Media file conversion Using FFMPEG & C#

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Diagnostics;
using SharpFFmpeg;
using System.IO;
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
     
        using (System.Diagnostics.Process p = new System.Diagnostics.Process())
        {
            string exepath;
            string AppPath = Request.PhysicalApplicationPath;
            string  inputPath = AppPath + "Source";
            string outputPath = AppPath + "Destination";
            //Get the application path
            exepath = AppPath + "ffmpeg.exe";
            string fileName = "Bear.wmv";
            string videoSource = Page.MapPath("Bear.wmv");
            string VideoTarget = Page.MapPath("") + "\\video.flv";
            string cmd = " -i \"" + inputPath + "\\" + fileName + "\" \"" + outputPath + "\\" + fileName.Remove(fileName.IndexOf(".")) + ".avi" + "\"";
            string strCommand = Page.MapPath("ffmpeg.exe");
   // to covert into jpeg file
// string imgargs = " -i \"" + inputPath + "\\" + fileName.Remove(fileName.IndexOf(".")) + ".wmv" + "\" -f image2 -ss 1 -vframes 1 -s 280x200 -an \"" + outputPath + "\\" + fileName.Remove(fileName.IndexOf(".")) + ".jpg" + "\"";
            string imgargs = " -i \"" + inputPath + "\\" + fileName.Remove(fileName.IndexOf(".")) + ".wmv" + "\"  -ar 22050 -ab 32 -f flv \"" + outputPath + "\\" + fileName.Remove(fileName.IndexOf(".")) + ".flv" + "\"";
           
            string strArguments = "-i " + videoSource + VideoTarget ;
            p.StartInfo.FileName = exepath;
            p.StartInfo.Arguments = imgargs;
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.RedirectStandardOutput = false;
            p.StartInfo.CreateNoWindow = true;
            p.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            p.Start();
            p.WaitForExit(50 * 1000);


        }
    }
}