Blackmagic ATEM Manual - Concept Music Art

63
Operating Your ATEM Switcher
Software control panel stinger parameters
Source
Pre Multiplied Key
Clip
Gain
Invert Key
Clip Duration
Trigger Point
Mix Rate
Pre Roll
The media player which will be used to play the clip for the animated transition.
Identifies the key signal of the media player clip as a pre-multiplied key.
The clip level adjusts the threshold at which the key cuts its hole into the clip that
is playing back through the media player. Decreasing the clip level reveals more
of the background. If the background video is completely black then the clip
value is too low.
The gain adjustment electronically modifies the angle between on and off
thereby softening the edges of the key in the clip that is playing back on the
media player. Adjust the gain value until the edge softness is desirable but the
background video luminance (brightness) is not affected.
Inverts the key.
Clip duration refers to the length of the animation. The duration should normally
match the length of the animation. It can also be used to trim out the end of the
clip.
Trigger point is the time at which the switcher will start the background mix
transition, which will occur under the animation. Usually, this is the point when the
animation is full screen.
The mix rate specifies the duration of the mix that will occur between preview
and program under the animation. To specify a cut instead of a mix simply set the
rate to 1 frame.
Pre roll is a trim in that can be used to trim the beginning of the clip. The
maximum preroll time is 3:00 seconds.