[AS3]as3.0中的flv视频和swf的文件截图示例代码

要对flv 截图，必面是下载方式，好像rtmp方式我没有试成功

package com.heyuansoft.image{ 
import com.adobe.images.JPGEncoder; 
    import com.adobe.images.BitString; 
    import flash.utils.*; 
import flash.display.*;    
    import flash.net.*; 
    import flash.events.*; 
    import flash.utils.ByteArray; 
import fl.video.*; 
 
public class CatchImageToSwf extends MovieClip{ 
   private var mc1:MovieClip = new MovieClip(); 
   private var ldinfo; 
   private var flvplay:FLVPlayback = new FLVPlayback(); 
   public function catchImageToSwf(){ 
     trace("start......"); 
   } 
   private function trim(myString:String){ 
    if(myString.indexOf(" ")==-1 && myString.indexOf("　")==-1){ 
     return myString; 
      } 
     var omyString:String=myString; 
     myString=replace(myString,"　"," "); 
     var lblanknum:Number=0; 
     var rblanknum:Number=0; 
    for(var i:Number=0;i<myString.length;i++){ 
     if(myString.charAt(i)!=" "){ 
         break; 
     }else{ 
        lblanknum++; 
     } 
     } 
    for(var j:Number=(myString.length-1);j>0;j--){ 
     if(myString.charAt(j)!=" "){ 
         break; 
     }else{ 
         rblanknum++; 
     } 
     } 
    return omyString.substring(lblanknum,(omyString.length-rblanknum)); 
} 
private function replace(s:String,o:String,n:String){ 
    return ss=s.split(o).join(n); 
   } 
   private function getFileName(URLpath:String){ 
    return URLpath.substring(URLpath.lastIndexOf("/")+1,URLpath.length); 
   } 
   private function getExpendName(URLpath:String){ 
    var fileName = getFileName(trim(URLpath)); 
    if(fileName.indexOf(".")==-1){ 
    return null; 
    }else{ 
    var temp:String =fileName.substring(fileName.lastIndexOf(".")+1,fileName.length); 
    return temp; 
         } 
   } 
   private function getError(e:Event):void{ 
     trace("error......"); 
   } 
   public function setMc1WidthAndHeight(w:Number,h:Number){ 
    mc1.width = w; 
    mc1.height = h; 
   } 
   public function setFlvPlayWidthAndHeight(w:Number,h:Number){ 
    flvplay.width=w; 
    flvplay.height=h 
   } 
   public function getImage(){ 
    var expendName = getExpendName(url); 
    switch(expendName){ 
     case null:trace("typeError"); 
     case "flv": playFlv(url,quality,serApp,imageName);break; 
     case "swf": playSwf(url,quality,serApp,imageName);break; 
     
    } 
   } 
   private function playFlv(flvUrl:String,quality:Number,serApp:String,imageName:String):void{ 
 
    flvplay.source=flvUrl; 
    flvplay.addEventListener("progress",printinfo); 
    function printinfo(infoObj:VideoProgressEvent):void{ 
     if(infoObj.bytesLoaded == flvplay.bytesTotal){  
//这里要注意的就是不须要这么久， 
//可以下载到二分之一处就行，因为我只要在三分之一的地方截图 
     trace("source : "+flvplay.bytesTotal); 
     trace(Math.floor(flvplay.totalTime/3)); 
    flvplay.seekSeconds(Math.floor(flvplay.totalTime/3)); 
     } 
    } 
    flvplay.addEventListener("seeked",compSeek); 
    function compSeek(e:Event){ 
     trace("seeked"); 
     
     createJpg(flvplay,quality,serApp,imageName); 
      flvplay.stop(); 
    } 
    
   } 
   
   private function playSwf(swfUrl:String,quality:Number,serApp:String,imageName:String):void{ 
    var myVar:int = Math.floor(Math.random()*1000000); 
    var url_img:URLRequest = new URLRequest(swfUrl+"?number="+myVar); 
    var ld:Loader = new Loader(); 
    ldldinfo=ld.contentLoaderInfo; 
    ldinfo.addEventListener(Event.COMPLETE,getinfo); 
    function getinfo(e:Event):void{ 
      try{ 
          mc1 =ldinfo.content; 
       mc1.gotoAndStop(Math.ceil(mc1.totalFrames/3)); 
        createJpg(mc1,quality,serApp,imageName); 
         }catch(error:TypeError){ 
       mc1.addChild(ld); 
       var minuteTimer:Timer = new Timer(3000, 1); 
         minuteTimer.start(); 
                  minuteTimer.addEventListener(TimerEvent.TIMER, onTick); 
       function onTick(event:Event):void 
              { 
        createJpg(mc1,quality,serApp,imageName); 
       } 
      } 
      } 
    ldinfo.addEventListener("ioError" ,getError); 
    ld.load(url_img); 
   } 
   private function createJpg(object:DisplayObject,quality:Number,serApp:String,imageName:String):void{ 
    trace("xxx"+mc1.height); 
    if(object.width!=0||object.height!=0){ 
    var jpgBd:BitmapData = new BitmapData(object.width,object.height); 
    jpgBd.draw(object); 
    var jpgEncoder:JPGEncoder = new JPGEncoder(quality); 
    var jpgStream:ByteArray = jpgEncoder.encode(jpgBd); 
    trace("jpgStream:"+jpgStream.length); 
    var header:URLRequestHeader = new URLRequestHeader("Content-type","application/octet-stream"); 
    var url:String =serApp+imageName; 
    trace(url); 
    var jpgURLRequest:URLRequest = new URLRequest (url);   
    jpgURLRequest.requestHeaders.push(header);     
    jpgURLRequest.method = URLRequestMethod.POST;     
    jpgURLRequest.data = jpgStream; 
    //navigateToURL(jpgURLRequest); 
    var myLoader:URLLoader = new URLLoader(jpgURLRequest); 
    } 
   } 
} 
}