Pull-down, Patterns you can apply to 23.98 fps video, Scribed in – Apple Cinema Tools 3 User Manual
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Chapter 11
Working With 24P Video and 24 fps EDLs
Pull-Down Patterns You Can Apply to 23.98 fps Video
When editing 23.98 fps video, you may want to output it to an NTSC monitor, record it
to an NTSC videotape, or send it to another type of NTSC device. When you need to do
this, you can use the pull-down addition feature in Final Cut Pro. Pull-down addition is
a software method of converting 23.98 fps video to the NTSC standard of 29.97 fps.
There are three different patterns of pull-down that Final Cut Pro can apply to
23.98 fps video.
3:2 pull-down
3:2 pull-down is the same type employed by a telecine, as described in “
” on page 23. Because 3:2 is the conventionally supported pull-down
pattern for NTSC devices, you need to use this pull-down pattern to record to an NTSC
device, such as standard definition television, an MPEG-2 encoding device, or a
high-end finishing system.
A
B
A
B B
C
C
D D D
Before 3:2 pull-down
24 fps frames
One second
A
B
C
D A
D A
B
C
D A
B
C
D A
B
C
D
A
B
C D
B
C
After 3:2 pull-down
NTSC frames (divided into fields)
A A B B B C C D D D A A B B B C C D D D A A B B
C C D D D A A B
B
B
C
C
D D D A
B
A
B B
C
C
D D
B
D
A
B
C
D
A A
B
B
B
C
C
D D
D
Field
1
Field
2
Field
1
Field
2
Field
1
Field
2
Field
1
Field
2
Field
1
Field
2
UP01101.Book Page 194 Thursday, March 10, 2005 3:16 PM