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Bug in after effects with key frames?

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Olly Lawer
Bug in after effects with key frames?
on Jul 3, 2012 at 4:09:51 pm

I've noticed this before, but this time thought I'd post.

I've got 4 keyframes. All easy ease. I want the two middle keyframes to be adjusted so that the camera slowly pans out (a little slower than the first two keyframes). This on a Null object camera rig.

So I adjust the Z position. This has the desired effect, but then I start getting movement on the Y postion. No other keyframes exist. I try deleting the third keyframe and pasting the 2nd keyframe in its place and then I start getting some weird movements on the Z position - the Z position shouldn't move at all as i've just pasted the same value as the 2nd keyframe so between the 2nd and 3rd keyframe it should be still right?

Olly Lawer


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Dave LaRonde
Re: Bug in after effects with key frames?
on Jul 3, 2012 at 5:25:34 pm

Look up the Aharon Rabinowitz AE tutorial about the Boomerang Effect. Don't worry if it's not your version; this stuff hasn't changed in years.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Olly Lawer
Re: Bug in after effects with key frames?
on Jul 10, 2012 at 1:19:13 pm

Brilliant - thank you!

Olly Lawer


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Olly Lawer
Re: Bug in after effects with key frames?
on Jul 10, 2012 at 1:58:35 pm

Hmm, looked at the tutorial. Hold keyframes won't work in this instance.

Basically, working in 3D, I am animating an object close to camera.

3 keyframes.

Keyframes 1 & 2 - very slow pan out in z space (only animating z space)
Keyframes 2 & 3 - very fast pan out in z space

The trouble I am getting is that whatever I try, inbetween keyframes 1 & 2 I am getting zooming IN before I get zooming out. Can't hold keyframe as this won't give me the effect I am after.

The X and Y co-ordinates are animating too although I have not asked them too.

It doesn't matter if I use linear keyframes or not. Same effect.

Olly Lawer


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Dave LaRonde
Re: Bug in after effects with key frames?
on Jul 10, 2012 at 2:20:09 pm

[Olly Lawer] "The trouble I am getting is that whatever I try, inbetween keyframes 1 & 2 I am getting zooming IN before I get zooming out."

That's because you need to adjust the Bezier handle of the position keyframe. Look at the tutorial(s) I mentioned to see how it's done.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Olly Lawer
Re: Bug in after effects with key frames?
on Jul 10, 2012 at 2:21:15 pm

Hi,

OK will check out. The tutorial I found only mentioned hold keyframes, so will look further.

Thank you!

Olly Lawer


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