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Osprey 240e/450e User Guide
ViewCast 69
Post-Processing mode
The Osprey 240e/450e driver does more than simply move video from the hardware to the system. Its
Post-Processing facility includes a variety of filters, transforms, and renderers within the driver, and
supports the SimulStream option. Figure 62 depicts the Osprey Post Processing.
Figure 62. Post-Processing mode
Figure 62 assumes that SimulStream is activated so that more than two video pins are possible. In this
case there are four video output pins, represented by the yellow round rectangles:
The upper pin produces scaled and/or cropped I420 video, with a logo (watermark) and
NTSC Closed Captions rendered on the video.
The second pin produces scaled and/or cropped YUY2 video with a logo but no captioning.
In this particular graph, the upper two pins are scaled and cropping identically, so a single
scaling operation can service both pins.
The third pin has a different scale/crop specification, so its video runs through a separate
scaler/cropper. The video is captioned and converted to Rgb15.
The lower pin produces unscaled, uncropped D1 YUY2 video with no logo or captioning.
The video routed to all pins is in this example, deinterlaced and gamma-corrected. Deinterlace or
inverse telecine if used are always applied globally to all pins, as is gamma correction. Scaling, cropping,
logoing, captioning, and color format conversion are performed separately for each pin.
Post-processing mode has the following capabilities:
With SimulStream disabled, there is still a maximum of one capture pin and one preview pin
on the device at a time. However, there are no restrictions on combinations of video size
and rate, color formats, or crop settings. The driver color converts and copies video as
required to deliver up to 25 or 29.97 frames per second in any format to the two pins.