Avid Technology Pro Tools HD 7.2 - Manual (Page 111)

Chapter 8: General Video Improvements 105
Compensating for Video
Monitoring Delays
In Pro Tools 7.2, the QuickTime Movie Offset
function has been updated as follows:
• The QuickTime Movie Offset command and
dialog have been renamed to the Video Sync
Offset command and dialog.
• The Video Sync Offset dialog has been up-
dated to let you compensate for delays in
video output introduced by certain types of
displays, such as plasma monitors.
To compensate for delays caused by video
monitoring devices:
1 Choose Setup > Video Sync Offset.
2 In the Set Video Sync Offset dialog, enter a
value appropriate to compensate for the delay
caused by your video monitor chain. (Third-
party devices are available to help you measure
this delay.)
Avid Video Offset When playing Avid video
through an Avid video peripheral, Pro Tools au-
tomatically compensates for the delay intro-
duced by the peripheral. This means you can
leave the setting at 0 frames and the output of
the Avid video peripheral will be in sync with
the audio. If a plasma monitor or other device
introduces additional delay, you can compen-
sate for it by entering the amount of the delay
here.
QuickTime Video Offset Pro Tools does not auto-
matically compensate for the delay when play-
ing QuickTime video through any FireWire pe-
ripheral, including Avid video peripherals. The
amount of delay introduced varies based on
your system and the type of video peripheral
you are using. When using an Avid peripheral
with QuickTime, 18 quarter-frames is a good
starting point, but you will need to verify the
precise setting for your system. (Third-party de-
vices are available to help you measure this de-
lay.)
Once this value is set, it should not need to be
updated unless you change components in your
video monitoring chain (such as projectors or
plasma screens).
Bouncing the Video Track to a
QuickTime Movie
Pro Tools 7.2 with QuickTime 7.1.2 or higher
lets you bounce the main video track (Quick-
Time or Avid video) and a mono or stereo mix-
down of your session to a new QuickTime
movie. As a QuickTime file, the new movie is
supported by all software applications that sup-
port QuickTime video.
You can choose from a variety of standard
QuickTime codecs, which are fully compatible
with other QuickTime applications.
An Avid video peripheral is required to work
with Avid video. See the Avid Video Periph-
erals Guide for detailed information.
Video Sync Offset dialog
Because all formats and codecs have not
been tested, you should verify the Quick-
Time movie bounced successfully.
Pro Tools cannot bounce audio or video to
an MPEG-2 video file.