jpeg_comic_resize2cbz.sh

#!/bin/bash

# Reduces the size of oversized jpegs, optimizes them, and compresses them to a cbz format

# Set the output file based on the input directory
filename=$(basename "$PWD").cbz

# Resize the jpegs to 50% of their original dimensions.
# NOTE: THIS OVERWRITES THE EXISTING FILES!
echo '>>>>> RESIZING JPEGS >>>>>'
mogrify -monitor -resize 50% *.jpeg

# Optimize the resized images
# NOTE: THIS OVERWRITES THE EXISTING FILES!
echo '>>>>> OPTIMIZING JPEGS >>>>>'
jpegoptim -m 75 *.jpeg

# Gather the names of all the jpegs into a list and zip it
echo '>>>>> CREATING ZIP >>>>>'
ls *.jpeg > zip.lst
cat zip.lst | zip -@ "$filename" 

# Remove all files except for the cbz
rm zip.lst
rm *.jpeg

echo '>>>>> FILE CREATED >>>>>'

png_comic_crunch2cbz.sh

#!/bin/bash

# Converts limited color jpgs to pngs and compresses them to a cbz format

# Set the output file name based on the input directory
filename=$(basename "$PWD").cbz

# Convert all jpgs to pngs, limiting to 16 colors
for img in $(find . -iname '*.jpg'); do echo -n "Converting $img"; convert "$img" -colors 16 "${img%.*}.png" && echo ' [Done]'; done

# Remove the jpgs
echo '>>>>> REMOVING JPGs >>>>>' 
rm *.jpg 

# Compress the pngs
echo '>>>>> COMPRESSING PNGS >>>>>' 
crunch *.png 

# crunch creates files with original_file_nme-crunch.png
# Group these into a list of files to zip
ls *-crunch* > zip.lst
cat zip.lst | zip -@ "$filename" 

# Remove all files except for the cbz
rm zip.lst
rm *.png

echo '>>>>> FILE CREATED >>>>>'