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Osprey 240e/450e User Guide
ViewCast 33
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Filters have two interrelated purposes:
They allow applications to enumerate and list DirectShow video capture and preview pins or
streams (each with different settings) as named entries in their video device select list. You
can set up the driver to show 1 to 10 filters per device. Each filter has one preview pin and
one capture pin. Standard applications can access a particular filter without any custom
programming specialized for Osprey devices.
Each filter has independent settings for cropping, default output size, logos, and captions
that can be stored between sessions. Compared to the previous pin-based method, there
are no requirements for a particular startup order, in order to associate settings with
instantiations.
SimulStream
Use the SimulStream control to enable SimulStream or SimulStream evaluation mode, and to specify
how many filters will be exposed.
Figure 32. SimulStream option
Enable SimulStream in the evaluation mode, and specify how many filters you plan to
expose.
SimulStream is enabled for the currently selected device.
Figure 33. SimulStream enabled
SimulStream is a purchased software option. It makes a single hardware device appear as several
separate devices capturing the same input stream. Each stream can have different size, color format,
frame rate, crop, logo, and captioning. You can have multiple video capture streams in a single
application, or multiple applications each with one or more capture streams.