The telecine preroll is the time in seconds allowed for the telecine to
run up to speed and stabilize so that it may consistently perform edits
with a correctly framed picture.
This values should be at least 3 seconds, probably 5 seconds.
The runup of the telecine is the number of frames that the telecine
takes to get up to speed compared with a theoretical instant start,
plus the number of frames of video delay through the system.
When running at 24fps in 525 standard, there are three additional
offsets which also relate to the telecine runup. More of that later in
section 3.
The telecine TC SLIP value is an internal offset for the number of frames of video delay through the system and any counter delays. Changing this number will only affect the CHK telecine warning function and will not affect the timings involved in the actual edit.