ep.Param[0] = new EncoderParameter(encSave, (long)EncoderValue.MultiFrame);                 
              
                if (imgIn.PixelFormat == PixelFormat.Format1bppIndexed)
                {
                    ep.Param[1] = new EncoderParameter(encCompression, (long)EncoderValue.CompressionCCITT4);
                }
                else
                {
                    ep.Param[1] = new EncoderParameter(encCompression, (long)EncoderValue.CompressionLZW);
                }