2021-04-21 17:49:30 +00:00
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#!/bin/sh
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2021-12-16 22:04:50 +00:00
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# Lossy image compression using ImageMagick
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# Tries to eliminate artifacts
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2021-04-21 17:49:30 +00:00
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while true
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2021-12-16 22:04:50 +00:00
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do case $1 in
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(-o) out="$2"; shift 2;;
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(-q) quality="$2"; shift 2;;
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(*) break;;
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esac
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2021-04-21 17:49:30 +00:00
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done
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2021-12-16 22:04:50 +00:00
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out="${out:-$1-shrinked.jpg}"
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2021-11-25 12:57:02 +00:00
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test $# -eq 0 && echo "Usage: $0 [-q quality (default 85)] [-o outfile] <images...>" && exit 1
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2021-12-16 22:04:50 +00:00
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magick "$@" -auto-orient -strip -interlace Plane -define jpeg:dct-method=float -sampling-factor 4:2:0 -gaussian-blur 0.05 \
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-quality "${quality:-85}" "$out"
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printf "Shrinked $1(%s) to $out(%s) - reduced to %s%%\n" \
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$(stat --format "%s" IMG_20211124_115930.jpg IMG_20211124_115930.jpg-shrinked.jpg | numfmt --to=iec-i --suffix=B) \
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$(stat --format %s "$out" "$1" | sed 'N;s|\n|*100/|' | bc)
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