Operation Manual

Niagara SCX and SimulStream
116 ViewCast
Show N filters per device
With the Show N filters per device control (Figure 101) you can set up the driver to expose 1 to
9 filters per device for applications to specify and select. If, for example, you choose four filters
per device, device lists in applications show four entries for the current device. For device 1, the
system designates them as 1.1, 1.2, 1.3, and 1.4.
Figure 101. Show filters per device
This global setting affects all the Osprey-2XX, -300, -440 or -530/540/560 devices as a group.
IMPORTANT! When you apply this change, a message box prompts you to restart
the system. You must do this. The number of filters you request do not display
or work correctly until you restart the system.
While it is possible to expose and specify up to 9 filters per device, the practical number of
working filters equates to less than this. The practical number of filters depends on:
 Capability of the system
 Types of filtering turned on in the driver
 Types of scaling and color format conversions requested in the driver
 Type of processing the downstream application performs
When you directly render video to the window, the video format and type of renderer used can
make a major difference in system performance and in the number of possible streams. If
multiple capture devices exist in the system, the number of filters equals the total across all the
devices. In addition, some types of processing, such as de-interlacing and gamma correction,
performed once per device may occur multiple times. A high-end, multi-core, or multiprocessor
system can support 5, 6, or more concurrent filters on one device if the processing per filter
remains light; but only 2 or 3 if the processing loads inside or outside of the driver becomes
particularly heavy.