-
Keyframing issue.
Hi!
Quick query regarding a problem I assume is fairly easy to fix, but one that nevertheless is unbelievable irritating!
I’m ‘zooming’ a title in. I do it by making the text layer 3D and setting the Z position value to -2000, then setting a keyframe a few frames later at 0. I don’t know whether or not there is a more efficient way of going this, but that’s by the by (Unless, of course, someone has a tip:P). I then want my title to smoothly move back a little over the next few seconds, so I set a keyframe a few seconds later for the Z position: 100. This used to work fine, but now my title zooms in, starts moving smoothly back, then for no apparent reason moves forwards, then back. No keyframe is set. I don’t understand.
I’ve tried Google, but I don’t really know what to search for. I assume I’ve checked something but didn’t realise at the time.
Help?
Thanks in advance,
Tom Maingay
-
3 Replies
-
Sometimes attaching the layer to a null (layer->new->null object) and controlling its position instead works out better. A null object is basically an invisible element that helps make harnessing visible elements easier.
Your other option is to create a camera and manipulate its position, and that’s also controllable by a null object (if you want to control the camera by a null object and move in z-space, don’t forget to toggle the null to 3D mode).
-
I suspect it’s your Keyframe Interpolation that’s doing this.
Select your keyframes, right-click and choose Keyframe Interpolation. Set Spatial Interpolation to Linear and that should be it.
This is the simplest way to keep control, though if you want more fine control there are tutorials on the site to help you do that, like this one. I haven’t seen it, but it sounds useful :o)
Hope that helps,
BenCurious Turtle Professional Video
Training | Editing |Supporthttp://www.curiousturtle.com
Just out: Rock Steady : Successful Motion Tracking in Mocha & After Effects -
As Ben says, this sounds like a quirk that some people call “boomerang” motion. It’s the result of using Bezier interpolation when you should be using linear interpolation. The issue and how to address it are described in the “Controlling change with interpolation” section of After Effects Help.
———————————————————————————————————
Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
———————————————————————————————————
Reply to this Discussion! Login or Sign Up