Flickering Transitions – Adobe After Effects Tutorial

Want to make things flicker in after effects… well there are many way to make that happen. Keyframes, effects, and expressions. This is less of a tutorial and more of a lesson on all the ways you can do the same damn thing in this program. Really there’s no wrong way… unless you’re talking about doing something completely wrong. Actually there is for sure wrong ways to do things.

Anyway, here is the expression we use in here, it’s a doosey…

amp = 50; //MUST BE 50! Governs the height of the wave
freq = 10; //waves per second… kind of.
t=time-marker.nearestKey(time).time; // time based on the marker

x=amp*Math.cos(freq*t*t)+50; // makes the wave

if (time>thisLayer.marker.key(1).time) {100} else {
if (x>50) 100 else 0} // turn the effect on at the marker, and limit the expression

I hope that helps. But if it’s not clear, ask me questions in the comments zone and I’ll try to answer them.

Download this project file:

This project file for this will work in Adobe CS6 and newer (12.2) and WILL NOT work in older versions.

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  • Larry Johnson

    26.04.2016 at 16:25 Reply

    I watch your tutorials and always end up LMFAO!! Thank you for both the knowledge and the deadpan humor…

  • Peter Solomon

    24.10.2016 at 20:22 Reply

    I second Larry Johnson’s comment. Evan Abrams, you are a complex ruminating beastie. I appreciate your self effacing tutorials may not be to everyone’s taste or understanding, but I think you are an original personality in what can be a dull, matter-of-fact motion graphic world. Long may you live, work and share your knowledge and humour.

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