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Change speed

Forum|Forum|4 years ago
November 16, 2021
5 replies
5267 views

Hi all, i'm trying to change speed to a 3d null object by rotating position and scale together. The problem is that my path also changes, why? Can you help me understand?

How to

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Correct answer thepixelsmith

I believe it is the spatial interpolation of the Position keyframes that is causing this.

Highlight your position keyframes on the Timeline.
Right–click on one of the selected keyframes and choose Keyframe Interpolation from the menu.
In the dialog, set Spacial Interpolation to Linear.
Click OK to close the dialog.

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axelvAuthor

Known Participant

Arrrrgghhhhhh! Same problem! In this example, when there is zoom in, the movement goes down and then ends up in the correct position. Why is it going down ??? Even setting “Spacial Interpolation” to “Linear”, same thing.

Example.zip

Andrew Yoole

Inspiring

As before, we need to see the speed graphs of the animated properties, but also would be great to see the whole timeline and preview window, with the end position keyframe selected so we can see the motion path. This looks to me like a bezier curve error on your motion path.

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axelvAuthor

Known Participant

Can these two screenshots help?

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axelvAuthor

Known Participant

Here I am with a huge delay.

I am attaching a .aep file where you understand what I mean. When the red square returns to the top it should zoom in but instead makes a small unwanted movement upwards as soon as the zoom starts. Why???

Example.zip

thepixelsmith

Correct answer

Community Expert

I believe it is the spatial interpolation of the Position keyframes that is causing this.

Highlight your position keyframes on the Timeline.
Right–click on one of the selected keyframes and choose Keyframe Interpolation from the menu.
In the dialog, set Spacial Interpolation to Linear.
Click OK to close the dialog.

A

axelvAuthor

Known Participant

Perfect thank you very much!

This change, however, is enough to make it on the second-last "position" keyframe, right?

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axelvAuthor

Known Participant

Hi, this is an example. You can see when start zoom in the path isn't flowing, it has a slight upward shift.

https://www.dropbox.com/s/dcajvzffgxqr7mo/Registrazione%20schermo%202021-11-19%20alle%2010.37.44.mov?dl=0

Mrtn Ritter

Participating Frequently

I see the shift and I think it's because the eases of the individual properties are slightly different.

*Martin

R

Rick Gerard

Community Expert

If you want to change the timing of a position animation editing the speed graph is the way to go. It is nearly impossible to get predictable results for position editing the value graph. Changing the timing changes when the move happens but it should not change the motion path. Throw scale into the mix and the path may look different because scale works around the Anchor Point. Without seeing the motion path in your screenshot, it is impossible for me to know what is going on.

Maybe this tutorial I produced will help you understand editing timing with the speed graph.

Mrtn Ritter

Participating Frequently

Can you share some screenshots and the properties you want to change? Your description is hard to understand.

If you have a perfectly created animation and you just want to adjust it's speed without touching the keyframes again (because they are already perfect), you can always precompose your work and use time remap to adjust the speed.

*Martin