jpegify.py

#!python
# coding=utf-8
#
# usage: python jpegify.py *.pdf
#
# Written for Python 2 or python 3

from __future__ import print_function

import os
import sys
import subprocess
import glob

if 'GSPATH' in os.environ:
    gspath = os.environ['GSPATH']
else:
    gspath = os.path.join(os.environ['PROGRAMFILES'], r'gs\gs9.18\bin\gswin4')

print("gs is at {}".format(gspath))

if __name__ == '__main__':
    print("Time to convert some PDFs")
    
    if len(sys.argv) != 2:
        print("Usage: {} *.pdf".format(sys.argv[0]))
        sys.exit(1)
    if not os.path.exists(gspath):
        print("Ghostscript not found at {}, set GSPATH in environment".format(gspath))
        sys.exit(1)
        
    print("Examining {} paths for PDFs".format(len(sys.argv[1:])))

    pdfs = []
    for arg in sys.argv[1:]:
        newpdfs = glob.glob(arg)
        print("Found {} new PDFs at path {}".format(len(newpdfs), arg))
        pdfs.extend(newpdfs)

    for pdf in pdfs:
        try:
            print("Processing PDF {}".format(pdf))
            subprocess.check_call([
                    gspath, '-dNOPAUSE', '-dBATCH', '-sDEVICE=jpeg', '-r300',
                    '-dJPEGQ=90', '-o', r'{}-%00d.jpg'.format(pdf),
                    pdf
                ])
        except subprocess.CalledProcessError as ex:
            print("Failed to process file {}: {}, skipping".format(pdf, ex))