GIF libraries for Go

• image/gif in the standard library reads and writes GIF, including animation: gif.DecodeAll returns every frame as an *image.Paletted with delays, disposal methods and the loop count, and gif.EncodeAll writes them back. Frames are raw (not composited). Encoding an RGB image maps it to the fixed Plan 9 palette with Floyd-Steinberg dithering unless you pass your own quantizer.

For resizing and other processing of the frames, imaging and golang.org/x/image/draw work on the decoded images. For higher-quality palettes, use a quantizer package such as ericpauley/go-quantize (BSD-3-Clause, median cut), which plugs into gif.Options.Quantizer.

• image/gif Go's standard image/gif package reads and writes GIF and animated GIF. How to decode all frames with delays, composite them, create a looping animation.