Operating your ATEM Switcher
DVE transition parameters
Rate The duration of the DVE transition in seconds and frames. Use the set button
and settings knob to adjust the DVE transition rate.
Pattern Selects the DVE pattern. The pattern can be selected from the LCD menu, or
ATEM Television Studio pro HD’s control panel.
Direction The ‘normal’ direction applies the DVE effect on program, revealing the
preview channel. The ‘reverse’ direction changes the direction so the DVE
effect is applied on the preview 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
Fill Source Selects the source for the fill. The fill signal Is the graphic used to move across
the top of the transition.
Enable Key Enables or disables the DVE key. Set to ‘on’ to enable, or ‘off’ to disable.
Key Source Selects the source for the key. The key signal is a grayscale image that defines
the region in the graphic that will be removed so that the fill signal can be
correctly stacked on top of the transition.
Pre Multiplied Key Selects the DVE key as a pre multiplied key. Set to 'off' to enable additional key
parameters.
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.
Gain The gain adjustment electronically modifies the angle between on and off
thereby softening the edges of the key. Adjust the gain value until the edge
softness is desirable but the background video luminance,
or brightness, is not affected.
Invert Key When the key is not pre multiplied, inverts the key signal.
Sharing DVE Resources
ATEM features a DVE channel which can be used to perform DVE transitions or used in an
upstream keyer. When you select a DVE transition, if the DVE is used elsewhere in the system,
the DVE transition type will not be available. In order to use the DVE transition you must free
the DVE from where it is currently used. Verify that the upstream key currently on program or
preview is not a DVE key. To free DVE from the upstream keyer, change the key type to
anything other than DVE. The DVE will be released and therefore available for use as a
DVE transition.
The graphic transition is a popular transition that uses the DVE and moves a graphic across the
screen over a background transition. For example, the graphic wipe moves a graphic over a
horizontal wipe, essentially replacing the wipe border. A graphic mix spins the graphic across
the screen over a mix transition. Graphic transitions are perfect for wiping the station logo or
football graphic across the screen revealing a new background. Graphic transitions use a
special keyer built into the transition block, leaving all of the upstream and downstream keyers
available for compositing the output. The following section explains how to build and perform
graphic transitions.
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