protected void Upload_Click(object sender, EventArgs e)
{
//File Uploads to Server
Thread t1 = new Thread(
unused => compressVideo(Video_Path, Final_Path,User_id)
);
t1.Start();
}

public static void compressVideo(string Video_Path, string Final_Path,string UID)
{
    var ffMpeg = new NReco.VideoConverter.FFMpegConverter();
    ffMpeg2.ConvertProgress += (o, args) =>
        {
            //SignalR calls.Doing this to update the ui
        };

    ffMpeg.ConvertMedia(Video_Path, Final_Path, NReco.VideoConverter.Format.mp4);
    File.Delete(Video_Path);
    _waitHandle.Set();
}

ffMpeg.ConvertMedia(Video_Path, Final_Path, NReco.VideoConverter.Format.mp4);