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Camera motion path keyframe issues
Hi folks. New to the forum and hoping someone could help me! The comp I have is set up with a number of 3D layers that stay in their original position (dotted around the 3D space) throughout. The idea is the camera moves around, and stops when it gets to each layer for a few seconds and then moves on to the next. I am desperately trying to complete each camera move using only 2 keyframes, a starting position and an ending position. I am then using the convert vertex tool on the camera motion path when I want the camera to do anything other than go in a straight line from point A to point B.
When it gets to point B I am adding another position and POI keyframe 3 seconds on in the timeline which is identical to the point B keyframes. From there, the camera goes on to point C, waits 3 seconds, on to point D and so on.The problem I am having is in the 3 seconds when the camera is meant to be stationary, it moves around seemingly randomly and yet ends up in the same spot (where the copied keyframe is placed). There are no other keyframes within this 3 second pause, and I cannot for the life of me figure out what is possessing my camera! It seems to make no difference what kind of keyframe I use.
Confused and stumped! Hope someone has a more logical explanation than mine right now which is that there are gremlins in my machine!
James
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4 Replies
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See these tuts:
1: https://www.videocopilot.net/tutorials/energetic_titles/
2: https://www.videocopilot.net/tutorials/presets_and_more/
Simon Bonner
youtube.com/simonsaysfx
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Thanks Simon 🙂
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What you’re seeing is sometimes referred to as “boomerang motion”. It comes from the spatial interpolation for keyframes being bezier when they would be more appropriately linear for this purpose.
See the “Controlloing change with interpolation” section of After Effects Help for a full explanation and some tips on correcting this. There are a couple of links on that page back to some videos here on the COW by Aharon Rabinowitz that do a good job of showing this, too.
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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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Thanks Todd. I actually found those tutorials, and they really helped.
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