/[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 12 - (hide annotations)
Fri Jul 20 16:54:52 2007 UTC (16 years, 11 months ago) by dpavlin
File MIME type: text/plain
File size: 1376 byte(s)
don't copy video so we can change frame rate to 16
1 dpavlin 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 dpavlin 10 my $jpeg_q = 100;
15     my $repeat = 16;
16     $repeat = 1; # off
17 dpavlin 1
18 dpavlin 10 rmtree $tmp if -e $tmp;
19 dpavlin 1 mkpath $tmp || die "can't create $tmp: $!";
20    
21     my $im = new GD::Image( 160, 120 );
22    
23     my $im_col;
24    
25     sub col {
26     my $hex = shift;
27     $hex = lc($hex);
28     die "not hex: $hex" unless ( $hex =~ m/^([0-9a-f])([0-9a-f])([0-9a-f])$/i );
29     my ( $r,$g,$b ) = ( hex($1 . $1),hex($2 . $2),hex($3 . $3) );
30     if ( ! defined( $im_col->{$hex} ) ) {
31     my $col = $im->colorAllocate( $r, $g, $b );
32     warn "creating color $col $hex\n";
33     $im_col->{$hex} = $col;
34     }
35     return $im_col->{$hex};
36     }
37    
38     my @cols = (
39     '000',
40     'f00',
41     '0f0',
42     '00f',
43     'ff0',
44     '0ff',
45     'fff',
46     );
47    
48     my $frame = 1;
49    
50     foreach my $c ( @cols ) {
51 dpavlin 10 foreach ( 1 .. $repeat ) {
52 dpavlin 1 $im->fill(50,50, col($c) );
53     warn "frame $frame\n";
54     my $path = sprintf('%s/%03d.jpg', $tmp, $frame++);
55     open(my $fh, '>', $path) || die "can't open $path: $!";
56 dpavlin 2 print $fh $im->jpeg( $jpeg_q ) || die "can't save picture $path: $!";
57 dpavlin 1 close($fh) || die "can't close picture $path: $!";
58     }
59     }
60    
61 dpavlin 12 my $cmd = "ffmpeg -i $tmp/%03d.jpg -r 16 -y $out";
62     warn "## $cmd\n";
63     system($cmd) == 0 or die "encoding failed: $?";
64 dpavlin 1
65     rmdir $tmp || die "can't remove $tmp: $!";
66 dpavlin 10
67     warn "created $out ", -s $out, " bytes\n";

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