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From Mien Software:
DropMedia Deinterlace is an easy to use tool where you drop folders and/or files onto the program to batch deinterlace the images. The original image files are never never modified; if you drop a folder, a similar folder with a new name will be created with all the images deinterlaced. This allows you to easily deinterlace as many images as you like at once with a touch of a button.