comic2cbz - convert images to webp at 50% quality and create cbz (comicbook archive)"

comic2cbz

#!/usr/bin/env bash
# AUTHOR: gotbletu (@gmail|twitter|youtube|github|lbry)

helpmsg() {
  printf "%s\n" "desc: convert images to webp at 50% quality and create cbz (comicbook archive)"
  printf "%s\n" "depend: imagemagick zip coreutils libwebp"
  printf "\n"
  printf "%s\n" "usage: ${0##*/} <image>"
  printf "\n"
  printf "%s\n" "  $ ${0##*/} *.png"
  printf "%s\n" "  $ ${0##*/} *.jpg"
  printf "%s\n" "  $ ${0##*/} *"
}
if [ $# -lt 1 ]; then
  helpmsg
  exit 1
elif [ "$1" = -h ] || [ "$1" = --help ]; then
  helpmsg
  exit 0
else
myArray=( "$@" )
DIR="$(basename "$PWD")"
mkdir -vp "$DIR"
for arg in "${myArray[@]}"; do
     convert -quality 50 "$arg" "$DIR/${arg%.*}.webp"
     # cwebp -quiet -q 50 -mt "$arg" -o "$DIR/${arg%.*}.webp"
  done
  zip -r "${DIR}.cbz" "$DIR"
fi

# imagemagick external requirements
# convert -list delegate

# https://unix.stackexchange.com/a/602196/430298
# https://comicbookplus.com/forum/?topic=18332.0
# http://tomeko.net/software/CbxConverter/index.php?lang=en
# https://resource.dopus.com/t/comic-book-cbx-to-cbx-convert-resize-v1-50/24719
# https://developers.google.com/speed/webp/docs/cwebp

# Note: resizing image resolution causes blur, not sharp like the OG, so avoid doing it until we fine a better way
# myArray=( "$@" )
# DIR="$(basename "$PWD")"
# mkdir -vp "$DIR"
# for arg in "${myArray[@]}"; do
  # width="$(identify -format '%w' "$arg")" # 1920
  # height="$(identify -format '%h' "$arg")" # 1080
  # if [[ "$height" -gt 1080 ]]; then
     # convert -quality 50 -resize x1080 "$arg" "$DIR/${arg%.*}.webp"
     # convert -quality 50 -geometry x1080 "$arg" "$DIR/${arg%.*}.webp"
     # cwebp -q 75 -resize 0 1080 -mt "$arg" -o "$DIR/${arg%.*}".webp
  # elif [[ "$width" -gt 1920 ]]; then
     # convert -quality 50 -resize 1920x "$arg" "$DIR/${arg%.*}.webp"
     # convert -quality 50 -geometry 1920x "$arg" "$DIR/${arg%.*}.webp"
     # cwebp -q 75 -resize 1920 0 -mt "$arg" -o "$DIR/${arg%.*}".webp
  # else
     # convert -quality 75 "$arg" "$DIR/${arg%.*}.webp"
     # cwebp -q 75 -mt "$arg" -o "$DIR/${arg%.*}".webp
  # fi
  # done
#   zip -r "${DIR}.cbz" "$DIR"
# fi