Changing brightness gradually over a period of time

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Hi, I'm trying to darken a scene gradually, at the start it should be normal and then until the end of the video the brightness should slowly decrease. Unfortunately I can't find a way to do this, could anyone help me?

[Jqke · Accepted solution]

There are multiple ways to do this. Just grab any color correction effect (Exposure, Curves, Brightness & Contrast, etc.), add a keyframe, add another keyframe somewhere down the timeline, and adjust the effect to be darker. For the Curves you can adjust settings with a lot more variety.