How use asp.net get video duration

Question

    using Microsoft.DirectX.AudioVideoPlayback;

    Video vvideo = new Video(FileUpload.FileName.ToString());
    StringBuilder sb = new StringBuilder();
    sb.Append(duration.toString());
    error message;

“Installed an access attempt was made to the application domain.”

“vvideo” instance is created error msj ://

But down found cods I found a working code in c #. but asp.net does not work

string file1 = "c://ds.mpeg"
    IMediaPosition m_objMediaPosition = null;
    FilgraphManager m_objFilterGraph = new FilgraphManager();
    m_objFilterGraph.RenderFile(filename);
    m_objMediaPosition = m_objFilterGraph as IMediaPosition;

    int s = (int)m_objMediaPosition.Duration;
    int h = s / 3600;
    int m = (s - (h * 3600)) / 60;
    s = s - (h * 3600 + m * 60);

I DON'T TAKE VIDEO DURATION BOYS :/

Answer 1

I maked to ffmpeg friends

Answer 2

I make Function everywhere it uses ;)

 public string f_VideoDuration((add path)parameters)
        {

            try
            {

                string sInputVideo = Page.MapPath(add path);

                string sPath = " -i " + sInputVideo ;

                Process ffmepg = new Process();
                ffmepg.StartInfo.FileName = (Server.MapPath(ffmpeg.exe"));
                ffmepg.StartInfo.UseShellExecute = false;
                ffmepg.StartInfo.RedirectStandardOutput = true;
                ffmepg.StartInfo.RedirectStandardError = true;
                ffmepg.StartInfo.CreateNoWindow = true;
                ffmepg.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                ffmepg.StartInfo.Arguments = sPath;
                ffmepg.EnableRaisingEvents = true;
                ffmepg.Start();
                string sDuration = ffmepg.StandardError.ReadToEnd().ToString();
                ffmepg.Close();
                ffmepg.Dispose();
                sDuration = sDuration.Remove(0, sDuration.LastIndexOf("Duration: ") + 10);
                sDuration = sDuration.Substring(0, sDuration.IndexOf(","));
                return sDuration;
            }
            catch (Exception ex)
            {
                throw (ex);
            }
        }