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Working with keyframe interpolation: Lesson 10-3
The Motion effect moves clips through the screen over a period of time. Premiere Pro offers Keyframe Interpolation methods that suit both aspects of that motion: Spatial and Temporal.Spatial Interpolation refers to the motion pathwhere the clip will appear on screen. Temporal Interpolation refers to changes in velocity.When you worked with non-motion effectsFast Blur, Wave Warp, and Replicate, for exampleyou worked with Temporal Interpolation in the Velocity and Value Graphs in the Effect Controls timeline. The effects you've worked with generally haven't had screen location parameters so Spatial Interpolation has not been an option (Lightning is one exceptionits start and end points can have spatial and temporal interpolation).The focus for this lesson is Motion's Position parameter. It has a Spatial Interpolation option that you will likely use time and again. You won't find it in the Effect Controls panel. It's in the Program Monitor.
| 1. | Expand the View Zoom Level in the Program Monitor back to the defaultFitand expand the Program Monitor's frame to get a better look at the keyframes. |
| 2. | Drag the Lesson 10-3 Preset to the clip. |
| 3. | Drag any keyframe handle in the Program Monitor. That will change the motion curvethe Spatial Interpolationbut will not convert the keyframes in the Effect Controls timeline into Bezier curves (their icons remain diamonds).[View full size image] |
| 4. | Right-click on any keyframe in the Program Monitor and select Spatial Interpolation > Linear.That changes the motion lines at that keyframe into straight lines and sharp angles (they'll start curving as they approach a keyframe with Bezier Spatial Interpolation). |
| 5. | Right-click on any keyframe in the Program Monitor and select Temporal Interpolation > Auto Bezier (or any other Bezier Interpolation method).That changes the Temporal Interpolation keyframe in the Effect Controls panel into a Bezier curve. |
NoteThe keyframe in the Program Monitor does not switch to a Temporal Interpolation keyframe. It remains Spatial. To change the temporal characteristics of the keyframe selected in the Program Monitor, you need to drag its handles in the Effect Controls Velocity Graph. [View full size image]
![[View full size image]](/image/library/english/13835_fig_10_12_alt.jpg){kind=link}