User guide

97
Exporting your sequence to tape
Obtaining a frame-accurate export to tape
using Matrox device control
In order to obtain a frame-accurate export to tape when using Matrox device
control, there are various settings that you may need to adjust in the
Matrox
RS-422 Device Control Settings
dialog box:
•The
Mark In Time Code Offset and Mark Out Time Code Offset
determine when your device starts and stops recording on the tape. If the
recording doesn’t start on the tape at your specified In point and stop at your
specified Out point, you can adjust these offsets so that the recording
starts/stops earlier or later.
¦NoteAdjusting the Mark In and Out time code offsets won’t be required if
your recorder has auto edit capabilities and you set the edit mode for export
to tape to
Auto Edit as explained in “Setting up Matrox device control” on
page 90.
•The
Playback Offset determines when your sequence starts playing back.
Depending on your system, you may need to adjust this offset so that your
sequence starts playing back earlier or later.
Here’s an example of how to calibrate your RS-422 device for frame-accurate
export to tape:
1 Stripe an NTSC tape with continuous and consecutive time code starting at
00:00:00:00.
2 Create a new Matrox NTSC sequence with a bars and tone clip at least ten
seconds long containing time code starting at 00:00:00:00. Make sure you
place the clip at the start of your sequence.
¥Tip You can create a bars and tone clip by right-clicking in the Project
panel and choosing
New Item > Bars and Tone. You can add time code to
the clip by applying a Timecode effect as explained in your Adobe Premiere
Pro documentation.
3 Set up Matrox device control with the Mark In Time Code Offset, Mark
Out Time Code Offset
, and Playback Offset for export to tape set to 0
(see “Setting up Matrox device control” on page 90).
4 Export your sequence to tape and set the In point for the recording to
00:00:10:00 and the Out point for the recording to 00:00:20:00 (see
“Exporting to tape using Matrox device control” on page 94).
5 When the export to tape is finished, play back your tape and check where the
recording started. For example, if the bars and tone clip started recording at
00:00:09:25 on your tape (five frames before your specified In point), then
you need to set the
Mark In Time Code Offset to 5. Alternately, if the
recording started at 00:00:10:05 (five frames after your specified In point),
then you need to set the
Mark In Time Code Offset to -5.