X4

134 Effects
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Note: The background video must be present in the track above the object for
the foreground! For example, track 1: background, track 2: foreground
Stamp: The currently selected object is "stamped" onto the video on the track
above the object. This is only possible if the bottom video takes up only a part
of the image, as otherwise only the bottom (currently selected) video would be
visible. Normally, the object should be reduced or moved first. This is done
with the help of the "SIze/Position" (view page 138) effect or via the submenu
"Section" in
"Effects -> Video object effects".
Color: Select the range with the color that should be transparent in the video
monitor. The video is made transparent in the areas featuring this color, and
the video on the top track can be seen "through" these areas.
Mix: This button mixes the two videos together. Brighter areas accumulate and
quickly seem white; darker areas have less of an effect on the result.
Green/blue/black/white: All green/blue/black/white areas of the video below
appear transparent. This studio-style effect makes it possible to "place" a
person who has been recorded in front of a blue (or green, white or black)
background into any type of landscape or background.
Alpha: This video effect uses the brightness of a video to control a cross-
fading effect between two other videos on neighboring tracks. The additional
videos should be arranged directly above and below the alpha-keying object.
In all black parts of the alpha-keying object, the top video is faded in, while in
all white passages the bottom video is shown. Gray passages are permeable
for both videos and create a mixture of the two. In the case of colored
passages, the brightness of the color is used for control purposes.
Water: Only the contours of the upper video are mixed, which results in a sort
of water effect.
Video level: The video level essentially changes the brightness of the video
before other video effects are applied. This can have significant influence on
the effects, especially in case of chroma keying. The level setting may be
automated so that two videos mix dynamically with each other. Read more
about this in the chapter "Animating objects (view page 150)".