I'm brand new to After Effects and already struggling with a weird problem.
I'm trying to get rid of a flashing red light of a 2nd camera in my footage, it comes up every couple of seconds for 4 frames. So I set the Clone tool to Custom, set the duration to 4 frames and since I want to clone in time set the source time shift -6 frames to be on the safe side.
For some reason the clone tool works only one or two frames and then the red light comes up again ;((((
Then I close start the whole project from the beginning and now the duration works but my brush is always square and covers only right lower quarter of the light.
I'm completely clueless why. What do I do wrong?