Advanced Operations
Building Keyer E-MEM Transitions
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effects with transitions, keep the E-MEM transition rules in mind, which are different from
the rules used for manual transitions. The beginning and ending states of the buses and
transition elements must be set properly.
Though background and keyer transitions are described here as separate procedures,
effects can easily be built that include both background and key transitions in the same
keyframe by selecting the appropriate next transition element buttons.
E-MEM Transition Rules
Key Priority Transitions interpolate wipes and mixes as part of an E-MEM.
Note: When creating a priority transition that will interpolate as part of
an E-MEM, it will only transition correctly if the ‘Next’ Priority Stack on the
initial keyframe is set to match the ‘Current’ Priority Stack of the
subsequent keyframe.
• A background transition will occur only when the Bkgd next transition element is
selected on the initial keyframe AND the source selected on the B bus of the initial
keyframe matches the source selected on the A bus of the following keyframe.
Note: The decision to perform a background transition is based on
keyframe values, regardless of the state of Bus or Source Holds. If a Hold
is active you will not be able to tell by looking at the currently selected
sources whether a background transition will occur.
• A keyer transition will occur only when the keyer (for example Keyer 1) background
transition element(s) for the keyers involved are selected on the initial keyframe AND a
keyer changes its on/off state at the following keyframe.
• If Effects Dissolve is on, when an effect is recalled transitions will occur between the
previous switcher state and the first keyframe of the effect, following the rules above. If
Effects Dissolve is off effect recalls will cut to the first keyframe of the effect.
Build Background E-MEM Transitions
When building background transitions make sure the A and B background bus selections
are consistent throughout the effect. Otherwise the background video may cut to different
sources when keyframes are encountered. Plan ahead to the next transition when you
create keyframes in an effect that has multiple background transitions.
1 Go to the keyframe in the effect where you wish the background transition to begin.
Note: Adding new transition keyframes to the end of an effect is the
easiest way to build effects containing background transitions, though
using this method is not required.
2 Select the Bkgd next transition button.
3 Select the type of transition (
Mix, Wipe 1, or Wipe 2).
4 Select the new source to transition to on the B bus.
5 Press
Modify to change the keyframe to the values set above.
6 Perform the transition by moving the lever arm or pressing the
Auto Trans button. This
lets you preview how the transition will look (though the transition duration used may
not match the keyframe duration specified).
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