Apple Final Cut Pro 6 - Manual (Page 1908)

Appendix C Working with 24p Video 425
V
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.
Note: Even though the 2:3:2:3 pull-down pattern of a film-to-tape transfer is emulated
by this process, there are many other factors that contribute to a “film look,” such as
exposure, resolution, color, depth of field, and so on.
Most camcorders use a pull-down method referred to as advanced pull-down, which has a
2:3:3:2 pattern instead of the traditional telecine 2:3:2:3 pull-down pattern. The advantage
of this pattern is that it is more efficient for digital devices or applications (such as
Final Cut Pro) to remove and introduce than the traditional 2:3:2:3 pull-down pattern.
In Final Cut Pro, you can remove the redundant fields during or after capture. Once the
redundant fields or frames are removed, you can edit at 23.98 fps. When you
have finished editing, you can output back to 29.97 fps NTSC video by reintroducing
advanced pull-down (2:3:3:2) or traditional 2:3:2:3 pull-down. If you are outputting
to film or progressive-scan video, you don’t need to add pull-down.
Note: 1080i60 footage also uses the same 2:3:2:3 and 2:3:3:2 pull-down patterns to
record 24p footage.
Using an AG-DVX100 NTSC Camcorder
with Advanced Pull-Down
The steps below explain the workflow for capturing and outputting 24p video using
the Panasonic AG-DVX100 NTSC camera. Other NTSC camcorders that use this
advanced pull-down method can also follow this workflow.
Step 1: Shoot with advanced pull-down (23.98 fps at 29.97 fps)
Choose the 24p advanced pull-down option on your camera. This creates 29.97 fps
NTSC video that contains 23.98 fps progressive frames using a 2:3:3:2 pull-down pattern.
Step 2: Remove 2:3:3:2 advanced pull-down from 24p video during capture
Choose or create a capture preset that has the “Remove Advanced Pulldown and/or
Duplicate During Capture From FireWire Sources” checkbox selected. This checkbox is
available when you edit a capture preset in the Capture Preset Editor window
(accessible from the Capture Presets tab of the Audio/Video Settings window).