-
Key frame boondoggle.
This comes up often enough in my AE work (about a year now) that I just need to ask point blank, but I don’t really know how to ask.
I put a key frame at 1 second, and I put another key frame at 2 seconds. Then a third key frame at 3 seconds and fourth at 4.
Key frame 2 and 3 are supposed to be Identical values and then 4 is the change.
But durn it, about about half way between 2 and 3 the value changes, and the imagery “floats” in a way I don’t want.
I cannot find:
(a) how I turned this on in the first place;
(b) how to turn it off;
(c) if there’s a more efficient way?(I have more details if anyone needs them, but for brevity’s sake, I’ll stop typing.)
Thanks,
RH
-
4 Replies
-
It’s the Bezier keyframes, you need Hold keyframes, check out Aharon’s tut:
AE Keyframe Boomerang Effect: Part 1
https://www.creativecow.net/articles/rabinowitz_aharon/boomerang_1/index.html
Beware the Aussie accent.
There is a part 2 also.
-
if you change the spatial interpolation of those keyframes (right click to get to the option) to linear than you they wont bounce, but you animation will move in a linear fashion from point to point..
if this is what you want as a default you can set the in the general prefs.
also, if you have you layer selected, you will see the keyframes and path, and see why it is doing what it is doing. if you hold down control and move your cursor over a position keyframe in the comp window, you will see it change to a >. if you click the keyframe it will make it linear as well
who is that masked man…
https://www.exposedideas.com/ -
Groovy.
RH
-
Hi Guys,
I’ve also been having this problem, but it’s slightly different so I solve it with nulls.
Aharon’s 2 tutorials cover moving and pausing then moving again, and 3 keyframes in a straight path, but not what to do when you have three keyframes in a curvy path. You can’t use the hold keyframe solution because you don’t want a pause, but you also can’t use the linear solution because your path is not a straight line (changing to linear is really a cheat that you don’t notice because of the straight line of motion.
But what if you want to move a layer along a semi-circle? you have a keyframe at the beginning, one at the apex of the curve, and one at the end, and change all to easy ease so the moving object moves in two “steps”. but it boomerangs around the middle point.
The only way i have been able to solve this is by a series of parented nulls, one for x, y, and z each.
AE needs another type of motion interpolation in addition to bezier and auto-bezier: something that will ease between keyframes with no tangent handles on the outside of the curve, if that makes sense. having to manually remove half the tangent handles (so each point only has one handle instead of two) manually is too irritating.
also, what about a timeline option that could be switched on or off to animate position channels individally without the use of nulls? turn the option off and all channels are “ganged” together and setting a keyframe on one sets keyframes on all. switch the option on and you have 3 channels of motion with no need for nulls.
Reply to this Discussion! Login or Sign Up