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