highascg

AMCP Clean Look Fade

This is the working banked look-to-look fade pattern used by HighAsCG for clean program transitions.

Goal

Prepare the incoming look without touching the layer that is currently visible on program, then crossfade both physical banks with the same transition duration.

For logical look layer 10, the two physical program banks are:

• Bank A: 10
• Bank B: 110

If bank B is currently on program, the next look is prepared on bank A.

Sequence

Example: channel 1, current program on 1-110, incoming look prepared on 1-10, transition 75 frames.

MIXER 1-10 CLEAR
LOADBG 1-10 "NEW_CLIP"
MIXER 1-10 FILL <x> <y> <scaleX> <scaleY> 0
MIXER 1-10 OPACITY 0 0
MIXER 1 COMMIT

PLAY 1-10
MIXER 1-10 OPACITY 0 0
MIXER 1-10 OPACITY 1 75 linear
MIXER 1 COMMIT

STOP 1-110
MIXER 1-110 CLEAR
MIXER 1 COMMIT

Notes

• Do not send mixer setup to the active program bank. Preparing MIXER FILL, MIXER CLEAR, or similar commands on the currently visible layer will move or reset the on-air look.
• For banked crossfades, only the top layer opacity tweens during the fade window (the bottom layer stays at full opacity so the composite never dips to ~50%):
  • Incoming on bank B (110 above 10): hide incoming, PLAY, fade incoming 0→1; outgoing stays at full opacity until teardown.
  • Incoming on bank A (10 below 110): PLAY incoming at full opacity underneath, fade outgoing 1→0; incoming is not pre-hidden or faded in.
• LOADBG ... MIX ... AUTO is suitable for native same-layer transitions, but not for this banked crossfade path because the AUTO transition can complete before the prepared bank is visible.
• Teardown of the old bank happens only after the fade window has elapsed.

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