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#!/usr/bin/perl -w |
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# frames.pl |
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# |
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# 07/19/07 18:06:13 CEST Dobrica Pavlinusic <dpavlin@rot13.org> |
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use strict; |
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use GD; |
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use File::Path; |
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use Getopt::Long; |
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my $tmp = '/tmp/frames'; |
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my $out = '/tmp/frames.avi'; |
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my $jpeg_q = 100; |
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my $repeat = 1; |
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my $vary_jpeg_q = 0; |
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$repeat = 16; |
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my $audio = '-i /tmp/test-pcm.wav'; |
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GetOptions( |
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"jpeg-q=i" => \$jpeg_q, |
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"repeat=i" => \$repeat, |
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); |
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rmtree $tmp if -e $tmp; |
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mkpath $tmp || die "can't create $tmp: $!"; |
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my $im = new GD::Image( 160, 120 ); |
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my $im_col; |
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sub col { |
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my $hex = shift; |
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$hex = lc($hex); |
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die "not hex: $hex" unless ( $hex =~ m/^([0-9a-f])([0-9a-f])([0-9a-f])$/i ); |
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my ( $r,$g,$b ) = ( hex($1 . $1),hex($2 . $2),hex($3 . $3) ); |
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if ( ! defined( $im_col->{$hex} ) ) { |
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my $col = $im->colorAllocate( $r, $g, $b ); |
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warn "creating color $col $hex\n"; |
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$im_col->{$hex} = $col; |
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} |
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return $im_col->{$hex}; |
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} |
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my @cols = ( |
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'fff', |
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'000', |
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'f00', |
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'000', |
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'0f0', |
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'000', |
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'00f', |
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'000', |
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'ff0', |
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'000', |
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'0ff', |
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'000', |
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'fff', |
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); |
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my $frame = 1; |
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sub save_jpeg { |
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my ( $path, $q ) = @_; |
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open(my $fh, '>', $path ) || die "can't open $path: $!"; |
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print $fh $im->jpeg( $q ) || die "can't save picture $path: $!"; |
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close($fh) || die "can't close picture $path: $!"; |
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} |
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foreach my $c ( @cols ) { |
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foreach ( 1 .. $repeat ) { |
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$im->fill(50,50, col($c) ); |
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my $path = sprintf('%s/%03d.jpg', $tmp, $frame); |
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save_jpeg( $path, $jpeg_q ); |
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if ( $vary_jpeg_q ) { |
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foreach my $q ( 1 .. 100 ) { |
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my $path = sprintf('%s/%03d-q%03d.jpg', $tmp, $frame, $q ); |
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save_jpeg( $path, $q ); |
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} |
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} |
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warn "frame $frame $jpeg_q% ", -s $path, " bytes\n"; |
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$frame++; |
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} |
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} |
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my $cmd = "ffmpeg -i $tmp/%03d.jpg $audio -r 16 -vcodec mjpeg -acodec adpcm_ms -ar 22050 -y $out"; |
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warn "## $cmd\n"; |
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system($cmd) == 0 or die "encoding failed: $?"; |
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#rmdir $tmp || die "can't remove $tmp: $!"; |
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warn "created $out ", -s $out, " bytes\n"; |
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