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1#!/usr/bin/env perl
2
3# Copyright (c) 2014 Nicolas George
4#
5# This file is part of FFmpeg.
6#
7# FFmpeg is free software; you can redistribute it and/or
8# modify it under the terms of the GNU Lesser General Public License
9# as published by the Free Software Foundation; either
10# version 2.1 of the License, or (at your option) any later version.
11#
12# FFmpeg is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU Lesser General Public License for more details.
16#
17# You should have received a copy of the GNU Lesser General Public License
18# along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
19# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
21=head1 NAME
22
23dvd2concat - create a concat script for a DVD title
24
25=head1 SYNOPSIS
26
27tools/dvd2concat I<path/to/dvd/structure> > I<file.concat>
28
29=head1 DESCRIPTION
30
31This script uses B<lsdvd> to produce concat script for a DVD title.
32The resulting script can be used to play the DVD using B<ffplay>, to
33transcode it using B<ffmpeg> or any other similar use.
34
35I<path/to/dvd/structure> is the path to the DVD structure hierarchy; it
36normally contains a directory named B<VIDEO_TS>. It must not be encrypted
37with CSS.
38
39I<file.concat> is the output file. It can be used as an input to ffmpeg.
40It will require the B<-safe 0> option.
41
42=cut
43
44use strict;
45use warnings;
46use Getopt::Long ":config" => "require_order";
47use Pod::Usage;
48
49my $title;
50
51GetOptions (
52  "help|usage|?|h" => sub { pod2usage({ -verbose => 1, -exitval => 0 }) },
53  "manpage|m"      => sub { pod2usage({ -verbose => 2, -exitval => 0 }) },
54  "title|t=i"      => \$title,
55) and @ARGV == 1 or pod2usage({ -verbose => 1, -exitval => 1 });
56my ($path) = @ARGV;
57
58my $lsdvd_message =
59"Make sure your lsdvd version has the two following patches applied:\n" .
60"http://sourceforge.net/p/lsdvd/feature-requests/1/\n" .
61"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=603826\n";
62
63my $lsdvd = do {
64  open my $l, "-|", "lsdvd", "-Op", "-x", $path
65    or die "You need to install lsdvd for this script to work.\n$lsdvd_message";
66  local $/;
67  <$l>;
68};
69my %lsdvd = eval $lsdvd;
70die $@ if $@;
71
72if (!defined $title) {
73  $title = $lsdvd{longest_track};
74  warn "Using longest title $title\n";
75}
76my $track = $lsdvd{track}[$title - 1]
77  or die "Title $title does not exist (1-", scalar(@{$lsdvd{track}}), ")\n";
78my $vts_base = sprintf "%s/VIDEO_TS/VTS_%02d_", $path, $track->{vts};
79my @frag;
80for my $i (1 .. 9) {
81  my $file = sprintf "%s%d.VOB", $vts_base, $i;
82  my $size = -s $file or last;
83  push @frag, { file => $file, size => $size >> 11 };
84}
85
86my $concat = "ffconcat version 1.0\n";
87$concat .= "\nstream\nexact_stream_id 0x1E0\n";
88for my $audio (@{$track->{audio}}) {
89  $concat .= "\nstream\nexact_stream_id " . $audio->{streamid} . "\n";
90}
91for my $subp (@{$track->{subp}}) {
92  $concat .= "\nstream\nexact_stream_id " . $subp->{streamid} . "\n";
93}
94for my $cell (@{$track->{cell}}) {
95  my $off = $cell->{first_sector};
96  die "Your lsdvd version does not print cell sectors.\n$lsdvd_message"
97    unless defined $off;
98  my $size = $cell->{last_sector} + 1 - $cell->{first_sector};
99
100  my $frag = 0;
101  while ($frag < @frag) {
102    last if $off < $frag[$frag]->{size};
103    $off -= $frag[$frag++]->{size};
104  }
105  die "Cell beyond VOB data\n" unless $frag < @frag;
106  my $cur_off = $off;
107  my $cur_size = $size;
108  my @files;
109  while ($cur_size > $frag[$frag]->{size} - $cur_off) {
110    push @files, $frag[$frag]->{file};
111    $cur_size -= $frag[$frag]->{size} - $cur_off;
112    $cur_off = 0;
113    die "Cell end beyond VOB data\n" unless ++$frag < @frag;
114  }
115  push @files, $frag[$frag]->{file};
116  my $file = @files == 1 ? $files[0] : "concat:" . join("|", @files);
117  my $start = $off << 11;
118  my $end = ($off + $size) << 11;
119  $file = "subfile,,start,${start},end,${end},,:$file";
120
121  my $dur = int(1000 * $cell->{length});
122  $concat .= sprintf "\nfile '%s'\nduration %02d:%02d:%02d.%03d\n", $file,
123    int($dur / 3600000), int($dur / 60000) % 60, int($dur / 1000) % 60,
124    $dur % 1000;
125}
126
127print $concat;
128