Blackmagicdesign ATEM Television Studio Installation And Operation Manual page 55

Operating Your ATEM Switcher
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DVE transition parameters
DVE Rate The duration of the DVE transition in seconds and frames. Rotate the DVE rate
rotary encoder to adjust the DVE transition rate. The new rate is immediately
displayed in the transition rate window in the transition control block.
Normal The normal direction applies the DVE effect on program, revealing the preview
channel.
Reverse changes the direction so that the DVE effect is applied on the preview
Reverse
channel. In the case of reverse, program is covered by a DVE effect with the
preview video.
FlipFlop When FlipFlop mode is toggled on, the transition changes between normal and
reverse every time the transition is executed.
DVE key parameters
Enable Enables/disables the DVE key. The DVE key is enabled when the button is
illuminated.
PreMult Selects the DVE key as a pre-multiplied key.
Clip The clip level adjusts the threshold at which the key cuts its hole. 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
Gain
thereby softening the edges of the key. Adjust the gain value until the edge
softness is desirable but the background video luminance (brightness) is not
affected.
Inverse When the key is not pre-multiplied, inverts the key signal.
Sharing DVE resources
There is one DVE channel in the ATEM 1 M/E and 2 M/E Production Switchers which can be used to perform
DVE transitions or it can be used in an upstream keyer. The ATEM Television Studio does not have any
DVE channels available. When you select a DVE transition, if the DVE is used elsewhere in the system, the
DVE transition type will not be available and, on the broadcast panel, a DVE unavailable message will be
displayed. In order to use the DVE transition you must free the DVE from where it is currently used. Verify
that the upstream keys currently on program or preview are not DVE keys and do not have fly key enabled.
To free DVE from the upstream keyer, change the key type to anything other than DVE or disable fly key. The
DVE will be released and therefore available for use as a DVE transition.