ViewCast Osprey PCI, User Manual

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Osprey PCI User Guide
ViewCast 51
The Extras dialog box has the following controls.
Timecode Video Marking Refer to the Vertical Interval Timecode (VITC) section of this guide for
more information.
Vbi Pin (Osprey 5x0 only) The Osprey 5x0 boards do not provide full Vertical Blanking Interval
(VBI) support, and do not normally expose a VBI pin. Windows Media
Encoder 9, however, has a Closed Captioning scripting capability that
requires a workaround. Although this application connects to the
driver’s Closed Caption Pin for delivery of actual Closed Caption data, it
looks for VBI pin in its capability enumeration phase. This control
directs the driver to expose a logically correct but non-functioning VBI
pin so that the WME9 scripting capability can be used. We recommend
hiding the VBI pin for other applications, since no valid VBI data will be
delivered. Changes to this setting only take effect when you restart the
device either with the system’s Device Manager, or by rebooting the
system.
Closed Caption
Timestamping This control is a workaround to a problem in DirectShow with capture
of CC to AVI files. As a practical matter, always use the Normal setting.
Processor Assignment This control is relevant only on machines with two or more processors,
and with two or more Osprey devices of a particular class (Osprey 2x0,
300, 440, 5x0) installed. On single processor machines, this control is
grayed. Leave this control set to the upper
usually recommended
button. There are a few machines where the alternative setup has
helped. The symptom of a problem that might be helped by this
setting is that processing is assigned unevenly among the processors.
Changes made to this control will take effect when you restart the
machine.
PCI Compatibility Mode This control is relevant only to very old machines that have the
indicated chipsets. You can try them if you are seeing drops of a
significant amount of audio and/or video data. The change will take
effect immediately.
Help Click Help to access the user guide.
Close Click Close to close the window.
Timecode Video Marking
Refer to the Vertical Interval Timecode (VITC) of this guide for more information.
Closed Caption Timestamps
This control performs a workaround for what we currently believe to be a problem in DirectShow
with capture of CC to AVI files. If you attempt to capture a CC character pair stream along with a
video stream to an AVI file with Normal timestamping, the file will become extremely large and the
capture will fail within a few seconds. AVI-Compatible mode allows capture of CC to AVI.