--- frames.pl	2007/07/19 17:09:18	1
+++ frames.pl	2007/07/21 15:02:51	18
@@ -8,10 +8,19 @@
 
 use GD;
 use File::Path;
+use Getopt::Long;
 
 my $tmp = '/tmp/frames';
 my $out = '/tmp/frames.avi';
+my $jpeg_q = 100;
+my $repeat = 1;
 
+GetOptions(
+	"jpeg-q=i" => \$jpeg_q,
+	"repeat=i" => \$repeat,
+);
+
+rmtree $tmp if -e $tmp;
 mkpath $tmp || die "can't create $tmp: $!";
 
 my $im = new GD::Image( 160, 120 );
@@ -32,29 +41,49 @@
 }
 
 my @cols = (
+	'fff',
 	'000',
 	'f00',
+	'000',
 	'0f0',
+	'000',
 	'00f',
+	'000',
 	'ff0',
+	'000',
 	'0ff',
+	'000',
 	'fff',
 );
 
 my $frame = 1;
 
+sub save_jpeg {
+	my ( $path, $q ) = @_;
+	open(my $fh, '>', $path ) || die "can't open $path: $!";
+	print $fh $im->jpeg( $q ) || die "can't save picture $path: $!";
+	close($fh) || die "can't close picture $path: $!";
+}
+
 foreach my $c ( @cols ) {
-	foreach ( 1 .. 16 ) {
+	foreach ( 1 .. $repeat ) {
 		$im->fill(50,50, col($c) );
-		warn "frame $frame\n";
-		my $path = sprintf('%s/%03d.jpg', $tmp, $frame++);
-		open(my $fh, '>', $path) || die "can't open $path: $!";
-		print $fh $im->jpeg(100) || die "can't save picture $path: $!";
-		close($fh) || die "can't close picture $path: $!";
+		my $path = sprintf('%s/%03d.jpg', $tmp, $frame);
+		save_jpeg( $path, $jpeg_q );
+
+		foreach my $q ( 1 .. 100 ) {
+			my $path = sprintf('%s/%03d-q%03d.jpg', $tmp, $frame, $q );
+			save_jpeg( $path, $q );
+		}
+		warn "frame $frame $jpeg_q% ", -s $path, " bytes\n";
+		$frame++;
 	}
 }
 
-system("ffmpeg -i $tmp/%03d.jpg -r 16 -vcodec copy -y $out") == 0 or
-	die "encoding failed: $?";
+my $cmd = "ffmpeg -i $tmp/%03d.jpg -r 16 -y $out";
+warn "## $cmd\n";
+system($cmd) == 0 or die "encoding failed: $?";
+
+#rmdir $tmp || die "can't remove $tmp: $!";
 
-rmdir $tmp || die "can't remove $tmp: $!";
+warn "created $out ", -s $out, " bytes\n";