ViewCast Osprey PCI, Руководство пользователя

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Setting Driver Properties
32 ViewCast
Reference Size for Crop and Logo Placement
These fields are read-only because you do not set it directly – rather, it shows the results of more
fundamental settings made elsewhere in the dialog box.
Figure 21. Reference Size for Crop and Logo Placement
The settings shown by the 525-line / 625-line buttons reflects the video standard selected in the
Input or Video Decoder tab. NTSC formats result in 525-line, 29.97 frame per second video. PAL
(other than -M) and SECAM formats result in 625-line, 25 frame per second video.
The Height and Width boxes show the size of the incoming video based on all the settings you have
made. In particular, they reflect the video standard (NTSC, PAL, or SECAM) that you have selected on
the Input Property Page, and the setting in the adjacent Horizontal Format group.
525-Line (NTSC) Vertical Format
This control is only meaningful for NTSC users. It has no effect for PAL and SECAM 625-line video
standards.
Figure 22. 525-Line (NTSC) Vertical Format
Select 480-lines for all normal applications. Select 485-line video for specialized applications.
When you select 480-line, you can select which of three video lines should be the top line of
displayed or captured video. Lines 21 and 284 are used for Closed Caption in films and broadcast
video. Lines 22 and 285 are sometimes used for ancillary data in broadcast video. If these lines are
used for data, they will appear as moving bands or streaks across the top lines. Therefore, the most