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 );


        }
    }
}