GIF libraries for Ruby

• ruby-vips loads an animated GIF as one tall image with the frames stacked vertically, plus delay and loop metadata; operations like thumbnail resize all frames at once. Saving uses cgif with libimagequant (or quantizr) for good palettes, and it’s fast and memory-efficient.
• MiniMagick runs ImageMagick: -coalesce, -layers Optimize, -delay and -loop give full control over animations. Simple to use, slower, and memory-hungry for long animations.

Both need a native library installed (libvips or ImageMagick). Rails’ Active Storage can use either through the image_processing gem.

• MiniMagick MiniMagick wraps the ImageMagick command line for Ruby. How to read GIF frames and delays, resize an animated GIF, create a looping animation from images.
• ruby-vips ruby-vips reads and writes GIF and animated GIF through libvips. How to load all frames, read delays and loop count, resize an animated GIF.