Give each channel opening hours, an opening ident and a closing/sign-off clip.
When disabled, this channel behaves exactly as before: schedules and the configured off-air fallback can run 24/7.
A closing time earlier than the opening time crosses midnight. For example, 18:00 → 02:00 closes at 2am the following morning.
Optional. The opening ident finishes exactly at opening time. The closing clip begins exactly at closing time, then the channel returns to its configured off-air fallback.