User guide

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Chapter 7, Configuring Your MXO2 System
4 If you selected the Enable audio mapping option, for each of the MXO2
outputs, select the desired audio pair from your application.
¦NoteIf you enable playback of Matrox 4VANC AFD or Matrox 4VANC
closed captioning, audio track 15 or 16 will be muted and won’t be available
for audio playback (see “Matrox 4VANC capture and playback” on page 70).
5 Under Miscellaneous, select the Number of HDMI channels that you
want to output from MXO2’s HDMI output. This option is especially useful
for HDMI monitors that don’t accept more than two audio channels. If you
choose to output two audio channels, MXO2 will output the audio pair
mapped to
HDMI 1/2.
6 Select Attenuate analog audio by 4dB to decrease the level of the audio
that is output from the MXO2 analog outputs by 4dB.
Matrox 4VANC capture and playback
¦NoteMatrox 4VANC capture and playback is available on Matrox MXO2,
MXO2 Rack, and MXO2 LE only.
The Matrox 4VANC tool lets you capture and play back AFD (active format
description) and digital closed caption data, along with your video, using audio
tracks 15 and 16, respectively. This section describes Matrox 4VANC, as it
applies to AFD and closed captioning, and details how to enable these features on
MXO2.
Matrox 4VANC AFD capture and playback
¦NoteMatrox 4VANC AFD is available on Matrox MXO2, MXO2 Rack, and
MXO2 LE only.
If you have an SDI video source that contains AFD (active format description)
data in the VANC (vertical ancillary data space), Matrox 4VANC lets you
preserve the data during capture, maintain the data during playback and export to
disk, and restore the data during output. When using a video application such as
Final Cut Pro or Matrox Vetura Capture, Matrox 4VANC captures the AFD data
as an audio track using MXO2’s SDI input, along with the video. The Matrox
4VANC audio track that contains the AFD data can then be used in a video
application, such as Final Cut Pro or Matrox Vetura Playback (see Chapter 11,
“Using Matrox Vetura Capture and Vetura Playback”), to play back the AFD data
through MXO2’s SDI output.
Matrox 4VANC preserves the SDI VANC AFD data during capture by encoding
the data into the audio stream using audio track 15. The resulting file is an
uncompressed 24-bit 48 kHz audio file that contains the AFD data. When using
MXO2’s SDI input for capture, you can choose to use audio track 15 to preserve
the AFD data that is in your source video’s VANC. Because audio track 15 is