NZBGet extract subtitles

#!/usr/bin/env python
#
##############################################################################
### NZBGET POST-PROCESSING SCRIPT                                          ###

# Script to rip srt/ssa subtitles out of .mkv files
#
# Usage: scriptname.py [filename.mkv]
# If the filename isn't specified all .mkv files in the current directory will be processed
# Developed with ffmpeg 2.1.1, you probably want that or higher if this doesn't work
#

##############################################################################
### OPTIONS                                                                ###

### NZBGET POST-PROCESSING SCRIPT                                          ###
##############################################################################

import glob, re, argparse, os, sys
from subprocess import call

os.chdir(os.environ['NZBPP_DIRECTORY'])

# Exit codes used by NZBGet
POSTPROCESS_SUCCESS=93
POSTPROCESS_ERROR=94

ffmpeg = 'ffmpeg'

parser = argparse.ArgumentParser(description='Extract subtitles from mkv files.')
parser.add_argument('-f', '--file', help="source filename (mkv) to extract subtitle from")
args = parser.parse_args()

if args.file is None:
        mkvs = glob.glob("*.mkv")
        if (len(mkvs) == 0):
                print "No .mkv files in current directory"
        for i in mkvs:
        call ([ffmpeg, '-i', i, '-vn', '-an', '-map', '0:m:language:eng', re.sub(r".mkv", ".en.srt", i)])
        if os.path.exists(re.sub(r".mkv", ".en.srt", i)):
            if os.path.getsize(re.sub(r".mkv", ".en.srt", i)) < 1 * 1024:
                os.remove(re.sub(r".mkv", ".en.srt", i))
                print "Resultaat: Leeg bestand", (re.sub(r".mkv", ".en.srt", i)), "verwijderd, backup proces uitvoeren"
                call ([ffmpeg, '-i', i, '-vn', '-an', '-map', '0:s:0', re.sub(r".mkv", ".en.srt", i)])
                if os.path.exists(re.sub(r".mkv", ".en.srt", i)):
                    if os.path.getsize(re.sub(r".mkv", ".en.srt", i)) < 1 * 1024:
                        os.remove(re.sub(r".mkv", ".en.srt", i))
                        print "Resultaat: Leeg bestand backup proces", (re.sub(r".mkv", ".en.srt", i)), "verwijderd"
                    print "Resultaat: Ondertitel 1 naar", (re.sub(r".mkv", ".en.srt", i)), "gekopieerd, language tag kan fout zijn"
                call ([ffmpeg, '-i', i, '-vn', '-an', '-map', '0:s:1', re.sub(r".mkv", ".de.srt", i)])
                if os.path.exists(re.sub(r".mkv", ".de.srt", i)):
                    if os.path.getsize(re.sub(r".mkv", ".de.srt", i)) < 1 * 1024:
                        os.remove(re.sub(r".mkv", ".de.srt", i))
                        print "Resultaat: Leeg bestand backup proces", (re.sub(r".mkv", ".de.srt", i)), "verwijderd"
                    print "Resultaat: Ondertitel 2 naar", (re.sub(r".mkv", ".de.srt", i)), "gekopieerd, language tag kan fout zijn"
            elif os.path.getsize(re.sub(r".mkv", ".en.srt", i)) > 1 * 1024:
                 print "Resultaat: Engelse ondertitel naar", (re.sub(r".mkv", ".en.srt", i)), "gekopieerd"
        call ([ffmpeg, '-i', i, '-vn', '-an', '-map', '0:m:language:dut', re.sub(r".mkv", ".nl.srt", i)])
        if os.path.exists(re.sub(r".mkv", ".nl.srt", i)):
            if os.path.getsize(re.sub(r".mkv", ".nl.srt", i)) < 1 * 1024:
                os.remove(re.sub(r".mkv", ".nl.srt", i))
                print "Resultaat: Leeg bestand", (re.sub(r".mkv", ".nl.srt", i)), "verwijderd"
            print "Resultaat: Nederlandse ondertitel naar", (re.sub(r".mkv", ".nl.srt", i)), "gekopieerd"

else:
        call(process(args.file))

sys.exit(POSTPROCESS_SUCCESS)