制作一个视频播放器

package  {
	
	import flash.display.MovieClip;
	import flash.net.NetStream;
	import flash.net.NetConnection;
	import flash.media.SoundTransform;
	import flash.media.Video;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.utils.ByteArray;
	import JPGEncoder.JPGEncoder;
	import flash.net.FileReference;
	import flash.display.BitmapData;
	import flash.geom.Rectangle;
	import flash.events.AsyncErrorEvent;
	
	public class VideoMain extends MovieClip {
		private var netStrem:NetStream;
		private var netconnection:NetConnection;
		private var soundtransform:SoundTransform;
		private var flag:int =1;
		private var video:Video;
		private var shichang:Number = 0;
		
		public function VideoMain() {
			initbar();
			init();
			getDispatchar();
		}
		private function initbar():void{
			_bar1.scaleX =0;
			_bar.scaleX = 0;
		}
		private function init():void{
			//NetStream 类提供了一些方法和属性，它们可用于跟踪文件的加载和播放进度，以及便于用户对回放进行控制（停止或暂停等）。
			netconnection = new NetConnection();
			//NetConnection 类在 Flash Player 和 Flash Media Server 应用程序之间或者 Flash Player 和运行 Flash Remoting 
		    //的应用程序服务器之间创建双向连接
			netconnection.connect(null);//传空参数
			netStrem = new NetStream(netconnection);
			netStrem.play('1.flv');
			///////////////////////////
			play_stop.buttonMode = true;
			stop_btn.buttonMode = true;
			jp.buttonMode = true;
			bar.bar1.buttonMode = true;
			////////////////////////
			//Video 类在应用程序中显示实时视频或录制视频，而无需在 SWF 文件中嵌入视频。
			video =new Video();
			video.x = 3;
			video.y = 3;
			//指定要在应用程序中 Video 对象的边界内显示的视频流。
			video.attachNetStream(netStrem);
			addChild(video);
			var obj:Object= new Object();
			//在 Flash Player 接收到正在播放的视频中嵌入的描述性信息时建立侦听器进行响应。
			obj.onMetaData = onHandler;
			//指定对其调用回调方法以处理流或 FLV 文件数据的对象。
			netStrem.client = obj;
			//netStrem.addEventListener(AsyncErrorEvent.ASYNC_ERROR, onMeta);//AsyncErrorEvent.ASYNC_ERROR常量定义 asyncError 事件对象的 type 属性值。
			soundtransform = new SoundTransform();
			addEventListener(Event.ENTER_FRAME,on_barHandler);
			addEventListener(Event.ENTER_FRAME,on_bar1eHandler);
		}
		
		private function on_barHandler(e:Event):void
		{
			_bar.scaleX = netStrem.bytesLoaded/netStrem.bytesTotal;
			if(_bar.scaleX == 1)
			{
				removeEventListener(Event.ENTER_FRAME,on_barHandler);
			}
		}
		private function on_bar1eHandler(e:Event):void
		{
			_bar1.scaleX = netStrem.time / shichang;
		}
		private function getDispatchar():void{
			//在文件中搜索到给定时间，以秒为单位指定，精确到小数点后三位（毫秒）。
			netStrem.seek(0);
			//暂停或恢复流的回放
			netStrem.togglePause();
			play_stop.addEventListener(MouseEvent.CLICK,onPlay_stopHandler);
			stop_btn.addEventListener(MouseEvent.CLICK,onStop_btnHandler);
			jp.addEventListener(MouseEvent.CLICK,onJpHandler);
			bar.bar1.addEventListener(MouseEvent.MOUSE_DOWN,onDownHandler);
			bar.bar1.addEventListener(MouseEvent.MOUSE_UP,onUpHandler);
		}
		private function onPlay_stopHandler(e:MouseEvent):void{
			netStrem.togglePause();
			if(flag == 1)
			{
				flag = 2;
				play_stop.gotoAndStop(flag);
			}
			else 
			{
				flag = 1;
				play_stop.gotoAndStop(flag);
			}
		}	
		private function onHandler(obj:Object):void
		{
			shichang = obj.duration;//以帧或秒为单位的补间动画的持续时间
		}
		private function onDownHandler(e:MouseEvent):void{
			bar.bar1.startDrag(true, new Rectangle(0, 0, bar.bar2.width, 0));
		}
		private function onUpHandler(e:MouseEvent):void{
			bar.bar1.stopDrag();
			if (bar.bar1.x > bar.bar2.width)
			{
				bar.bar1.x = bar.bar2.width;
			}
			soundtransform = new SoundTransform();
			soundtransform.volume = bar.bar1.x / bar.bar2.width;
			netStrem.soundTransform = soundtransform;
		}
	     private function onStop_btnHandler(e:MouseEvent):void{
			flag = 1;
			netStrem.pause();
			netStrem.seek(0);
			play_stop.gotoAndStop(flag);
			
	    }
		private function onJpHandler(e:MouseEvent):void{
			var bitmapdata:BitmapData = new BitmapData(video.width, video.height);
			bitmapdata.draw(video);
			var jpgEncode:JPGEncoder = new JPGEncoder();
			var bytesArr:ByteArray=ByteArray(jpgEncode.encode(bitmapdata));
			var file:FileReference = new FileReference();
			file.addEventListener(Event.SELECT, onselect);
			file.addEventListener(Event.CANCEL, oncancel);
			file.save(bytesArr, "未命名.jpg");
		}
		private function onselect(e:Event):void{
			trace("图片已保存");
		}
		private function oncancel(e:Event):void{
			trace("你取消了保存");
		}
	}
	
}