wpf应用于广播视频,延迟15秒

Ano*_*han 5 c# wpf expression broadcasting video-streaming

我有一个使用Microsoft.expression.encoder和framework 4.0播放视频的WPF应用程序,但我在播放时有15秒的延迟.有任何建议减少广播时的延迟.

以下是守则

using Microsoft.Expression.Encoder.Live; 
using Microsoft.Expression.Encoder;

private void button1_Click(object sender, RoutedEventArgs e)
{ 
    try 
    { 
        EncoderDevice video = null; 
        EncoderDevice audio = null;
        GetSelectedVideoAndAudioDevices(out video, out audio);
        StopJob();

        if (video == null)
        {
            return;
        }

        StopJob();
        _job = new LiveJob();

        if (video != null && audio != null)
        {
            //StopJob();
            _deviceSource = null;
            _deviceSource = _job.AddDeviceSource(video, audio);
            _job.ActivateSource(_deviceSource);

            // Finds and applys a smooth streaming preset        
            //_job.ApplyPreset(LivePresets.VC1HighSpeedBroadband4x3);

            // Creates the publishing format for the job
            PullBroadcastPublishFormat format = new PullBroadcastPublishFormat();
            format.BroadcastPort = 9090;
            format.MaximumNumberOfConnections = 50;

            // Adds the publishing format to the job
            _job.PublishFormats.Add(format);

            // Starts encoding
            _job.StartEncoding();
        }
        //webCamCtrl.StartCapture();
    }
    catch (Exception ex)
    {
        WriteLogFile(this.GetType().Name, "button1_Click", ex.Message.ToString());
    }

}
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我正在使用MediaElement在我的服务器和客户端系统上显示网络摄像头.

在客户端

 try
            {

                theMainWindow.getServerIPAddress();
                IP = theMainWindow.machineIP;
                MediaElement1.Source = new Uri("http://" + IP + ":9090/");
            }
            catch (Exception ex)
            {
            }
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小智 2

不幸的是没有解决方案(至少截至 2011 年 1 月)。根据微软的说法:

“我们在编码过程中添加了几秒的延迟,然后在服务器级别进行缓存,可以再添加 5-20 秒,最后 Silverlight 还会再缓存几秒的延迟。”

http://social.expression.microsoft.com/Forums/is/encoder/thread/898b2659-c0d5-4c84-8fba-225f58806f5d