Matrox MXO2 Installation And User Manual page 88

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pulldown, you can still display the closed captions by selecting Enable
overlay on output
Under Video Output Display , select Enable overlay on output to overlay
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the closed captions on all the MXO2 video outputs, which lets you display
closed captioning on video monitors that don't have a closed captioning
feature. This option will be available only if closed captioning display is
enabled in the Adobe Premiere Pro Program Monitor menu.
Remarks
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Click OK to save your settings.
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Chapter 8, Using Matrox MXO2 with Adobe Premiere Pro
as explained below.
When Enable overlay on output is selected, the bit depth of your video
output is forced to 8-bit, and you won't be able to change the bit depth
setting on the Video Output page. Therefore, if you want to output 10-bit
video, you must clear this option before changing the bit depth setting for
your video output.
Selecting Enable overlay on output may cause dropped frames in your
video output. If you select this option and also choose to embed the closed
captioning in the video output, you should turn off the closed captioning
feature for all video monitors connected to the MXO2 video outputs to
avoid simultaneously displaying both the embedded and overlaid closed
captions.