mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 07:42:17 +00:00
ccf116f7ab
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8477 b3059339-0415-0410-9bf9-f77b7e298cf2
46 lines
1.4 KiB
Raku
Executable File
46 lines
1.4 KiB
Raku
Executable File
#!/usr/bin/perl -w
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use POSIX;
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sub round {
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my $v = shift;
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return floor($v + 0.5) != floor($v) ?
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floor($v + 0.5) :
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floor($v);
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}
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$raw_aspect = 720/576;
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if (scalar(@ARGV) < 4) {
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print("Please provide a) the cropped but unscaled resolution (e.g. " .
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"716x524), b) the aspect ratio (either 4/3 or 16/9 for most DVDs), " .
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"c) the video bitrate in kbps (e.g. 800) and d) the movie's fps.\n");
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print("If your DVD is not encoded at 720x576 then change the \$raw_aspect" .
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"variable at the beginning of this script.\n");
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exit(1);
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}
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($unscaled_width, $unscaled_height) = split('x', $ARGV[0]);
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$encoded_at = $ARGV[1];
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if ($encoded_at =~ /\//) {
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my @a = split(/\//, $encoded_at);
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$encoded_at = $a[0] / $a[1];
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}
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$scaled_width = $unscaled_width * ($encoded_at / ($raw_aspect));
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$scaled_height = $unscaled_height;
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$picture_ar = $scaled_width / $scaled_height;
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($bps, $fps) = @ARGV[2, 3];
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printf("Prescaled picture: %dx%d, AR %.2f\n", $scaled_width, $scaled_height,
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$picture_ar);
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for ($width = 720; $width >= 320; $width -= 16) {
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$height = 16 * round($width / $picture_ar / 16);
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$diff = round($width / $picture_ar - $height);
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$new_ar = $width / $height;
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$picture_ar_error = abs(100 - $picture_ar / $new_ar * 100);
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printf("${width}x${height}, diff % 3d, new AR %.2f, AR error %.2f%% " .
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"scale=%d:%d bpp: %.3f\n", $diff, $new_ar, $picture_ar_error, $width,
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$height, ($bps * 1000) / ($width * $height * $fps));
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}
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