Question: In the past, some of my projects have required me to create a movie version of a fullscreen Flash application. The easiest way to do this has been to get a screen capture. However, capturing anything over 1024x768 has resulted in choppy video, which is unacceptable. I understand that there are hardware based solutions for capturing fullscreen video, but I have not been able to find out what these are. My output needs to be scalable up to 1920x1080 and result in an uncompressed AVI file with no choppy-ness.

Answer: 
Various professional products support full HD capture:

<http://www.decklink.com/products/hd/>

<http://www.aja.com/>

There are others. Capturing the full, uncompressed digital or analog stream is a pretty heavy requirement.

-Adam
With a bit of luck your graphic adapter already has a analog video output. You could hook up a dvd recorder and just digitze the video signal on a stand alone hardware box.

That won't give you 1920x1080 though.

If you really need to get captures higher than dvd resolution you need professional (and *incredible* expensive) video capture equipment.

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Btw - if you want to capture 1920x1080 in true color at 30 frames per second uncompressed you have to somehow store around **237 megabytes per second**. Just to give you an idea how much data you have to deal with...