I try to convert jpg to wmv using window media encoder
SetInput of screenshot works well: SrcVid.SetInput("ScreenCap://ScreenCapture1", "", "");
When I change the SetInput to jpg
I am 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.)

                //get current folder
                string curentFolder = Directory.GetCurrentDirectory();
                // Create a WMEncoder object.
                WMEncoder Encoder = new WMEncoder();

                // Retrieve the source group collection.
                IWMEncSourceGroupCollection SrcGrpColl = Encoder.SourceGroupCollection;

                // Add a source group to the collection.
                IWMEncSourceGroup SrcGrp = SrcGrpColl.Add("SG_1");

                IWMEncVideoSource2 SrcVid = (IWMEncVideoSource2)SrcGrp.AddSource(WMENC_SOURCE_TYPE.WMENC_VIDEO);
                //SrcVid.SetInput("ScreenCap://ScreenCapture1", "", "");
                SrcVid.SetInput(@"C:\Users\jacoba\Videos\Untitled.jpg", "", ""); //Bitmap file (.bmp, .gif or .jpg file)

                // Crop 2 pixels from each edge of the video image.
                SrcVid.CroppingBottomMargin = 2;
                SrcVid.CroppingTopMargin = 2;
                SrcVid.CroppingLeftMargin = 2;
                SrcVid.CroppingRightMargin = 2;

                // Specify a file object in which to save encoded content.
                IWMEncFile File = Encoder.File;
                File.LocalFileName = curentFolder + @"\OutputFile.wmv";

                // Choose a profile from the collection.
                IWMEncProfileCollection ProColl = Encoder.ProfileCollection;
                IWMEncProfile Pro;
                for (int i = 0; i < ProColl.Count; i++)
                    Pro = ProColl.Item(i);
                    if (Pro.Name == "Windows Media Video 8 for Broadband (PAL, 700 Kbps)")  //"Screen Video/Audio High (CBR)"

                // Fill in the description object members.
                IWMEncDisplayInfo Descr = Encoder.DisplayInfo;
                Descr.Author = "Author name";
                Descr.Copyright = "Copyright information";
                Descr.Description = "Text description of encoded content";
                Descr.Rating = "Rating information";
                Descr.Title = "Title of encoded content";

                // Start the encoding process.
                // Wait until the encoding process stops before exiting the application.
                Console.WriteLine("Press Enter when the file has been encoded.");
                Console.ReadLine(); // Press Enter after the file has been encoded.
            catch (Exception e)