This isn't yt related, but I thought most of you would benefit from this. I usually use Quicktime Pro (v7) to make movies. I got tired of manually opening up the images and saving them, so I found that Applescript can easily automate this. It's pretty straightforward, and you can make a shell or python script that writes the Applescript and executes it.
Here's an example Applescript
To run it, type "osascript script_name.applescript".
Here's an example Python routine that makes the script and runs it.
Unfortunately this doesn't work with the new QuickTime Player in Snow Leopard because they removed the image sequence loader for some reason. I had to reinstall the old QT from the Optional Installs in the install DVD.