--- frames.pl	2007/07/20 16:02:14	10
+++ frames.pl	2007/07/20 16:54:52	12
@@ -58,8 +58,9 @@
 	}
 }
 
-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: $!";