Simple Video Out
A small application that lets you play out any QT movie (any size or res) even MPEG4 through firewire into, say, a DV camera or through that into a TV set.
Go to ...
[
developer.apple.com]
Download the sample. Unstuff. In the folder dig till you find an app "SimpleVideoOut"
That's the guy.
There's also source code so you can build it yourself with modifications (presumably)
Disclaimer: This information is a bit of paraphrase. Couldn't be bothered rewriting in all my own words