#!/usr/bin/env python

import os
import sys
from subprocess import Popen, PIPE
import getopt
import re

opts, args = getopt.getopt(sys.argv[1:], 'alt:m:')

_all = False
_list = False
_titlenumber = 0
_minsize = 0
for opt, val in opts:
    if opt == '-a':
        _all = True
    elif opt == '-l':
        _list = True
    elif opt == '-t':
        _titlenumber = val
    elif opt == '-m':
        _minsize = int(val)

if (not _list and len(args) != 1) or (not _all and not _list and _titlenumber == 0):
    sys.stderr.write('''Usage: %s [-l|-a|-t tn] [-m minsize] <name>
    -l          List titles
    -a          rip all titles
    -t tn       rip title number <titlenumber>
    -m minsize  remove produced files less than minsize
    <name>      DVD name
''' % sys.argv[0])
    sys.exit(2)

p = Popen(['vobcopy', '-I', '-i', '/dev/dvd'], stderr=PIPE)
vobcopy_out = p.communicate()[1]

if _list:
    for line in vobcopy_out.split('\n'):
        if re.search(r'Title\s\d+\shas.*chapter', line):
            sys.stdout.write(line + '\n')
    sys.exit(0)

titles = []
if _all:
    for line in vobcopy_out.split('\n'):
        m = re.search(r'Title\s(\d+)\shas.*chapter', line)
        if m is not None:
            titles.append(m.group(1))
else:
    titles.append(_titlenumber)

dvdname = args[0]
try:
    os.makedirs(dvdname)
except:
    pass
for tn in titles:
    ofname = '%s/title%s.avi' % (dvdname, tn)
    Popen(['mencoder', 'dvd://%s' % tn, '-ovc', 'lavc',
        '-af', 'volnorm=1', '-alang', 'en', '-oac', 'mp3lame',
        '-lameopts', 'cbr:preset=128',
        '-lavcopts', 'threads=4:vbitrate=2000:v4mv:vhq:vcodec=mpeg4',
        '-vf', 'pp=de,scale=720:-2', '-nosub', '-forceidx',
        '-o', ofname]).wait()
    if _minsize != 0:
        size = os.stat(ofname).st_size
        if size < _minsize:
            os.unlink(ofname)