问寻求在FLEX4.5 netStream byteArray中不工作

EN

// onmetadata function get all timestamp and corresponding fileposition..
function onMetaData(informationObject:Object):void 
{
    for (var propertyName:String in informationObject) 
    {
        if (propertyName == "keyframes")
        {
            var kfObject:Object = informationObject[propertyName];
            var timeArray:Array = kfObject["times"];
            var filePositionArray:Array = kfObject["filepositions"];

            for(var i:int=0;i<timeArray.length;i++)
            {
                var tagPosition:int = filePositionArray[i];//Read the tag size;
                var timestamp:Number = timeArray[i];//read the timestamp;
                tags.push({timestamp:timestamp,tagPosition:tagPosition});
            }
        }
    }
}

// onseek click get approximate timestamp and its fileposition
protected function seek_click(seektime:Number):void
{
    var currentTime:Number = 0;
    var previousTime:Number = 0;

    for (var i:int=1; i<tags.length; i++)
    {
        currentTime = tags[i].timestamp;
        previousTime = tags[i-1].timestamp;

        if(previousTime < seektime)
        {
            if(seektime < currentTime)
            {
                seekPos = tags[i-1].tagPosition;
                stream.seek(previousTime);
                break;
            }
        }
    }
}


// append bytes on seekposition
private function netStatusHandler(event:NetStatusEvent):void 
{
    switch (event.info.code) 
    {
        case "NetStream.Seek.Notify" :

        stream.appendBytesAction(NetStreamAppendBytesAction.RESET_SEEK);
        totalfilePositionArray.position = seekPos;

        var bytes:filePositionArray = new filePositionArray();

        totalfilePositionArray.readBytes(bytes);
        stream.appendBytes(bytes);

        stream.resume();

        break;
    }
}

var fileName:String = "dummy-video.flv";
ns.play(fileName);