A little AppleScript can go a long way, especially once you know
how to save export settings from the QuickTime (Pro) Player.
Combine that with some folder actions or an Automator droplet (or just the command line), and you can make your own video processing robot.
To learn to use AppleScript (give it a few hours, there’s more of a learning curve than Apple lets on), see the AppleScript Overview
Here’s an example folder action: