DigiDesign Pro Tools, Справочное руководство

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Chapter 36: Working with Video in Pro Tools 825
To lock a video track:
1
Select the video track or tracks you want to
lock.
2
Do one of the following:
• Start-click (Windows) or Control-click
(Mac) the name of any selected video track,
and select Locked.
– or –
• Right-click the name of any selected video
track, and select Locked.
Setting the Video Engine Rate
The video engine rate represents the number of
video frames output by Pro Tools per second,
and is determined automatically by the frame
rate of the first video file added to a session.
Video files subsequently added to the session
must have the same video frame rate as the
video engine rate.
The video frame rate is displayed for each video
file in the DigiBase browsers, and the current
video engine rate is displayed in the I/O View of
the main video track.
The video engine rate is independent of the ses-
sion's time code rate, which determines the
number of frames displayed per second in grids,
rulers, and counters. You can set the session
time code rate manually with the Time Code
Rate pop-up menu in the Session Setup window.
In order for the grids and rulers to align with the
actual frames of the video files in the Timeline,
the session's Time Code Rate setting should be
set to match the video engine rate (the frame
rate of the first video clip added).
Video Engine Rate Indicator
The Video Engine Rate indicator displays only
in the main video track (whether it is online or
offline) and shows the video engine rate, which
is the number of video frames per second output
by Pro Tools.
The Video Engine Rate indicator is normally
black, but turns red if one of the following con-
ditions are present:
• The video engine rate does not match the
session’s current Time Code Rate setting.
– or –
• A pull-up has been applied to the video,
causing the video engine rate to differ from
the session Time Code Rate.
Locked video track
See “Video Engine Rate Indicator” on
page 825 for information on the Video En-
gine Rate indicator in the I/O View.
Lock icon
Video Frame Rate
The Time Code Rate is set in the Session
Setup window. For more information, see
“Session Setup Window” on page 795.
Video
Engine
Rate