Mad182 · May 9, 2018 13:27
diff --git a/frame_drop.sh b/frame_drop.sh
 #!/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
	#!/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