/[amv]/frames.pl
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Revision 2 - (show annotations)
Thu Jul 19 20:17:06 2007 UTC (16 years, 11 months ago) by dpavlin
File MIME type: text/plain
File size: 1246 byte(s)
configurable jpeq quality
1 #!/usr/bin/perl -w
2
3 # frames.pl
4 #
5 # 07/19/07 18:06:13 CEST Dobrica Pavlinusic <dpavlin@rot13.org>
6
7 use strict;
8
9 use GD;
10 use File::Path;
11
12 my $tmp = '/tmp/frames';
13 my $out = '/tmp/frames.avi';
14 my $jpeg_q = 10;
15
16 mkpath $tmp || die "can't create $tmp: $!";
17
18 my $im = new GD::Image( 160, 120 );
19
20 my $im_col;
21
22 sub col {
23 my $hex = shift;
24 $hex = lc($hex);
25 die "not hex: $hex" unless ( $hex =~ m/^([0-9a-f])([0-9a-f])([0-9a-f])$/i );
26 my ( $r,$g,$b ) = ( hex($1 . $1),hex($2 . $2),hex($3 . $3) );
27 if ( ! defined( $im_col->{$hex} ) ) {
28 my $col = $im->colorAllocate( $r, $g, $b );
29 warn "creating color $col $hex\n";
30 $im_col->{$hex} = $col;
31 }
32 return $im_col->{$hex};
33 }
34
35 my @cols = (
36 '000',
37 'f00',
38 '0f0',
39 '00f',
40 'ff0',
41 '0ff',
42 'fff',
43 );
44
45 my $frame = 1;
46
47 foreach my $c ( @cols ) {
48 foreach ( 1 .. 16 ) {
49 $im->fill(50,50, col($c) );
50 warn "frame $frame\n";
51 my $path = sprintf('%s/%03d.jpg', $tmp, $frame++);
52 open(my $fh, '>', $path) || die "can't open $path: $!";
53 print $fh $im->jpeg( $jpeg_q ) || die "can't save picture $path: $!";
54 close($fh) || die "can't close picture $path: $!";
55 }
56 }
57
58 system("ffmpeg -i $tmp/%03d.jpg -r 16 -vcodec copy -y $out") == 0 or
59 die "encoding failed: $?";
60
61 rmdir $tmp || die "can't remove $tmp: $!";

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