Gifsicle is a command-line tool for creating, editing, and getting information about GIF images and animations.
# Resize animated gif by scaling down 50%: gifsicle --scale 0.5 -i animation.gif > animation-smaller.gif # Resize animated gif to scaling to a given width with unspecified height: gifsicle --resize-fit-width 300 -i animation.gif > animation-300px.gif # Resize animated gif by scaling to a given height with unspecified width: gifsicle --resize-fit-height 100 -i animation.gif > animation-100px.gif # Resize animated gif clipping to size: gifsicle --resize 300x200 -i animation.gif > animation-clipped.gif # Gifsicle has three types of GIF optimization to choose from: # -O1 - stores only the changed portion of each image. this is the default. # -O2 - also uses transparency to shrink the file further. # -O3 - try several optimization methods (usually slower, sometimes better results). # - http://davidwalsh.name/optimize-gifs gifsicle -O3 animation.gif -o animation-optimized.gif # --- # To optimise a GIF: gifsicle --batch --optimize=3 <amin.gif> # To make a GIF animation with gifsicle: gifsicle --delay=<10> --loop *.gif > <anim.gif> # To extract frames from an animation: gifsicle <anim.gif> '#0' > <firstframe.gif> # To you can also edit animations by replacing, deleting, or inserting frames: gifsicle -b <anim.gif> --replace '#0' <new.gif>