Same problem here; 5 minutes of captured video is creating a 113GB QuickTime file, then freezing up with a spinning rainbow cursor because my HD is out of space.
FinalCut Pro (4.5) will not force quit; Quicktime Player (7.4 (92), updated 1/16/2008) to take a peek at the enormous file, QuickTime Player is also non-responsive, and won’t force quit. Same story when I try to play the file in LiveType.
I tried capturing again with the QuickTime application file (32MB) in the trash; same problem.
I haven’t touched my capture settings; I have 109GB available on the external HD that I’m capturing to.
Any ideas? (Thanks in advance.) –domlet.