Apple Final Cut Pro 7 - Manual (Page 1942)

24 @ 25 Repeat
This method simply repeats every 24th frame once to fit 24 fps footage into 25 fps. This
causes a noticeable stutter every second but requires less processing than the 24 @ 25
pull-down pattern because no special interlacing is required. This pull-down pattern is
analogous to the NTSC 2:2:2:4 pull-down pattern in the sense that it requires the least
amount of processing power but results in the most noticeable stutter. You should use
this option for preview purposes only and avoid it for final output.
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One second
24 fps
25 fps
Native 24p
Some video camcorders that record to file-based media can record at 24 or 23.98 fps. For
example, the Panasonic AG-HVX200 can record 23.98 fps footage directly. Digital cinema
cameras such as the Panavision Genesis, the Dalsa Origin, and the RED ONE can record
natively at 24 fps. Of course, film is also recorded at 24 fps.
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One second
Film, 24p Video, and Cinema Tools
Cinema Tools is used mainly to edit movies shot and finished on film, or whenever film
production techniques such as separate picture and sound recording are used. To make
editing cheaper and more convenient, NTSC or PAL telecine transfers are used as
intermediate digital editing formats. Cinema Tools can remove 3:2 pull-down from 29.97 fps
telecined video or conform 25 fps telecined video back to 24 fps so you can edit at the
proper frame rate. For more information, see
“Working with Film and Cinema Tools.”
Working with 24p NTSC Video
Several camcorders have the ability to emulate the telecine process by exposing and
shuttering at 23.98 fps and then adding a 2:3:2:3 pull-down when the signal is recorded
to tape at 29.97 fps. The result is NTSC-compatible video that looks similar to a film-to-video
transfer.
1942 Appendix D Working with 24p Video