User guide

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Matrox 4VANC capture and playback
16 is muted during playback, therefore it will not be available for playing back
audio. For playback, MXO2 lets you choose whether to embed the closed caption
data in your HD/SD video’s VANC, or in Line 21 of the VBI portion of SD video.
The next section describes how to enable Matrox 4VANC closed captioning for
capture and playback on MXO2.
Enabling closed caption capture and playback
1 From the Apple menu, click System Preferences, and then click the
Matrox MXO2 icon.
2 Click Matrox 4VANC.
3 Under Matrox 4VANC Capture, select Preserve SDI VANC closed
Captioning using audio track 16
to capture the digital closed caption data
from your source video’s VANC using SDI audio track 16.
¦NoteTo capture digital closed captioning, you must select SDI as your
video input source (see “Specifying your A/V input settings” on page 57). You
must also genlock to your capture source and not an external genlock source
(see “Specifying your genlock settings” on page 56).
4 Under Matrox 4VANC Playback, select Retrieve closed captioning
from audio track 16
to retrieve the Matrox 4VANC closed caption data
from track 16 in your video application, and play back the video with closed
captioning using MXO2’s SDI or analog output.