I used to be able to take screencasts with QuickTime just fine for over a year now. But suddenly, every time I try and go above 3 or 4 minutes, by the time I finish, QuickTime just freezes. I can only kill it. When opening it the next time, it presents to me only part of the recording.
What could possibly cause this?
I got Yosemite v10.10.5 and QuickTime v10.4 (build 833.7)