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Straight move with keyframes?

Okay, I give up. Please help.


I am trying to get a graphic to move in a continuous LINEAR motion across the screen. No ramping up, no ramping down, no cute little S-curve flow path....Setting keypoints at the beginning and end of the move causes FCPX to default to some kind of weird (supposedly helpful) ramping and decidedly NOT straight moves near the beginning and the end of the slide.


I have control clicked the keyframes and chose Linear (as opposed to the default "Smooth". I have tried everything to get FCPX to quit getting in my way and let me do a good old fashion abrupt start and stop along a linear line with no ramp up or down.


Anyway, I MUST be missing something... but right now I'm just frustrated that this simple task has taken so much of my time.


Help.

Posted on Aug 15, 2012 12:02 PM

Reply
21 replies

Aug 15, 2012 2:17 PM in response to mabou

Setting the keyframes to linear will do it.


Is the animation going to a position, stopping, pausing, and then starting again? If so, you have to be carefull because there are two keyframes one on top of the other. You have to go to the keyframe, shift the image of the way to access the underlying keyframe and set it to linear. Then reposition precisely so the keyframes match. Using whole intergers in the inspector will make it easier.

Aug 15, 2012 2:25 PM in response to Tom Wolsky

Hi Tom,

Nope, no hidden keframes. I just want the animation to start, move, and stop. It is acting as if I am using bezie curves, but this is as simple an animation as it gets. Two key frames, a dead straight path. But the graphic is doing an s- curve, especially at the top and end keframes. It is as if I have easing turned on and have grabbed a handle to soften the start and stop... Yet the two points show linear for the motion. Have deleted and retried the animation about a dozen times using different approaches... Always the same thing.... Grrrr

Aug 20, 2012 2:27 PM in response to Tom Wolsky

Tom,


I am having the same problem. I am trying to do simple moves around a hi-rez picture. I start wide... ZOOM to a CU... hang there for a bit... then PAN to another portion of the same image.


But... my picture gently "wobbles" between keyframes, EVEN THOUGH the parameters for the next set of keyframes (shown in the inspector) are EXACTLY the same as the previous keyframe. What gives? I read in your posts that I may need to change my keyframes to "linear." If so, I can't figure how.


Last... is there a way to do MULTIPLE moves in Ken Burns? I only see one "begin" and one "end?"


I appreciate your time.


- DS

Aug 20, 2012 2:48 PM in response to dastoelk

This might help:


http://www.youtube.com/watch?v=8-oB2fCT_N8


I called it ZPR for Zoom Pan Return -- but you can turn off parts of the transitions... and, you can delete the title entries if you don't want any text on the screen from the inspector.


The video pretty much explains it all, and there's a link in the description to download the effect (title). It's free --


Hope you find it helpful.

Aug 26, 2012 2:12 PM in response to Tom Wolsky

I am having the same ease in/out issue and nothing mentioned here has worked. I set interpolation to linear. I made sure the positions were full integer X,Y values. And still I get these goof-ball moves right at the ends of the motion.


I too am simply trying to move a shot from one point to another (tho mine incorporates a slight zoom-in). It's a still, and the focus of the image is moving down from top right to center, zooming in slightly during the path so that it dominates the frame at path's end.


Despite following the above directives I'm getting slight "hooks" if you will at both ends of the path. Just as it's embarking on the path from right to left it first nudges to the right before it heads left as designed and then just before it ends its run, it hooks back right for a few frames. The zoom-in progresses unabated while this is going on.


Maddening.

Sep 8, 2012 2:29 PM in response to mabou

Frustrating...
However, I found a work around. Keeping Tom's last comment in mind (that scale and position work very differently) I left the position values alone, and set my anchor point the the area I wanted to zoom into. I then re-framed the displaced video in my canvas and keyframed my scale values.


This gives you a nice consistent zoom to a selected area on your canvas, not an awkward dolphin dive into the dead space behind your clip.

Sep 8, 2012 4:38 PM in response to dastoelk

Hmm... That just spun my head.


I didn't keyframe the anchor point, I just offset the point onto the area I wanted to zoom towards, and then re-centered the clip in my canvas.

Since the Scale parameter scales around the anchor point, it gives the same effect without changing the position values.


To sum it up: By changing your anchor point, you change the point your clip scales and rotates around. From there, you just have to keyframe your scale parameter and it will give the illusion of a zoom and a displacement.


All good?

Sep 9, 2012 10:39 AM in response to Tom Wolsky

Yes, animating a crop works. And, yes, I've perfected the single move using the scale function.


But... I'm doing a series of moves (with pauses at certain points) inside very hi-rez images. This is where it gets complicated and the spurious "hooks" come into play. And, for the most part, the various work-arounds mentioned in this discussion work. (And, I thank you, Mr. Wolsky!)


But, I still get the slightest of "hitches" at each point. And I don't get the benefit of "ramp up / down" as it relates soley to "speed." (I get the sudden stops / starts.) Yes, there are work-arounds here, too... like compounding / exporting the clips and then initiating "holds," etc. I've also used third-party plug-ins. But, even they have limitations when it comes to executing multiple moves.


Sigh...


I actually miss the ADO I was using way back in 90's. Intuitive. I would throw an image into the box, manipulate it, preview it, no render time...


But, thanks again, Tom. I shall be needing your wisdom in the future. You're good people.

Straight move with keyframes?

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