Matrox MXO2 PCIe Host Adapter User Manual

Page 117

Setting up Matrox device control

as LTC or VITC for device control, you should select this option only if
you’re having problems using the time code on your tape.

From the

Time Base

list, select the time base that matches your tape, such as

30 fps Drop Frame

if you’re using NTSC video with drop frame time code,

25 fps

if you’re using PAL video.

Select

Use VTR’s internal cue

if the Matrox device control is having

problems cueing your VTR, such as when you cue to a specific In or Out
point. Because using the VTR’s internal cueing method slows down the
cueing, you should select this option only if you’re experiencing problems
cueing to a time code when using Matrox device control.

Under

Capture

, use the

Time Code Offset

to specify the number of frames

to adjust the start time for capture, if needed. For example, if your captures
are starting three frames too early (that is, three frames before your specified
In point), enter a time code offset of 3. Alternately, if your captures are
starting three frames too late, enter a time code offset of -3.

Under

Export to Tape

, you can specify various settings that enable you to

obtain a frame-accurate export to tape. For an example of how to calibrate
your device for frame-accurate recording, see

“Obtaining a frame-accurate

export to tape using Matrox device control”

on page

Device Edit Mode

Select one of the following modes to specify the

editing capabilities of your recorder:

•

Auto Edit

Select this if your recorder supports edit commands and

has auto edit capabilities. Devices that support this mode perform
frame-accurate recording. Therefore, you won’t need to make any
adjustments to the Mark In and Out time code offsets, and those
settings won’t be available.

•

Basic Edit

Select this if your recorder supports edit commands, but

does not have auto edit capabilities. When using this mode, you may
need to adjust the Mark In time code offset, but the recording should be
accurate at the Out point.

•

Edit Not Supported

Select this if your recorder doesn’t support any

edit commands. In this case, you will probably need to specify both a
Mark In and a Mark Out time code offset.

¥ Tip

If you’re not sure if your device supports edit commands, try

performing an export to tape using the different edit modes, starting with

Auto Edit

. If your device doesn’t support the selected edit mode, the

recording will either not start or nothing will get recorded on the tape.

Mark In/Out Time Code Offset

These offsets specify the number of

frames to adjust the recording start and stop times if the recording doesn’t
start at your specified In point and stop at your specified Out point on the
tape. For example, if the recording starts three frames before the In point,