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cronnelly/image-analyse

Created October 23, 2012 19:30
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Find PNGs which should be re-encoded to JPG
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image-analyse
find . -type f -iname "*.png" -print0 | while read -d $'\0' fn; do os=$(stat -c%s "$fn"); js=$(gm convert -quality 80 "$fn" jpg:- | wc -c); ratio=$(echo "scale=3; ($js * 100) / $os" | bc); echo "$ratio% $js $os $fn"; done | sort -n
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