Pyro Industries API-1394PCI Manual do Utilizador descarregar pdf (Página 289)

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CHAPTER 7: EFFECTS AND TRANSITIONS ■

Figure 7.15 Timecode window with effect times

Editing with Keyframes

Keyframes are the backbone of any effect. In scientific terms, the keyframes define the

principle of moments in any effect. Normally, a simple effect such as a wipe would

have only two keyframes: one at the beginning and one at the end. With Free DV and

Xpress Pro, all effects have a beginning and an ending keyframe—they cannot be deleted,

but they can be adjusted. You can also manually define other keyframes.

Each keyframe allows you to adjust or change effect parameters. Wherever you

feel the parameters need change, you can add a keyframe. The system determines what

needs to be done between keyframes to make the effect flow properly. The process

of in-betweening from keyframe to keyframe is called interpolation. At first, adding

keyframes might seem a bit challenging, and you might not get exactly what was

intended. Over time, as parameters are learned, your ability to use keyframes will

improve.

Keyframe indicators are shown in the Effect Timeline underneath the Record

monitor (see Figure 7.16). The indicators are small triangles . The Active

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