DigiDesign Digidesign Pro Tools 8.0, Справочное руководство

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Chapter 48: Working with Video in Pro Tools 1037
DV Stream Movies
Pro Tools does not support
audio from a DV Stream file. DV Stream files
contain the entire data stream that has been
transferred or recorded over the FireWire cable
from a camera. In this type of file, the audio and
video data are stored in an interleaved fashion,
as opposed to a QuickTime file where audio and
video are stored separately.
Limitations for Applying Pull-Ups
to QuickTime Movies in Sessions
Containing Avid Video
Applying a pull-up to QuickTime movies is dis-
allowed if you also have Avid video in that ses-
sion. You can only use video pull-up for sessions
that do not contain Avid video.
Windows Media Video (VC-1
AP Codec) Support in
Pro Tools
(Windows Vista Only)
Pro Tools supports the import and playback of
Windows Media video files created using the
VC-1 Advanced Profile codec. See your Win-
dows documentation for detailed information
about Windows Media video.
Windows Media Video File Caveats
The following limitations apply to Windows
Media video in Pro Tools.
• Pro Tools cannot open Windows Media video
files that require Windows Media File Digital
Rights Management (DRM) passwords to
view.
• High-resolution Windows Media video files
play back accurately at normal speed on the
Windows desktop or an external monitor
with a qualified DirectShow output device.
However, due to processing requirements for
VC-1 decompression, Digidesign cannot guar-
antee accurate playback of video frames when
performing other transport commands (such
as scrubbing, looping, and off-speed play).
• Pro Tools does not support Windows Media
playback via Avid video peripherals.
Before Starting Your Project
Before you start any project that requires work-
ing with video, consider the following:
Frame Rate
Before receiving video, find out the
frame rate. Use this frame rate when setting the
frame rate of your Pro Tools sessions and when
capturing video.
Creator Application and Codec Before receiving
video as media files, find out the application
and codec used to create those files. Then con-
firm that you can play those files in Pro Tools. It
is always a good idea to get a sample file in ad-
vance.
QuickTime Movie Time Code Burn-in Before re-
ceiving QuickTime movies, request the time
code display to be “burned in” (superimposed) if
possible. This ensures that Pro Tools places the
file at the correct time code location in the
Timeline.
See also “Exporting QuickTime DV from
Avid” on page 1056.
Though not prohibited, editing Windows
Media video or adding multiple clips to the
Timeline can lead to irregular video output
performance.