如何使用OSMF处理NetStatusEvents

Question

我正在开发一个使用OSMF库的视频播放器。我有一个问题，我有时会失去与服务器的连接。因此，我设置了一个对象来监视到服务器的连接，在连接断开的情况下，它在放弃连接之前尝试重新连接有限的次数。一切都很好，除了我在调试版播放器上得到的消息：

错误#2044:未处理的NetStatusEvent：。level=error，code=NetStream.Play.StreamNotFound

我确实有一个继承自HTTPStreamingNetLoader的对象，它覆盖processFinishLoading方法，获取netStream并侦听网络状态事件。如下所示：

override protected function processFinishLoading(loadTrait:NetStreamLoadTrait):void
   {    
            netStream = loadTrait.netStream as HTTPNetStream;
            netStream.addEventListener(NetStatusEvent.NET_STATUS, onNetStatus);
    ...
    }

但我还是得到了错误。onNetStatus方法获取NETSTREAM_BUFFER_EMPTY、NETSTREAM_BUFFER_FULL或NETSTREAM_PLAY_START等事件，但不获取NETSTREAM_PLAY_STREAMNOTFOUND事件。您知道如何处理这些事件吗？谢谢。

Answer 1

stream.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandle

public function netStatusHandler(e:NetStatusEvent):void{
  switch (e.info.code){
    case "NetStream.Seek.InvalidTime":
        trace('seek was to far')
      break;
    case "NetStream.Play.StreamNotFound":
        trace("Unable to locate video");
      break;
  }
} 

Answer 2

您可以从mediaElement获取它

mediaElement.addEventListener(MediaElementEvent.TRAIT_ADD, onTraitAdd);

然后,

private function onTraitAdd(event:MediaElementEvent):void
{
  trace(" [add]", event.toString()); 
  if (event.traitType == MediaTraitType.LOAD)
  {

    if (mediaElement.hasTrait(MediaTraitType.LOAD))
    {
      netStreamLoadTrait = mediaElement.getTrait(MediaTraitType.LOAD) as NetStreamLoadTrait;
      netStreamLoadTrait.addEventListener(LoadEvent.LOAD_STATE_CHANGE, onLoaded);

    }
  }
}


private function onLoaded(event:LoadEvent):void
{
  netStream = netStreamLoadTrait.netStream;
  netStream.addEventListener(NetStatusEvent.NET_STATUS, onNetStatus);
}

Answer 3

您可以监听MediaPlayer状态更改：

mediaPlayer.addEventListener( MediaPlayerStateChangeEvent.MEDIA_PLAYER_STATE_CHANGE, onMediaPlayerStateChange, false, 0, true);

..。

private function onMediaPlayerStateChange(e:MediaPlayerStateChangeEvent):void
{
    _mediaState = e.state;      

    switch (_mediaState) 
    {
        case MediaPlayerState.READY:                        
        break;

        case MediaPlayerState.BUFFERING:
        break;

        case MediaPlayerState.LOADING:
        break;

        case MediaPlayerState.PAUSED:
        break;  

        case MediaPlayerState.PLAYING:
        break;  

        case MediaPlayerState.PLAYBACK_ERROR:
        break;

        case MediaPlayerState.UNINITIALIZED:
        break;
    }
}