How-to limit effects to apply only to part of a timeline???
Start with a video which includes a brief pan that includes a troublesome, overly bright or oddly colored elements within, say, a wall window showing the outside scene.
OK. Use the qualifier to select that window with respect to HSL. OK. Use color wheels to make desired changes to the HSL selected bits. This also may unavoidably capture other elements in the frame.
OK. Use a mask to restrict the qualifier to a limited spatial area.
OK. The troublesome window now looks acceptable and the color changes are contained with that window.
So far so good.
But later in the timeline, these window, qualifier and color wheel adjustments show unintended side effects.
OK. Just limit the temporal scope of these effects–the qualifier, the power window/mask and the color adjustments–to that short bit of the timeline.
BUT HOW??? (Gotta happen every day for a professional and there probably is a keyword or name for this.)
Razor-blade that short bit in the edit timeline??? Surely there is a smarter way.
I have tried static keyframes as begin and end markers: then turn off the mask within that keyframe.
OK. That may limit some but not all of the effects, such as color wheel adjustment.