[Andrew Jehan]

I have been having this exact same problem and it is driving me absolutely bonkers. Just like with you, it is happening in a composition that I brought in to After Effects from a Premiere sequence.

After Effects is clearly acting bizarrely in relation to these clips. Nothing I do can eliminate the problem. When I add a new adjustment layer above the affected frame(s), it changes which frame is wrong, but the problem remains.

I am just about ready to encode out the Premiere sequence and import the file into After Effects.

[Andrew Jehan]

What’s the value of the lo-res reference QT if you have the actual edit with the real clips from the AAF import?

[Andrew Jehan]

I’m not sure what keyboard you have, but check here:

https://www.logickeyboard.com/shop/mac-keyboards-965c1.html

[Andrew Jehan]

I also was inspired by Mac’s Photo Booth ability to key people onto other backgrounds. There are certain situations in which the ability to do this in after effects would be tremendously useful – situations in which keyframing a mask would be prohibitively time consuming.

It’s pretty crazy that a little consumer program can produce an effect in real time, without rendering, that After Effects can’t do even with time to render.