convert CBR to CBZ

readme.txt

Simple python script to convert CBR to CBZ files
Needed this as some CBR files can not be read by comic book readers on *nix systems

Need to install RarFile (https://rarfile.readthedocs.io/)  

Usage: cbr2cbz <cbr file> | <folder>
convert CBR file or all CBR files in a folder to CBZ format

cbr2cbz.py

#!/usr/bin/env python

import sys
import os
import shutil
import tempfile
import rarfile
import zipfile


def print_usage():
    usage="cbr2cbz A script utility to convert CBR files into CBZ files"
    usage+="\n Usage: cbr2cbz <cbr file> | <cbr folder>"
    print_err(usage)

#
def extract(filename, directory):
  '''
  Extract images from a CBR file into a directory
  '''
  with rarfile.RarFile(filename) as archive:
    archive.extractall(path=directory)


def compress (directory, filename):
  '''
  Compress a folder with images into a CBZ/ZIP file
  '''
  with zipfile.ZipFile(filename,mode='w',
                       compression=zipfile.ZIP_DEFLATED) as archive:
    for fn in os.listdir(directory):
      archive.write('{}/{}'.format(directory,fn),arcname=fn)

def convert(cbr_filename):
  '''
  Convert CBR file to CBZ, by extracting the RAR archive and 
  re-compressing to ZIP archive
  
  '''
  cbz_filename = '{}.cbz'.format(os.path.splitext(cbr_filename)[0])
  temp_dir=tempfile.mkdtemp("cbr2cbz")  # create temporary folder


  extract(cbr_filename, temp_dir)       # Extract images from CBR/RAR into tmp folder
  compress(temp_dir, cbz_filename)      # Compress images and put them into a CBZ/ZIP
  shutil.rmtree(temp_dir)               # remove temp fodler

if len(sys.argv)!=2:
  print_usage();
  sys.exit(-1)

cbr_filename = sys.argv[1]
if os.path.isfile(cbr_filename):
  print("Processing "+cbr_filename)
  convert(cbr_filename)
elif os.path.isdir(cbr_filename):
  for root, dirs, files in os.walk(cbr_filename):
    for fn in files:
      if fn.endswith('.cbr'):
        print("Processing "+fn)
        convert(os.path.join(root, fn))
else:
  print_usage();
  sys.exit(-1)