[Mplayer-cvslog] CVS: main/TOOLS calcbpp.pl,NONE,1.1 countquant.pl,NONE,1.1

[Arpi of Ize]

Update of /cvsroot/mplayer/main/TOOLS
In directory mail:/var/tmp.root/cvs-serv1395

Added Files:
	calcbpp.pl countquant.pl 
Log Message:
scripts mentioned by DOCS/tech/encoding-tips.txt
written by Moritz Bunkus


--- NEW FILE ---
#!/usr/bin/perl -w

use POSIX;

sub round {
  my $v = shift;
  
  return floor($v + 0.5) != floor($v) ?
    floor($v + 0.5) :
    floor($v);
}

if (scalar(@ARGV) < 4) {
  print("Please provide a) the cropped but unscaled resolution (e.g. " .
        "716x524), b) the aspect ratio (either 4/3 or 16/9 for most DVDs), " .
        "c) the video bitrate in kbps (e.g. 800) and d) the movie's fps.\n");
  exit(1);
}

($unscaled_width, $unscaled_height) = split('x', $ARGV[0]);.$encoded_at = $ARGV[1];.if ($encoded_at =~ /\//) {.  my @a = split(/\//, $encoded_at);.  $encoded_at = $a[0] / $a[1];.}.$scaled_width = $unscaled_width * ($encoded_at / (5/4));.$scaled_height = $unscaled_height;.$picture_ar = $scaled_width / $scaled_height;.($bps, $fps) = @ARGV[2, 3];..printf("Prescaled picture: %dx%d, AR %.2f\n", $scaled_width, $scaled_height,.       $picture_ar);.for ($width = 720; $width >= 320; $width -= 16) {.  $height = 16 * round($width / $picture_ar / 16);.  $diff = round($width / $picture_ar - $height);.  $new_ar = $width / $height;.  $picture_ar_error = abs(100 - $picture_ar / $new_ar * 100);.  printf("${width}x${height}, diff % 3d, new AR %.2f, AR error %.2f%% " ..         "scale=%d:%d bpp: %.3f\n", $diff, $new_ar, $picture_ar_error, $width,.         $height, ($bps * 1000) / ($width * $height * $fps));.}.


--- NEW FILE ---
#!/usr/bin/perl -w

sub display_quants {
  $frames = 0;
  foreach $key (sort(keys(%quants))) {
    $frames += $quants{$key};
  }
  foreach $key (sort({ $a <=> $b } keys(%quants))) {
    printf("q=%d:\t% 6d, % 6.2f%%\n", $key, $quants{$key}, $quants{$key} *
           100 / $frames);
  }
  print("$lines lines processed, $frames frames found\n");
  printf("average quant. is: %f\n", $quant_total/$frames);
}

$lines = 0;
$thislines = 0;
$quant_total = 0;

while (<STDIN>) {
  $lines++;
  $thislines++;
  if (/ q:([0-9]+) /) {
    $quants{$1}++;
  } elsif (/ q:(([0-9]+)\.[0-9]+) /) {
    $quants{$2}++;
    $quant_total += $1;
  }
  if ((scalar(@ARGV) > 0) && ($thislines > $ARGV[0])) {
    display_quants();
    $thislines = 0;
  }
}

display_quants();