I am trying to use the “activated” state of the “custom” lifetime of a shape in a “roto”.
If I correctly understand the tooltip, there is a way to activate a shape between two keyframes, and to deactivate it between two other keyframes. For example, this would be very useful to switch off the blurring of a face when the person is temporary screened by something in the foreground or is off frame.
But whatever I tried, I was unable to get this behavior : the shape is permanently activated or not activated without any relation with the keyframes.
Can somebody give me a clue ?