converting block of jpg to wmv using window media encoder

Hi
I try to convert jpg to wmv using window media encoder
I running this code (contain single jpg for Trial) I get error
"System.Runtime.InteropServices.COMException (0xC00D0BB8): The input media format is invalid."
at line: SrcVid.SetInput(@"C:\Users\jacoba\Videos\Untitled.jpg", "", "");
any idea how to SetInput for jpg (or any others image - BMP, PNG etc.)

1. try
2.             {
3.                 //get current folder
4.                 string curentFolder = Directory.GetCurrentDirectory();
6.                 // Create a WMEncoder object.
7.                 WMEncoder Encoder = new WMEncoder();
9.                 // Retrieve the source group collection.
10.                 IWMEncSourceGroupCollection SrcGrpColl = Encoder.SourceGroupCollection;
12.                 // Add a source group to the collection.
13.                 IWMEncSourceGroup SrcGrp = SrcGrpColl.Add("SG_1");
16.                 IWMEncVideoSource2 SrcVid = (IWMEncVideoSource2)SrcGrp.AddSource(WMENC_SOURCE_TYPE.WMENC_VIDEO);
17.                 SrcVid.SetInput(@"C:\Users\jacoba\Videos\Untitled.jpg", "", ""); //Bitmap file (.bmp, .gif or .jpg file)
21.                 // Crop 2 pixels from each edge of the video image.
22.                 SrcVid.CroppingBottomMargin = 2;
23.                 SrcVid.CroppingTopMargin = 2;
24.                 SrcVid.CroppingLeftMargin = 2;
25.                 SrcVid.CroppingRightMargin = 2;
27.                 // Specify a file object in which to save encoded content.
28.                 IWMEncFile File = Encoder.File;
29.                 File.LocalFileName = curentFolder + @"\OutputFile.wmv";
31.                 // Choose a profile from the collection.
32.                 IWMEncProfileCollection ProColl = Encoder.ProfileCollection;
33.                 IWMEncProfile Pro;
34.                 for (int i = 0; i < ProColl.Count; i++)
35.                 {
36.                     Pro = ProColl.Item(i);
37.                     //Console.WriteLine(Pro.Name.ToString());
38.                     if (Pro.Name == "Windows Media Video 8 for Broadband (PAL, 700 Kbps)")  //"Screen Video/Audio High (CBR)"
39.                     {
40.                         SrcGrp.set_Profile(Pro);
41.                         break;
42.                     }
43.                 }
45.                 // Fill in the description object members.
46.                 IWMEncDisplayInfo Descr = Encoder.DisplayInfo;
47.                 Descr.Author = "Author name";
48.                 Descr.Copyright = "Copyright information";
49.                 Descr.Description = "Text description of encoded content";
50.                 Descr.Rating = "Rating information";
51.                 Descr.Title = "Title of encoded content";
53.                Encoder.PrepareToEncode(true);
54.                 Encoder.Start();
55.                 Console.WriteLine("Press Enter when the file has been encoded.");
56.                 Console.ReadLine(); // Press Enter after the file has been encoded.
57.             }
58.             catch (Exception e)
59.             {
60.                 Console.WriteLine(e.ToString());
61.                 Console.ReadLine();
62.             }