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Setting Driver Properties
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Captions tab
The Osprey 240e/450e driver has four ways of delivering NTSC Closed Caption (CC) data:
It can render captions directly on to the video before it leaves the driver.
It can send decoded caption data to a DirectShow-compliant CC pin.
It can send the raw, undecoded Line 21 caption waveform to a DirectShow-compliant VBI
pin.
It can deliver decoded caption data to a proprietary interface that can be used by C++
developers.
The controls on the Captions tab (Figure 46) pertain mostly to item 1, Closed Captions on Video.
There is one control that affects item 2, Closed Caption DirectShow pin.
Figure 46. Captions tab