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tools/dvd2concat: generate VOBSUB extradata

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The extradata contains the frame size of the subtitles images
and the palette.
This commit is contained in:
Nicolas George 2021-08-31 19:37:09 +02:00
parent 94aa7e8a76
commit 8f92a1862a
1 changed files with 22 additions and 0 deletions
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22
tools/dvd2concat
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@ -94,6 +94,28 @@ for my $subp (@{$track->{subp}}) {
$concat .= "\nstream\nexact_stream_id " . $subp->{streamid} . "\n";
$concat .= "stream_codec dvd_subtitle\n";
$concat .= "stream_meta language " . $subp->{langcode} . "\n" if $subp->{langcode};
my $extradata = "";
if ($track->{width} && $track->{height}) {
$extradata .= "size: " . $track->{width} . "x" . $track->{height} . "\n";
}
if (my $pal = $track->{palette}) {
my @pal;
for my $c (@$pal) {
# Adapted from mplayer/sub/vobsub.c
my $y = ((hex($c) >> 16) & 0xFF);
my $u = ((hex($c) >> 8) & 0xFF) - 128;
my $v = ((hex($c) >> 0) & 0xFF) - 128;
my ($r, $g, $b) = map { int($_ < 0 ? 0 : $_ > 255 ? 255 : $_) }
$y + 1.4022 * $u,
$y - 0.3456 * $u - 0.7145 * $v,
$y + 1.7710 * $v;
push @pal, sprintf "%06x", ($r << 16) | ($g << 8) | $b;
}
$extradata .= "palette: " . join(", ", @pal) . "\n";
}
if ($extradata ne "") {
$concat .= "stream_extradata " . unpack("H*", $extradata);
}
}
my $chap_time = 0;
for my $chap (@{$track->{chapter}}) {