David Doob pointed this out to me — you can change the shape of the line between two keyframes to add ease-in/ease-out behavior to the transition between two keyframes.
This is new to FCP X – in FCP 7, we needed to manipulate Beziér control points attached to each clip. No longer.
Here’s how this works.
1. Select the clip to which you want to add keyframes and type Control+V. This displays the video animation bars above the clip. These bars include a variety of parameters.
2. Click the small dark box on the right side of the Compositing: Opacity bar to enlarge it. I am using Opacity to illustrate this, however, this technique works on many different settings within FCP X – as long as they can be keyframed. (Not all parameters have this dark box, which means the bar containing their settings can’t be expanded.)
3. Press the Option key and click the thin horizontal black line where you want to set keyframes. In this screen shot, I’ve already set two keyframes and am getting ready to set a third between them.
To move a keyframe in time, drag it horizontally. To change the value of a keyframe setting, drag the keyframe vertically. Once you start dragging a keyframe in one direction, say, horizontally, you can’t change direction to vertical until you release the mouse.
NOTE: To move a keyframe, or line, in smaller increments, hold the Command key while dragging.
Now the magic starts. Right-click the line BETWEEN two keyframes to reveal four line shapes and select the timing adjustment you want to make:
Linear. This is the default setting, which provides a constant speed between two keyframes.
Ease. Starts and ends slowly, accelerates in the middle.
Ease In. Starts quickly, slows as movement approaches the ending keyframe.
Ease Out. Starts slowly, speeds as movement approaches the ending keyframe.
To delete all keyframes associated with a specific parameter of a clip, select the clip, go to the Inspector, and click the small, downward-pointing triangle next to the keyframe diamond at the far right side of the parameter control.
To hide the Video Animation bars, select the clip and type Control+V again.
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