Do you mean like a batch convert of all files in a dir perchance? Img2pixel can already do this.

Load a preset or tweak any image to your liking then choose your input dir with images you want to convert to those settings. Setting your output-dir will automatically apply those settings and save them to the output-dir.

@Laerte Junior - adding on to @xaGe, you could probably find a tool to split a video into multiple images. Or convert the video to gif, and then split using Python or any other tool.