Adobe Premiere Pro CS4 Uživatelský manuál stáhnout pdf (Strana 417)

411

USING ADOBE PREMIERE PRO CS4

Animation

Last updated 11/6/2011

Changing keyframe interpolation for the Position property of the Motion effect

A Linear spatial keyframe B. Auto Bezier interpolation C. Continuous Bezier interpolation

1 Do one of the following:

• In the Effect Controls panel, right-click a keyframe marker.

• In a Timeline panel, right-click a keyframe.

2 Choose an interpolation method from the context menu:

Linear Creates a uniform rate of change between keyframes.

Bezier Lets you manually adjust the shape of the graph, and the rate of change, on either side of a keyframe. You can

create very smooth changes using this method.

Auto Bezier Creates a smooth rate of change through a keyframe. As you change a keyframe’s value, the Auto Bezier

direction handles change to maintain a smooth transition between keyframes.

Continuous Bezier Creates a smooth rate of change through a keyframe. However, unlike the Auto Bezier

interpolation method, Continuous Bezier lets you adjust direction handles manually. As you change the shape of a

graph on one side of a keyframe, the shape on the other side of the keyframe changes to maintain a smooth transition.

Hold Changes a property value without gradual transition (sudden effect changes). The graph following a keyframe

with the Hold interpolation applied appears as a horizontal straight line.

Ease In Slows down the value changes entering a keyframe.

Ease Out Gradually accelerates the value changes leaving a keyframe.

Note: Although interpolation methods can vary the rate at which a property changes between keyframes, they cannot

change the actual duration between keyframes. Duration is determined by the time (or distance in the time ruler) between

keyframes.

Keyframe interpolation methods

A. Normal In/Out B. Bezier/Continuous Bezier/Ease In/Ease Out C. Auto Bezier D. Hold

Control change using Bezier keyframe interpolation

Bezier handles are two-directional controls that change the curve of the line segment between the handle and the next

point on either side. The farther you pull a handle from its keyframe (center point), the more the line bends or curves.

The curve that you create by dragging the Bezier handle determines how smoothly the effect changes occur as the

animation property approaches and leaves a keyframe. These handles offer you more control over animation changes

than simply choosing a keyframe interpolation method. You can manipulate Bezier handles in either a Timeline panel,

the Effect Controls panel, or the Program Monitor.

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Adobe Premiere Pro CS4 Uživatelský manuál Strana 417