AForge.Video.DirectShow.VideoCaptureDevice.GetPinCapabilitiesAndConfigureSizeAndRate C# (CSharp) Method

        private void GetPinCapabilitiesAndConfigureSizeAndRate( ICaptureGraphBuilder2 graphBuilder, IBaseFilter baseFilter,
            Guid pinCategory, Size size, int frameRate, ref VideoCapabilities[] capabilities )
        {
            object streamConfigObject;
            graphBuilder.FindInterface( pinCategory, MediaType.Video, baseFilter, typeof( IAMStreamConfig ).GUID, out streamConfigObject );

            if ( streamConfigObject != null )
            {
                IAMStreamConfig streamConfig = null;

                try
                {
                    streamConfig = (IAMStreamConfig) streamConfigObject;
                }
                catch ( InvalidCastException )
                {
                }

                if ( streamConfig != null )
                {
                    if ( capabilities == null )
                    {
                        try
                        {
                            // get all video capabilities
                            capabilities = AForge.Video.DirectShow.VideoCapabilities.FromStreamConfig( streamConfig );
                        }
                        catch
                        {
                        }
                    }

                    // check if it is required to change capture settings
                    if ( ( frameRate != 0 ) || ( ( size.Width != 0 ) && ( size.Height != 0 ) ) )
                    {
                        SetFrameSizeAndRate( streamConfig, size, frameRate );
                    }
                }
            }

            // if failed resolving capabilities, then just create empty capabilities array,
            // so we don't try again
            if ( capabilities == null )
            {
                capabilities = new VideoCapabilities[0];
            }
        }