[Robin Dikovsky]

Hey,

After hours of working on my comp, i just render… and realise that all my transitions are f**cked up! And nothing shows in the preview, only when i render ! And after, again, hours of investigating why, why the hell is this happening to me, i just found that if i do the “convert expression to keyframes”, the problem appears in my preview screen…

i’m desperate right now, don’t know what to do. Any help would be much appreciated !

EDIT: whatever i do, i still have this glitch. I tried with the “exponential scale” tool, same problem, everything fine in preview then glitch when render. I’m stuck. Need an expert right now, may be a paid job !

[Robin Dikovsky]

Hi,
helpful for sure! I’ve done exactly what you said, and the result is now close to perfect.

Finally, I found the perfect expression to do this effect there:

https://www.motion-graphics-exchange.com/after-effects/Exponential-Scale-live-with-expressions/4a9394ff1bc59

Does exactly what i need. Fantastic !

However, i still don’t know why i get a sudden change in the shape of my composition; i made all the scales and positions by hand so i’m sure everything is correct, but i can’t get a proper loop because of that. the smallest video frames even change ratio !

Another thing is that i need a motion blur to happen as the movement is going super fast at the end, but because of the scaling going from 100 to 10% at each loop, i get some extreme motion blur at these particular frames which are killing the effect; i tried with cc force motion blur but still have the same problem. I thought then that i could render my comp and then apply some motion blur but there seems to be no footage motion blur effect integrated in AE 🙁

[Robin Dikovsky]

Hi,

thanks for the tutorials ! I’ll have a look on these. I already got more or less how to make it a seamless loop with the exponential scale tool (finally i remade the composition in after effects directly, took me some time but it’s perfect now).
However, I now have two problems :
the first one is that my comp is moving a few pixels at the loop point, i can correct this with position keyframing but i don’t know why it’s happening, but i guess i’m alone on this one 🙂 my anchor point is at the correct center, like if after effects was not completely pixel perfect in its scaling, which i doubt it is…

the other thing is that i don’t know how to animate the effect, now that it’s looping: I need to be able to increase/decrease the speed of the scaling with nice curves, without changing the speed of my movie (is that clear ? haha). Because the idea is to start with a single video and then slowly start the effect.

I still have to work on this, may be back with some advancements soon.