User guide

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Chapter 7, Configuring Your MXO2 System
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 AFD from audio track
15
to retrieve the Matrox 4VANC AFD data from audio track 15 in your
video application, and play back the video with the AFD data restored to the
VANC using MXO2’s SDI output.
5 Specify the appropriate settings in your video application. For information
on how to set your Final Cut Pro settings to capture, play back, and export
Matrox 4VANC AFD, see “Specifying settings for Matrox 4VANC AFD” on
page 90.
Matrox 4VANC closed caption capture and
playback
¦NoteMatrox 4VANC closed caption is available on Matrox MXO2, MXO2
Rack, and MXO2 LE only.
If you have an SDI video source that contains digital closed caption data in the
VANC (vertical ancillary data space), Matrox 4VANC lets you capture the closed
caption data as an audio track using MXO2’s SDI input, along with the video.
The Matrox 4VANC audio track that contains the closed caption 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
closed captioning through MXO2’s SDI or analog output.
Matrox 4VANC preserves the SDI VANC closed caption data during capture by
encoding the data into the audio stream using audio track 16. The resulting file is
an uncompressed 24-bit 48 kHz audio file that contains the closed caption data.
You can also create a Matrox 4VANC closed caption audio file using supported
captioning software, such as CPC MacCaption. You can add a Matrox 4VANC
closed caption audio file to any project timeline in your video application, or
transport and store the audio file on any video/audio device as an audio track.
When using MXO2’s SDI input for capture, you can choose to use audio track 16
to preserve the closed caption data that is in your source video’s VANC. Because
audio track 16 is used for capturing closed captioning, that channel will not be
available for capturing audio.
¦NoteClosed caption data that is present in line 21 of a video’s VBI (vertical
blanking interval) is not transferred to an audio track because it is captured by
MXO2 as part of the video signal.
When using MXO2’s SDI or analog output for playback, you can choose to
retrieve and output the Matrox 4VANC closed caption data from your video
application. The closed caption data is retrieved from audio track 16 and output
using MXO2’s SDI or analog output. When Matrox 4VANC is being used, track