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ubermajestix/slack_gif_shrinker.sh

Created April 23, 2016 22:28
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Imagemagick Commands to shrink gif dimensions and file size to fit Slack's emoji policy (128x128 and 64k max)
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slack_gif_shrinker.sh
# Recommended in docs to build a new gif from the source
for f in *.gif; do convert "$f" -coalesce ${f%gif}coal.gif; done
# Resize to 128x128. All images were the same size
for f in *.coal.gif; do convert -size 512x512 "$f" -resize 128x128 ${f%gif}small.gif; done
# This worked pretty well to get most of these gifs under 64k to upload to Slack
for f in *.small.gif; do convert "$f" -colors 32 -dither none -deconstruct -layers optimize ${f%small.gif}opt.gif; done
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