Created
May 9, 2018 13:27
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Drop every second frame from GIF image
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| #!/bin/bash | |
| # Drop every second frame from GIF image, | |
| # using the same process as https://ezgif.com/optimize | |
| # | |
| # usage: | |
| # frame_drop.sh in.gif out.gif | |
| numframes=`gifsicle $1 -I | grep -P "\d+ images" --only-matching | grep -P "\d+" --only-matching` | |
| frames=`expr $numframes - 1` | |
| convert $1 -coalesce $2.tmp.gif | |
| gifsicle $2.tmp.gif --delete `seq -f "#%g" 0 2 $frames` -O2 -o $2 | |
| rm $2.tmp.gif |
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