How do you gradually increase the opacity of a video clip?

[Marco Baer]

There are several ways to control opacity just like applying track envelope “Composite Level” or keyframing the alpha value of secondary color correction fx. But in your video example I can’t see any opacity variation. Are you sure you mean opacity?

[Harris Majeed]

If you look closely, you can see that the screen is slowly turning red in the video.

[Marco Baer]

Yes, but this is due to color modification, not opacity.

[Harris Majeed]

Oh i see, but how do i gradually modify the colour?

[László Kovács]

I’d experiment with color corrector first. Apply that FX to your clip, then animate it (using keyframes, you enable it by clicking the clocks beside the color wheels), so that you shift the colors towards red or orange.
Hope I could help 😉

[Harris Majeed]

Thanks , i’ll try that.