I need help from image editors. I have 348 images that are 1912x 792. I need them all to be resized and centered on a 3840x2160 black canvas. I've accomplished this manually, but it takes about 1min for every image:
Open image in paint.net, resize it to the width desired and auto height, open new layer, create desired canvas size, paint bucket black, copy resized image, paste onto canvas, manually drag to 'center', save as flattened image -- repeat
Yes this is on of twenty ways to do do this on paint.net, and there are likely 2 hundred OTHER ways to do it given the vast amount of image software out there. I'm trying to do this in bulk, quickly. I am poor - I have no premium/paid software, nor do I have Adobe knowledge (if Adobe is the answer). Please help!!!