Customizing effects in Video Editing

Most effects can be customized to some extent. When you click an effect, controls relating to that effect should appear in the Effects pane, as shown in Figure. The exact controls that will be available vary depending on the effect, so some experimentation may be necessary. In Figure, I am adjusting the Virtix Flame effect, which is available as a free iMovie plug-in from Virtix (www.virtix.com). Slider controls at the bottom of the Effects pane let me control the height and appearance of the flames. Some other controls on the Effects pane are common to all effects. These include

• Effect In: This slider lets you control when the effect begins. If you adjust this slider to create a delay, the effect appears gradually as the clip plays. If you want the effect to apply to the whole clip, leave this slider set to 00:00.
• Effect Out: Like the Effect In control, this slider lets you end the effect before the clip ends.
• Preview: If the tiny little preview screen in the Effects pane isn’t big enough to see the effect, click the Preview button. A short preview of the effect appears in the main iMovie viewer window, as shown in Figure.
• Apply: Click this to apply the effect to the currently selected clip in the timeline.

After you apply an effect to a video clip, iMovie must render the effect. A thin progress bar will appear on the clip in the timeline. Rendering is a process where iMovie applies your effect to the clip and creates a new video file on your hard disk that incorporates the change. If you decide later that you want to remove an effect from a clip, select that clip in the timeline, and then use the effect controls in the Effects pane to reduce the amount of the effect in the scene. You can’t remove the effect completely, but most effects can be