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Trigger Point 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.
Mix Rate 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 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.
Pre Multiplied Key Identifies the key signal of the media player clip as a pre-multiplied key.
Clip 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 toolow.
Gain The gain adjustment electronically modifies the value which allows the
softening of 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.
Invert Key Inverts the key.
It is important to understand that the trigger, mix and duration times are dependent on one
another. For example the trigger + mix rate cannot be larger than the overall duration. Note also
that the time displayed in the transition rate window is equal to the overall duration+ preroll.
DVE Transitions
Your switcher includes a powerful digital video effects processor for DVE transitions. A DVE
transition displaces the image in various ways to transition from one picture to another.
For example, a DVE transition can be used to squeeze the current picture off screen revealing
a new video under it.
To perform a DVE transition on ATEM Television Studio HD8:
1 On the preview bus, select the video source that you want on the program output.
2 Press the DVE transition type button to select the DVE transition. The DVE settings will
appear on the LCD menu.
NOTE If the DVE is already being used in an upstream key, the DVE transition type
will not be available for selection until the key is taken off air and off next transition.
Refer to ‘sharing DVE resources’ later in this section for moreinformation.
3 In the DVE LCD menu, use the soft control knobs and buttons to configure the DVE
parameters. For example, select the DVE pattern, movement, direction and adjust the DVE
transition rate. Use the ‘left’ and ‘right’ arrow buttons to the side of the LCD to navigate to
the additional settings.
4 Perform the transition as an auto or manual transition using the auto button or fader bar.
99Operating your ATEM Switcher
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