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Why 24p video, Working with 24p sources – Apple Cinema Tools 3 User Manual

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Preface

An Introduction to Cinema Tools

Why 24P Video?

The proliferation of high definition video standards and the desire for worldwide
distribution has created a demand for a video standard that can be easily converted to all
other standards. Additionally, a standard that translates well to film, providing an easy,
high-quality method of originating and editing on video and finishing on film, is needed.

The 24P video standard provides all this. It uses the same 24 fps rate as film, making it
possible to take advantage of existing conversion schemes to create NTSC and PAL
versions of your project. It uses a progressive scanning scheme and a high definition
image (1920 pixels per line, 1080 lines per frame) to create an output well suited to
being projected on large screens and converted to film.

Additionally, the 24P standard makes it possible to produce high-quality 24 fps telecine
transfers from film. These are very useful when you intend to broadcast the final
product in multiple standards.

Working With 24P Sources

With the emergence of high definition 24P video recorders, there is a growing need for
Final Cut Pro to support several aspects of editing at 24 fps. To this end, Final Cut Pro
and Cinema Tools provide the following:

 the import and export of 24 fps EDLs
 the ability to convert NTSC 30 fps EDLs to 24 fps EDLs
 a Reverse Telecine feature to undo the 3:2 pull-down used when 24 fps film or video

is converted to NTSC’s 30 fps

 the ability to remove 2:3:3:2 or 2:3:2:3 pull-down when you capture your source clips

from a digital video camera source that applied 2:3:3:2 or 2:3:2:3 pull-down to 24P
video, so you can edit at 24 fps

 the ability to output 23.98 fps video via FireWire at the NTSC standard of 29.97 fps

video

 the ability to match the edits of videotape audio with the original production audio

tapes, and generate an audio EDL that can then be used to recapture and finish the
audio if you intend to recapture it elsewhere for final processing

Several of the features mentioned above are included with Final Cut Pro and do not
require Cinema Tools, however this book will describe all of these features because
they relate to working with 24P, which is of specific interest to many filmmakers.

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