Specifications

Pro Tools Reference Guide562
The choices available in the Video Rate Pull
Up/Down menu depend on the file format of
the video clip, as well as its frame rate. The fol-
lowing table shows the pull ups available for
Avid video clips, both interlaced and Progressive
Scan.
Video pull rates are saved with the session.
No Video Recording with Pull Ups
(AVoption|XL Required)
Video may not be recorded to the timeline if a
video pull up is selected. If the video track is
record enabled while video pull ups are enabled,
or if you attempt to set a video pull up rate while
the video track is record enabled, Pro Tools will
post a dialog and disallow video recording. To
proceed with digitization, reset the Video Rate
Pull Up menu to None.
What is Pulled Up or Down?
The following sections describe how related
Pro Tools features are affected by pull up and
down rates.
Time Code Ruler
Video pull up and down does not affect the Time
Code Ruler. Be sure to set the session Frame Rate
to the correct frame rate for your project. For ex-
ample, if working with 24 fps video and you pull
the video up by 4%, switch the session Frame
Rate to 25 fps to keep the Time Code Ruler
aligned. Similarly, if working with 24 fps video
that is pulled down by 0.1%, switch the frame
rate of the session to 29.97.
When working with 25 fps Avid media and the
video is set to pull down by 4%, set the session
Frame Rate to 24 fps.
Plug-Ins
For proper operation at larger (4%) pull rates,
plug-ins must utilize sample clock instead of an
absolute time clock. All Digidesign plug-ins are
based on sample clock.
Higher Sample Rates and Pull Factors
4% audio pull rates are not available in 176.4
and 192 kHz sample rates sessions.
Putting Pro Tools Online
To trigger playback or recording from an exter-
nal source, the Pro Tools Transport must be
placed online. This tells Pro Tools to listen for in-
coming time code.
To put the Pro Tools Transport online, do any of the
following:
■ Choose Operations > Online.
■ Click the Online button at the far left of the
Transport.
■ Press Control+J (Windows) or Command+J
(Macintosh).
Video Frame Rates and Pull Options
Format and
Video
Frame Rate
Available
Video
Pull Rate
To synchronize with
Avid Video
24 fps
None
–0.1% 29.97 NTSC videotape
+4.167% 25 fps PAL videotape
25 fps
None
–4.0% 24 fps
+4.167% 29.97 NTSC videotape
29.97 None