Camera zoom

Question

When I use zoom on the camera and apply a classic tween, it seems to end with a jolt. The Y value of the last frame before the keyframe has a very different value,  which causes this visual discomfort (example: Y=-60 in the last frame before keyframe, and Y=-64 in keyframe). How can I fiz this?

Mario_CR · Accepted Answer

There's a bug that's specially noticeable when using easing that makes the last keyframe slightly jolt in position. Happens when you move the 'end' keyframe repeatedly after applying a tween.

Report the bug from this link.

I suspect it's the same old bug that makes the Transformation Point drift away from the Registration Point after a while when moving a symbol. The built-in camera is nothing more than a modified Movie Clip under the hood; it must have a Transformation Point as well but apparently the devs didn't account for drifting.

In a regular symbol you can fix this by double clicking the Transformation Point and reset its position back to the Registration Point, however this is inaccessible on the camera.

The only workaround I've found is to add a keyframe on the second to last frame of a tween span and move it at the end to fix the last frame jolt. You can find a quick video demonstration of this below.

_keyframer · Answer

This is certainly a long-standing bug I do not miss at all since moving on to different animation software. It's been an issue for a long time. I used to extend the tween by inserting a frame, then click the 2nd to last frame and hit F6 (Add Keyframe). This sometimes worked for me on Mac.

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