Gifsicle

Gifsicle is a command-line tool for creating, editing, and getting information about GIF images and animations. Making a GIF animation with gifsicle is easy: % gifsicle --delay=10 --loop *.gif > anim.gif Extracting frames from animations is easy too: % gifsicle anim.gif `#0` > firstframe.gif You can also edit animations by replacing, deleting, or inserting frames: % gifsicle -b anim.gif --replace `#0` new.gif Some more gifsicle features: * Batch mode for changing GIFs in place. * Prints detailed information about GIFs, including comments. * Control over interlacing, comments, looping, transparency... * Creates well-behaved GIFs: removes redundant colors, only uses local color tables if it absolutely has to (local color tables waste space and can cause viewing Artifacts), etc. * It can shrink colormaps and change images to use the Web-safe palette (or any Colormap you choose). * Optimize your animations! This stores only the changed portion of each Frame, and can radically shrink your GIFs. You can also use transparency to make them even smaller. Gifsicle