEvent events.
        }
    }
 
 }
 
 //客户端
class CustomClient {
    public function onMetaData(info:Object):void {
        trace("metadata: duration=" + info.duration + " width=" + info.width + " height=" + info.height + " framerate=" + info.framerate);
     src.CLoadFlv._h = info.height;
  src.CLoadFlv._w = info.width;
  src.CLoadFlv._t = info.duration
 }
    public function onCuePoint(info:Object):void {
        trace("cuepoint: time=" + info.time + " name=" + info.name + " type=" + info.type);
    }
 public function onXMPData(info:Object):void
 { 
 }
 }