Keying On Atem Switchers; Understanding Keying; To Preview Transition On Software Control Panel Or The Broadcast Panel - Blackmagicdesign ATEM Production Studio 4K Installation And Operation Manual

To preview a transition on the software control panel or the broadcast panel:
1
On the preview bus, select the video source that you want on the program output.
2 Select the transition type using the transition type buttons in the transition
control block.
3 Press the PREV TRANS button to put the switcher into preview transition mode.
The PREV TRANS button will illuminate red and the preview output will change so that it
is a copy of the program output.
4 Manually move the fader bar from one end to the other to preview the transition on the
preview output. The program output will remain unchanged.
5 Press the PREV TRANS button or return the fader bar to its starting position to
turn off preview transition mode. Returning the fader bar to its starting position will
automatically disable preview transition mode and turn off the red light on the PREV
TRANS button. Moving the fader bar after the light is off will take the transition on the
program output.

Keying on ATEM Switchers

Keyers are a powerful production tool that allow the arrangement of visual elements from
different sources on the same video image.
To do this, multiple layers of video or graphics are stacked on top of the background
video. Altering the transparency of various parts of these layers allows the background
layer to be visible. This process is called keying. Various techniques are used to create this
selective transparency and these correspond to the different types of keyers available on
your switcher.
The following section explains luma and linear keyers, which are available either upstream or
downstream, and chroma, pattern and DVE keys, which are upstream keyers.

Understanding Keying

A key requires two video sources; the fill signal and the key or cut signal. The fill signal contains
a video image which is to be stacked on top of the background, while the key signal is used to
select regions of the fill signal to be made transparent. The fill and key signals can be selected
from any of the switcher's external inputs or internal sources, allowing both still and moving
images to be used as fill or key sources.
Fill and key signals are selected on the software control panel from drop down lists in the
upstream and downstream key palettes. On the broadcast panel, fill and key signals are
selected using the select bus.
There are two types of keyers used in the switcher; upstream keyers and downstream keyers.
Four upstream keyers, also known as effects keyers, are available in the switcher's M/E block.
Each upstream keyer can be set up as a luma, linear, pre-multiplied, chroma, pattern or DVE
key. Two downstream keyers are available in the dedicated DSK block. Each downstream keyer
can be set up as a luma or linear key.
On DVEs and upstream keys using DVEs, you can also select the ME 2 program or preview
output as the DVE fill source. This gives you a tremendous amount of creative options
when keying.
ATEM 2 M/E Broadcast Studio 4K lets you output your key mask via powerful 12G-SDI auxiliary
outputs, or 6G-SDI outputs on ATEM Production Studio 4K models. It's as simple as pressing
the KEY MASK button on the front panel. You can also access your media player 1 and 2 image
and key sources by pressing their associated buttons on the front panel. With the key mask
Operating your ATEM Switcher 135 135