ViewCast Osprey-300, Руководство пользователя, Страница: 94 / 102

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Osprey-300 User’s Guide
Selecting a format here causes CropApp to use
that format for its own rendering, but it does not
cause that same color format to be selected in
your application. In only ensures that your crop
size will work with that color format when it is
used.
We are finding that the default I420 codec will
not render many output sizes, so when I420
granularity is selected, CropApp will observe
the I420 granularity rule but render the video
as YUY2. Since you may see this problem in
other applications, CropApp puts up a reminder
message when it encounters this situation.
If you exit CropApp with the crop Enabled,
that is, the center checkbox checked, the crop
parameters will be set in the driver for any other
application to use. If you exit CropApp with the
crop disabled, the crop parameters will be set for
other applications to use, but cropping will not be
enabled until it is turned on as a separate step.
CropApp requires that the filter OverlayRect.
ax be present on the system. The driver setup
program installs this filter.
L
OGO
A
PP
LogoApp (figure 9) interactively positions and
resizes a logo on live video. The functionality is
similar to that of the driver’s Logo property page,
but you can place and size the logo by dragging
its center, sides, or corners directly on live video.
The control bar across the top allows you to
Enable/Disable logo display and select the 24-bit
.BMP logo file. You can size and place the logo
graphically on the video, or you can directly edit
the top/left/height/width boxes. Use the Size
1X button to snap the logo to its original size.
The Colors… button brings up a dialog to enable
color keying, select the key color, and enable
translucent mode.
The Size menu allows you to select full or half-
size video. The Device menu displays a list of
enabled devices and provides access to the
selected device’s property pages.
The LogoApp Application window 9