ani2png is a Python script the converts Windows animated mouse cursor file (.ani) to a PNG file that usable with Mousecape.
Mousecape is a macOS utility that changes the mouse cursor. In Mousecape, a cursor theme/package is called a "cape". While there are many good "capes" out there, they are not as diverse and quirky like Windows cursors. For example this Bocchi the Rock! I purchased from bilibili.
This script converts Windows .ani files to PNGs that can be used with Mousecape.
Specifically, Mousecape expects as tall strip of image with each frame of the animation layed out just like a movie film.
This script does just that. And the output format is PNG.
ani2png.py <INPUT_PATH> -o <OUTPUT_PATH>