Apple Final Cut Express HD - Manual (Page 686)

686 Part IX Effects
Video Filters
Video filters are generally used to solve specific problems with clips in your sequence,
although there are design-oriented filters in this category as well.
Filter Result
Blink Flashes the clip on and off. You can adjust the frequency
independently using the On Duration and Off Duration sliders, and
the maximum dip in opacity using the Opacity slider.
Deinterlace Can be used to remove the upper (odd) or lower (even) field from
an interlaced video clip. The remaining fields are interpolated to
create a whole image, with marginal softening of the image as a
result. A pop-up menu allows you to remove either the upper or
lower field.
The Deinterlace filter is useful when you want to create a still
image from interlaced video clips of people or objects moving at
high speed. Since each frame of video is a combination of two
interlaced fields created sequentially over time, this can result in a
flickering image. The Deinterlace filter can also be useful if you’re
outputting a QuickTime movie for computer playback, since
computer screens display lines progressively.
Flicker Reduces flicker caused by interlacing in still frames that have thin
vertical lines, such as title pages with small text. Three settings are
available: minimal, medium, and max. These settings allow you to
selectively trade off between the amount of flicker and the amount
of vertical softness in the resulting video image.
Image Stabilizer Stabilizes motion in a jittering clip. It is best used on a clip that’s
supposed to have no camera movement, but has wiggling from an
unsteady tripod mount or from handheld operation.
The Source pop-up menu allows you to view the clip before and
after image stabilization has been applied. The Center point control
allows you to select a particular element in your video clip to use
as the target for stabilization. The selected target should be a high-
contrast element with a clearly defined shape.
The Scan Range slider allows you to define the areas of your clip
that are analyzed to track the motion of the selected target. Clips
with greater motion should use a larger scan range; clips with more
subtle motion can use a smaller one. The Show Scan Area
checkbox shows and hides the image stabilization target.
Stop Motion Blur Blends frames in the clip. You can adjust the time, steps, opacity,
and operation used to blend the frames.