You could write a 3d animation program that exports avi files. That way you could have more detail than your video card can actually handle in each frame to render realtime. I would like to see some kind of easy 3d movie making software. not like maya or 3ds max, but something where you load premade models and do the animation. You would have less features and flexibility, but some end users might like to make 3d movies. microsoft released something like this a while back i believe called "3d movie maker". just an idea.

search out a program called HyperCam. that may help you.

God damn it!
Use the AVIFile API, and you are finished in 10 minutes, and you have your own capture function implementated...

well actually the best way would be to code an intermediate gl forwarding wrapper. means your own gl. and you log then all the commands you send to gl, including he data, into a file. then you run that file again to render the video. the power of this is easy: you can actually play realtime what you want to see in the movie afterwards. you can even play lowres and render highres:D

but the simple AVIapi is really easy to use..

"take a look around" - limp bizkit
www.google.com

If you get the source to KSnapshot(a free linux opensource program) at ftp://ftp.kde.org/pub/kde/ it should be somewere there or try searching www.kde.org. Get the source and you should be able to make your own movie. It may be portable to other OSs I havnt seen the source.