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Keyframes are going nuts in after effects and premiere

New Here ,
Jan 13, 2021 Jan 13, 2021

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No idea what is going on. I have my keyframes set to linear and it should be the most simple thing in the world to get them to move from one point to the other smoothly. But the programs are freaking out and speeding them up and bobbing up and down and I have no idea what is wrong. I literally have it as simple as a position change in the y axis, so I should just have the object move up and down in one smooth flow, but it bobs all over the place, even starts to go left to right even though I have not touched the x axis. Please help. I am also using CS6

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Dynamic link , Error or problem

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Community Expert ,
Jan 13, 2021 Jan 13, 2021

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There is a difference between temporal interpolation and spatial interpolation. When you get a layer moving then you stop it, then you set another keyframe a couple of frames later and start it moving again the velocity of the incoming motion will continue after the second keyframe then the layer will bounce back into position. When it leaves that position after the third keyframe it may start moving in the opposite direction before it moves forward again on its way to the fourth keyframe. This is called Ping Pong. If you select the layer and have keyframes visible you should be able to see the bezier handles in the timeline that shows you the motion path. You can fix this problem with the Pen tool or by clicking on a keyframe and changing the Spatial Interpolation to Linear. There is also a setting in the Preferences/General tab to change the default behavior. Linear is not the default because it usually doesn't look very good. Once you get the hang of it, and once you learn how to use hold keyframes, this problem goes away.

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Community Beginner ,
Dec 01, 2022 Dec 01, 2022

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That was really helpful! For the first time I look up a problem I am having in premiere and see a clear and detailed answer that solves it. Much appreciate it.

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