Private Sub BackgroundWorker1_DoWork(ByVal sender As System.Object, ByVal e As _
  System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
        Dim FFmpeg As New Process()
        FFmpeg.StartInfo.FileName = "C:\Users\CD\Documents\Visual Studio" & _
          "2008\Projects\Test\bin\Debug\ff.exe"
 
        Dim input As String = "C:\Users\CD\Desktop\Neuer Ordner\test.mp4"
        Dim outputfolder As String = "C:\Users\CD\Desktop\Neuer Ordner\"
        Dim bitrate As Integer = 128
 
        FFmpeg.StartInfo.Arguments = " -i """ + input + """ -f mp3 -ab " + CStr( _
          bitrate) + "k -acodec libmp3lame """ + Path.Combine(outputfolder, _
          Path.GetFileNameWithoutExtension(input) + ".mp3") + """"
        FFmpeg.Start()
    End Sub