ActionScript，NetStream.Play.Failed iOS AIR手机

我试图在m4a（aac）stream类似于Tiberiu-Ionuţ斯坦本地audio文件（http://stackoverflow.com/questions/2036107/aac-mp4-not-working-in-actionscript-3s-netstream）：

package { import flash.net.NetConnection; import flash.net.NetStream; import flash.events.NetStatusEvent; import flash.events.AsyncErrorEvent; import flash.events.Event; public class Mysound { private var _connection:NetConnection; private var _netStream:NetStream; private var _filePath:String; private var _client:Object; public function MainDocument(filePath:String):void { _filePath = filePath; connect(); } private function connect():void { _connection=new NetConnection(); _connection.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler); _connection.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler); _connection.connect(null); } private function netStatusHandler(event:NetStatusEvent):void { switch (event.info.code) { case "NetConnection.Connect.Success": requestAudio(); break; } } private function requestAudio():void { _netStream=new NetStream(_connection); _netStream.addEventListener(NetStatusEvent.NET_STATUS, this._netStatusHandler); _netStream.addEventListener(AsyncErrorEvent.ASYNC_ERROR, this._asyncErrorHandler); _client = new Object(); _client.onMetaData = onMetaData; _netStream.client = _client; _netStream.backBufferTime = 0; _netStream.bufferTime = 0.5; _netStream.bufferTimeMax = 5; _netStream.play(filePath); } private function asyncErrorHandler(event:AsyncErrorEvent):void { trace(event); } private function onMetaData(metadata:Object):void { var str:String = ""; for (var key:String in metadata) { str += key + ": " + metadata[key]; } trace(str); } } } 

它适用于我在模拟器上，但它不在设备（iPad）上。 我发现设备上的netStatusHandler捕获状态“NetStream.Play.Failed”，但我不知道为什么，我知道它正确地读取文件，因为它获得正确的元数据，它也开始缓冲声音，但无法播放它。 文件位于我的应用程序swf旁边的文件夹中，因此它不是沙盒问题。 还有什么我应该尝试让它工作？