Reversing the telecine pull-down, Tips for using reverse telecine, Ab c d – Apple Cinema Tools 3 User Manual
Page 113
Chapter 6
Preparing the Source Clips for Editing
113
Reversing the Telecine Pull-Down
When you use a telecine to transfer your 24 fps film to 30 fps NTSC video, the typical
way the 24 frames are distributed into 30 frames is by the 3:2 pull-down method. The
3:2 pull-down method, as described in “
” on page 22, inserts extra
fields of video. The reverse telecine process removes the extra fields (as shown in the
illustration below), returning the video to its original 24 fps frame rate. In other words,
the reverse telecine process reverses the 3:2 pull-down. Reversing (or removing) the 3:2
pull-down provides a one-to-one relationship between the video and film frames so
that your cut lists are accurate.
Important:
If your source clips originated from a special type of DV camcorder that
shoots 24P, such as the Panasonic AG-DVX100 camcorder, a simpler form of the Reverse
Telecine dialog appears. See “
Removing 2:3:3:2 or 2:3:2:3 Pull-Down With Cinema Tools
on page 190 for instructions on reversing the pull-down for clips that originated from a
24P-capable DV camera.
A A B B
C C
D D
B
D
A
B
C
D
Discarded fields
29.97 fps
24 fps
Tips for Using Reverse Telecine
 Reverse telecine works best if the captured video does not have any dropped
frames. If you attempt to use the Reverse Telecine feature on a clip that has
dropped frames, a warning appears. See “
for more information.
 If you have to reverse the pull-down for several clips, you might want to use the
Batch Reverse Telecine feature instead, because it allows several clips to be
processed at once. See “
 Reversing the 3:2 pull-down with software is a time-consuming process; you’ll need
to allow waiting time while your computer does its work. Hardware reverse
telecine, performed by a third-party capture card while the video is captured into
your computer, is a speedier option.
UP01101.Book Page 113 Thursday, March 10, 2005 3:16 PM