6.x

Table Of Contents
Types of Projects
27
This rate is also used for film (film-based television) or 24p HD video
(television or feature film). These sources can be downconverted to
standard NTSC without further audio slowdown. Audio captured at
48 kHz can remain at 48 kHz throughout the project.
Your film and audio sources have been synced in the telecine process and
transferred to Digital Betacam
®
or other digital videotape formats.
n
The 23.976 fps frame rate is sometimes referred to as 23.97 fps or 23.98 fps.
n
The 23.976 fps frame rate is in direct proportion to the NTSC broadcast frame
rate of 23.97 fps, which is used for film-to-tape transfer to the Avid editing
system.
Be aware of the following considerations:
For film projects shot at 24fps, audio must be “pulled down” or “slowed
down” before it can be captured into a 23.976p project. The user does not
have the choice of capturing non-pulled-down audio. Unlike 24p NTSC
projects, where the audio pulldown switch can be set to 1.0 or 0.99 to
support either 24 fps or 23.976 fps, 23.976p projects do not use the audio
pulldown switch. These 23.976p projects can only support 48 kHz audio
that is in sync with 23.976-fps picture on a 29.97-fps transfer tape.
OMF (Open Media Framework
®
) and AAF files that are output from a
23.976p project look slightly different from those from a 24p project. The
edit rates will show up as 23.976 fps in these files.
c
Because of the way project information is stored, previous versions of
Avid editing systems do not recognize 23.976p projects as being different
from 24p projects. You can open 23.976p projects in previous versions,
however, none of the media can play because of the different internal edit
rates. Projects are not corrupted by opening them in older versions of the
software (unless you try to modify clips or edit sequences). If necessary,
you can recapture the media in the 24p project.
Capturing with Advanced Pulldown
When you capture NTSC footage with a mini-DV camera over an IEEE
®
1394
connection, you can choose to capture with Advanced pulldown. This allows
native DV editing applications such as your Avid application to create 23.976p
media. Advanced pulldown is set automatically when you capture and requires
no further adjustment in your Avid editing application.