Avid Technology Car Video System PT User Manual

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You can also change the following options:

Display Both Fields 

When combined with the 

Full Quality setting in the Video Quality icon 
(see “Changing Video Quality” on page 44), this 
setting provides full-resolution output to the 
DVI port.

Flip On Vertical Sync 

If you notice that your 

video output is “tearing” (horizontal distortion 
on rapidly moving or heavily edited sequences), 
select this option.

.

Expand Luminance for Computer Displays 

If you 

are outputting full screen playback to a standard 
computer monitor, select this option for a more 
accurate video image. If you are outputting full 
screen playback to a professional quality moni-
tor through Component, DVI, or HDMI out-
puts, you may want to deselect this option.

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Click OK to save your changes and close the 

dialog.

Video Frame Rate vs. Monitor 
Refresh Rate

When you play back video on a monitor with a 
refresh rate that differs from the video frame 
rate (as is often the case during playback of 
video through a DVI output), the output yields 
visual artifacts and offsets in synchronization 
between audio and video. For example, this oc-
curs during playback of a 24 fps video clip on a 
DVI monitor with a refresh rate of 75 Hz. 

If your workflow requires high-quality playback, 
you must output video through an Avid video 
peripheral to an NTSC or PAL monitor.

The artifact and audio/video sync issues occur as 
follows:

Frame “Tearing” & Video “Stutter” 

Frame “tear-

ing” is the horizontal distortion on rapidly mov-
ing or heavily edited sequences. Video “stutter” 
is the subtle shifting of video during playback.

You can remedy one of these issues at a time 
(but not simultaneously) using the Flip On Ver-
tical Sync option, located in the Full Screen Play-
back Settings dialog.

Audio/Video Synchronization Offset 

Audio/video 

synchronization varies slightly with each frame. 
Though usually not noticeable to the eye, more 
precise measuring devices cause offsets in AV 
sync of up to 1/2 frame or more. This is normal 
whenever using the output of a computer's 
monitor card, and does not affect capture, edit-
ing, or layback.

Capturing Audio and Video

Media Station|PT lets you capture video and au-
dio by:

• Manually capturing audio and video

• Re-digitizing an existing sequence

• Digitizing from an edit decision list (EDL)

Manually Capturing Audio and 
Video

Before capturing audio and video from tape, en-
sure that you have made the following connec-
tions: