Specifications

ptg
196
Introducing Effects
For example, a Resize effect does not change the appearance of a
clip until you begin manipulating its parameter values. In other words,
Media Composer doesn’t “guess” how you’d like the clip resized;
rather, it waits for you to input values.
Using Keyframes
As you learned when editing audio in Chapter 5, a keyframe is a point
at which you can set a specific value for the purpose of changing values
between different points in time. In audio editing, value changes are adjust-
ments in audio level and pan; in video editing, values changes are dictated
by the current visual effect.
Keyframe indicators appear as triangles in the Effect Timeline below the
Record monitor in Effect mode. Some effects are automatically populated
with Start and End keyframes; others require you to create keyframes if
you want to change an effect over time.
This Resize effect does not contain Start
and End keyframes
This Horizontal Wipe effect does contain
Start and End keyframes
NOTE The effects that
contain default Start and
End keyframes are cat-
egorized into the set of
effects that use “standard
keyframes,” which means
that all effect parameters
are adjusted by one set
of keyframes.
The effects that do not
contain default Start
and End keyframes are
categorized into the
set of effects that use
“advanced keyframes,”
which means that all
effect parameters can be
adjusted using separate
keyframes. (Editing using
advanced keyframes
is beyond the scope of
this book.)
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