M-AUDIO Pro Tools Recording Studio - Manual (Page 1060)

Pro Tools Reference Guide 1042
track. However, unlocking a region in a locked
track will not allow you to edit that region. It
will behave as if the region were locked until
you unlock the track.
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.
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.
You can Edit lock or Time lock individual
Video regions. For more information about
locking regions, see “Locking Regions” on
page 730.
See “Video Engine Rate Indicator” on
page 1042 for information on the Video
Engine Rate indicator in the I/O View.
Video Frame Rate
The Time Code Rate is set in the Session
Setup window. For more information, see
“Session Setup Window” on page 1010.
See “Pull Up and Pull Down” on page 1018
for detailed information on using video
pull up and pull down.
Video Engine Rate