Apple iMovie HD Manuel d'utilisateur télécharger pdf (Page 20)

Effects Over Time

Effects aren’t an all-or-nothing proposi-

tion—iMovie HD can apply or remove an

effect gradually. Apply the Black & White

effect over time to make a clip start in

black and white and turn into Technicolor.

Animate the Soft Focus effect to make a

clip start out blurry and come into focus,

or vice versa.

To animate effects, use the Effects

pane’s Effect In and Effect Out sliders.

To have the effect appear over time,

drag the Effect In slider.

This value indicates how much time will

elapse until the effect is fully visible.

This value shows when the effect will

start to fade. The time is measured from

the end of the clip—in this example, the

effect will begin to fade 2 seconds and

11 frames from the end of the clip.

To make an effect go away over time,

drag the Effect Out slider.

Speed Effects

That video of Junior’s winning soccer

game could use some slow-motion

instant replays. iMovie HD provides them.

Select a clip in the timeline, display

the Effects pane, and then click on the

Fast/Slow/Reverse effect.

Want to see that winning

goal in reverse? Click

Reverse Direction.

To speed up the clip, drag toward Faster.

To slow down the clip, drag toward

Slower. When you move the slider, iMovie

HD previews your settings in the monitor.

To stop the preview, click the preview’s

Play button. To apply the effect, click the

Apply button.

Tips

Silence the sound. Slowing or speeding

a clip alters its audio playback, too. You’ll

probably want to mute the clip’s audio:

select the clip and type 0 (that’s a zero) in

the clip volume control below the timeline.

Slow down for smoother motion.

Slowing down a clip can also be a nice

way to smooth out jerky camera move

ment. If you had too much coffee before

shooting that ﬂower close-up, slow the

shot down a bit.

Layer effects. You can apply multiple

effects to the same clip, as if they’re

stacked on top of each other. To remove

an effect, select the clip and press the

Delete key, as noted at left. To remove

all effects, choose Revert Clip to Original

from the Advanced menu.

Effective Tips

Being selective. Another way to

control where an effect begins and

ends is to apply the effect to only a

portion of a clip. To do this, select the

clip in the timeline and then drag crop

markers to highlight the range of foot

age to which you want to apply the

effect. Now specify the effect settings

and click Apply.

Updating effects. To change a clip’s

effects, Control-click on the clip in

the timeline, then choose Edit Effect

Settings from the shortcut menu.

Make your tweaks, then click Update.

Removing effects. To remove effects

from a clip, select the clip and press

the Delete key.

Specifying position. Some effects,

such as Electricity, can be positioned

on the screen. Click in the monitor to

set a focus point.

Special effects are the spice of the movie

world. When used sparingly, they enhance a

movie and add appeal. When overused, they

can make your audience gag.

iMovie HD’s Effects pane is the gate

way to a full spice rack of special effects.

The Aged Film effect makes a clip look

like old movie ﬁlm, complete with scratches

and jitter. The Lens Flare effect simulates

the glare of bright light entering a camera’s

lens. Fairy Dust gives you that Tinker Bell

look, while Electricity creates faux light

ning bolts. And the Earthquake effect cre

ates a fast, back-and-forth blur that may

tempt you to duck beneath a desk.

iMovie HD introduced a few new

effects. The Edges effect creates an edgy,

neon-colored look. The Crystallize effect

makes a clip looks like it’s being viewed

through a shower door, while the Edge

Work effect creates a pen-and-ink look.

You can also apply speed effects to your

clips. Slow a clip down to get slow motion,

or speed it up for a chuckle.

You can apply effects to multiple clips at

once: Shift-click to select a range of clips,

1-click to select clips that aren’t next to

each other in the timeline.

Have fun with iMovie HD’s effects.

But remember: too much spice is worse

than none at all.

Adding Effects

To Add an Effect

Adding an effect involves selecting one or more clips,

specifying effect settings, then applying the effect.

Step 1. Select the clip or clips to which you want to

apply an effect.

Step 2. Click the Editing button and then the Video FX button

to display the Effects pane.

Step 3. Choose the desired effect by clicking its name.

iMovie HD displays a preview of the effect in the monitor.

Step 4. Specify the desired

settings for the effect.

iMovie HD can apply or

remove an effect over time;

see “Effects Over Time” on

the opposite page.

Each effect has its own

controls; they appear in

this area.

Step 5. To apply the effect

to the selected clip or clips,

click the Apply button.

iMovie HD renders the video

frames required to create the effect.

spread M18

iMovie HD: Making Movies

Adding Effects

iMovie HD: Making Movies

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Apple iMovie HD Manuel d'utilisateur Page 20

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