silverlight – IIS启动时平滑流低质量

讨论在这里：http://smf.codeplex.com/discussions/271042@H_607_22@

这是我使用的代码：@H_607_22@

public MainPage() {
        InitializeComponent();
        player.MediaPluginRegistered += new EventHandler<CustomEventArgs<IMediaPlugin>>(player_MediaPluginRegistered);
        player.PlayStateChanged += new EventHandler<CustomEventArgs<MediaPluginState>>(Player_PlayStateChanged);
    }
private IAdaptiveMediaPlugin _adaptivePlugin = null;
private bool isStartupHeuristicsActive = false;

void player_MediaPluginRegistered(object sender,CustomEventArgs<IMediaPlugin> E) {
    var adaptivePlugin = e.Value as IAdaptiveMediaPlugin;
    if (adaptivePlugin == null) return; 
    if (_adaptivePlugin == null) _adaptivePlugin = adaptivePlugin;
    _adaptivePlugin.ManifestReady +=new Action<IAdaptiveMediaPlugin>(_adaptivePlugin_ManifestReady);
}

void  _adaptivePlugin_ManifestReady(IAdaptiveMediaPlugin obj)
{
    if (_adaptivePlugin != null)
    {
        var videoStream = _adaptivePlugin.CurrentSegment.SELEctedStreams.Where(i => i.Type == StreamType.Video).FirstOrDefault();

        if (videoStream != null)
        {
            var averageBitrate = videoStream.AvailableTracks.Average(t => t.bitratE);

            var track = videoStream.AvailableTracks.FirstOrDefault(t => t.bitrate >= averageBitratE);
            if (track != null)
            {
                isStartupHeuristicsActive = true;
                videoStream.SetSELEctedTracks(new[] { track });
            }
        }
    }
}

private void Player_PlayStateChanged(object sender,CustomEventArgs<MediaPluginState> E)
{
    if (isStartupHeuristicsActive && e.Value == MediaPluginState.Playing)
    {
        isStartupHeuristicsActive = false;
        if (_adaptivePlugin != null)
        {
            var videoStream = _adaptivePlugin.CurrentSegment.SELEctedStreams.Where(i => i.Type == StreamType.Video).FirstOrDefault();
            if (videoStream != null)
            {
                videoStream.SetSELEctedTracks(videoStream.AvailableTracks);
            }
        }
    }
}

谢谢@H_607_22@