Convert jp2.zip archives to CBZ archives.

jp2zip2cbz.sh

#!/bin/bash
# Convert an achive of zipped JP2 files to a CBZ archive.
# Must have ImageMagick with the JP2 extensions enabled.

set -ex

# Get our arguments, and unzip the file.
input="$1"
input_dir=$(dirname "$input")
input_basename=$(basename "$input")
cd "$input_dir"
unzip "$input_basename" -d "$input_basename".tmp
cd "$input_basename".tmp

# Convert all files to jgg.
for file in */*.jp2; do
    jpg="${file%.jp2}.jpg"
    convert "$file" "$jpg"
    rm "$file"
done

# Zip all the subdirectories.
for dir in *; do
    zip -qr "$dir".zip "$dir"
    mv "$dir".zip "$dir".cbz
done

# Move all the cbz files upwards and remove the tmp directory.
cd ..
for cbz in "$input_basename".tmp/*.cbz; do
    basename=$(basename "$cbz")
    mv "$cbz" "$basename"
done
rm -r "$input_basename".tmp