Hi. I've searched through but i still can't find answers, maybe I don't know what's the right keyword to find. Anyway, how do you apply a colour correction at a certain time? Something like maybe at a middle of the fottage, I want to apply colour correct 'level' or 'exposure' cause some of my footage, it's somehow bright and it goes dark. So i wanna edit those to make it a smooth look. Can i use the 'Position'? How do i do this? Any tutorials or tips? Thanks!
This video from the _After Effects CS5: Learn By Video_ series shows how to combine motion tracking and rotoscoping to isolate and selectively color-correct an actor's face:
This demonstrates how to apply an effect so that it just affects a specific portion of the layer.
Andrew Kramer provides a video tutorial on his Video Copilot website in which he shows how to use an adjustment layer to apply an effect to only a short duration and to only specific portions of a movie.
If you are new to After Effects, I strongly recommend that you begin at the beginning and work your way methodically through the getting-started resources: