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#!/usr/bin/env perl
# Copyright (c) 2014 Nicolas George
#
# This file is part of FFmpeg.
#
# FFmpeg is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# FFmpeg is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
=head1 NAME
dvd2concat - create a concat script for a DVD title
=head1 SYNOPSIS
tools/dvd2concat I<path/to/dvd/structure> > I<file.concat>
=head1 DESCRIPTION
This script uses B<lsdvd> to produce concat script for a DVD title.
The resulting script can be used to play the DVD using B<ffplay>, to
transcode it using B<ffmpeg> or any other similar use.
I<path/to/dvd/structure> is the path to the DVD structure hierarchy; it
normally contains a directory named B<VIDEO_TS>. It must not be encrypted
with CSS.
I<file.concat> is the output file. It can be used a input to ffmpeg.
It will require the B<-safe 0> option.
=cut
use strict;
use warnings;
use Getopt::Long ":config" => "require_order";
use Pod::Usage;
my $title;
GetOptions (
"help|usage|?|h" => sub { pod2usage({ -verbose => 1, -exitval => 0 }) },
"manpage|m" => sub { pod2usage({ -verbose => 2, -exitval => 0 }) },
"title|t=i" => \$title,
) and @ARGV == 1 or pod2usage({ -verbose => 1, -exitval => 1 });
my ($path) = @ARGV;
my $lsdvd_message =
"Make sure your lsdvd version has the two following patches applied:\n" .
"http://sourceforge.net/p/lsdvd/feature-requests/1/\n" .
"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=603826\n";
my $lsdvd = do {
open my $l, "-|", "lsdvd", "-Op", "-x", $path
or die "You need to install lsdvd for this script to work.\n$lsdvd_message";
local $/;
<$l>;
};
my %lsdvd = eval $lsdvd;
die $@ if $@;
if (!defined $title) {
$title = $lsdvd{longest_track};
warn "Using longest title $title\n";
}
my $track = $lsdvd{track}[$title - 1]
or die "Title $title does not exist (1-", scalar(@{$lsdvd{track}}), ")\n";
my $vts_base = sprintf "%s/VIDEO_TS/VTS_%02d_", $path, $track->{vts};
my @frag;
for my $i (1 .. 9) {
my $file = sprintf "%s%d.VOB", $vts_base, $i;
my $size = -s $file or last;
push @frag, { file => $file, size => $size >> 11 };
}
my $concat = "ffconcat version 1.0\n";
$concat .= "\nstream\nexact_stream_id 0x1E0\n";
for my $audio (@{$track->{audio}}) {
$concat .= "\nstream\nexact_stream_id " . $audio->{streamid} . "\n";
}
for my $subp (@{$track->{subp}}) {
$concat .= "\nstream\nexact_stream_id " . $subp->{streamid} . "\n";
}
for my $cell (@{$track->{cell}}) {
my $off = $cell->{first_sector};
die "Your lsdvd version does not print cell sectors.\n$lsdvd_message"
unless defined $off;
my $size = $cell->{last_sector} + 1 - $cell->{first_sector};
my $frag = 0;
while ($frag < @frag) {
last if $off < $frag[$frag]->{size};
$off -= $frag[$frag++]->{size};
}
die "Cell beyond VOB data\n" unless $frag < @frag;
my $cur_off = $off;
my $cur_size = $size;
my @files;
while ($cur_size > $frag[$frag]->{size} - $cur_off) {
push @files, $frag[$frag]->{file};
$cur_size -= $frag[$frag]->{size} - $cur_off;
$cur_off = 0;
die "Cell end beyond VOB data\n" unless ++$frag < @frag;
}
push @files, $frag[$frag]->{file};
my $file = @files == 1 ? $files[0] : "concat:" . join("|", @files);
my $start = $off << 11;
my $end = ($off + $size) << 11;
$file = "subfile,,start,${start},end,${end},,:$file";
my $dur = int(1000 * $cell->{length});
$concat .= sprintf "\nfile '%s'\nduration %02d:%02d:%02d.%03d\n", $file,
int($dur / 3600000), int($dur / 60000) % 60, int($dur / 1000) % 60,
$dur % 1000;
}
print $concat;
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