DScaler Deinterlace plugin usage

DScaler Deinterlace filter (1.2) is one of most popular DirectShow filters for deinterlace. You can use this filter in our SDK and configure it.

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1. We must define filter interface and used enumerations.

    /// <summary>
    /// DScaler deinterlace type.
    /// </summary>
    public enum DScalerDeinterlaceType
    {
        /// <summary>
        /// Weave.
        /// </summary>
        Weave = 1020,

        /// <summary>
        /// Bob.
        /// </summary>
        Bob = 1021,

        /// <summary>
        /// Two frame.
        /// </summary>
        TwoFrame = 1022,

        /// <summary>
        /// Blended clipping.
        /// </summary>
        BlendedClipping = 1023,

        /// <summary>
        /// Field bob.
        /// </summary>
        FieldBob = 1024,

        /// <summary>
        /// DScaler plugin.
        /// </summary>
        DScalerPlugin = 1025
    }

    /// <summary>
    /// DScaler Deinterlace filter 1.2 interface.
    /// </summary>
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("463D645C-48F7-11D4-8464-0008C782A257")]
    [ComImport, System.Security.SuppressUnmanagedCodeSecurity]
    public interface IDeinterlace
    {
        /// <summary>
        /// Gets or sets deinterlace type.
        /// </summary>
        [DispId(1)]
        int DeinterlaceType
        {
            [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] get;
            [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] set;
        }

        /// <summary>
        /// Gets or sets a value indicating whether odd field will be first.
        /// </summary>
        [DispId(2)]
        bool IsOddFieldFirst
        {
            [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] get;
            [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] set;
        }

        /// <summary>
        /// Gets or sets DScaler plugin name.
        /// </summary>
        [DispId(3)]
        string DScalerPluginName
        {
            [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
            get; [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] set;
        }
    }

2. Add OnFilterAdded event handler for SDK control. In our sample code we using Video Capture SDK .Net.

        private void VideoCapture1_OnFilterAdded(object sender, FilterEventArgs e)
        {
            if (e.Name.Contains("Deinterlace Filter"))
            {
                IDeinterlace deint = e.Filter as IDeinterlace;
                if (deint != null)
                {
                    deint.DeinterlaceType = (int)DScalerDeinterlaceType.Bob;
                    deint.IsOddFieldFirst = false;
                }
            }
        }

This event fired for each added filter. We're checking filter name and getting IDeinterlace filter interface. In our sample we changing deinterlace method to Bob.

​

Before Start method call you must add Deinterlace filter using the following code:

VideoCapture1.Video_Filters_Add(new VFCustomProcessingFilter("Deinterlace Filter"));