Did you set Spatial Interpolation for the Position keyframes to Linear? It defaults to Bezier.
Also, try animating Anchor Point instead of Position.
1 person found this helpful
I find the most visually appealing method is to never start a zoom on screen. If you intend to zoom in, whether on a still or done in camera with real video, always start the clip with the zoom already in motion.
1 person found this helpful
I agree with Jim... that's how I always do mine... Depending on what you're doing, a crossfade between clips that are already in zooming motion really helps create a smooth looking presentation. Usually crossfades are fine with picture sequences, too.
Thanks for your reply Colin,
I hadn't set Position to linear, but in doing so it makes no difference. The camera still swerves (in this case dips down as it zooms in) when I curve the Scale graph. ?? If I just add Ease In without manually adjusting the curve, there's no effect.
It's exactly as if putting a curve on Scale and its Velocity graph is putting a curve on Position, even though Position's graph remains linear and box-edged.
Thanks Jim and Dave,
That's probably a good idea as it's the sudden transition from a static view to instant velocity.
But what I'm doing is showing medical studies in journals, so I want to show for a few seconds the full study, just long enough so the title can be read, and then zoom in on an out quote. So transitioning to a zoom-in-progress wouldn't work in this particular case.
Sounds to me like you've accidentally got an extra keyframe set in there for
position--probably very close to the initial one. Zoom in closely on your
keyframes and see if you've got an extra one in there that's causing the
position change... Things don't happen randomly--there's always a
reason... in this case, it'd be a stray keyframe.
Can you upload a sample of what's happening? Also seeing a screenshot of your ECP along with the motion path visible in the Program Monitor would be helpful. Click the direct manipulation control in the Motion effect to reveal the motion path.
Thanks again Colin, here are the details. This example isn't medical studies, but same requirment.
First I show the pre-edit video and settings, followed by the result of editing (details below):
This is after edit and the edited setting. The only change was seleting Ease In for the first Scale key and then adjusting the bezier handle to curve the graph. Notice the dip down in the camera's path.
Both keys on Position are set to Linear Spaical Interpolition
I don't see anything wrong with the first, myself.
Jim, yes, the first video is fine. My point is to show before the problem.
The second video shows a 'dip down' of the camera I don't want and don't know how to avod.
In other cases the camera can swirve to the right or left.
Btw, this example is from a study of the Fukushima nulcear disaster I'm working on.
Well, the problem is that you have an ease on your scale, but not your position--so, the scaling is a little behind the position. If you add an ease out on the Position keyframe (first one), the animation between should be more in sync.
YES, that's the fix!
The curves for both Position and Velocity need to be synchronized, makes sense. This is all still pretty new to me.
Thanks once again Colin!
As I was reading down, I was leaning towards the "extra" Keyframe, that just was not being seen in the view of the Effects Control Panel's timeline.