Operation Manual

Niagara SCX and SimulStream
114 ViewCast
WARNING! If you enable or disable SimulStream after you save an encoder profile, you could disable
the profile you saved.
For instance, if you save a profile using Capture Device 1, then enable SimulStream, Niagara SCX
no longer recognizes Capture Device 1 but sees Capture Device(s) 1.n instead.
You see a red X designating a non-recognized capture device by that profile and must reselect your
input device to Capture Device 1.n to clear the red X and use the profile.
Filters
From a practical point of view, 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.
o You can set up the driver to show 1 to 10 filters per device.
o Each filter has one preview pin and one capture pin.
o 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, watermarks, and
captions that you can store between sessions.
Note: Compared to the previous pin-based method, no requirements exist for a
particular startup order, to associate settings with instantiations.
If you are familiar with GraphEdit, you can best visualize SimulStream filters where you:
 Construct a multifilter graph with GraphEdit.
 Apply different crop, watermark, and caption settings to each filter.