Axis Communications Video Server AXIS 241SA - Manual (Page 20)

20 AXIS 241QA/AXIS 241SA - Video & image settings
The MPEG-4 standard provides many different coding tools for various applications in
different situations. As most MPEG-4 clients do not support all of these tools, it is usual to
instead define and use subsets for different clients or groups of clients. These settings allow
you to define the type of viewing client to use.
Adjusting the maximum bit rate and setting it to variable or constant is a good way of
controlling the bandwidth used by the MPEG-4 video stream.
MJPEG
Sometimes the image size is large due to low light or complex scenery. Adjusting the
maximum frame size helps to control the bandwidth and storage used by the MJPEG video
stream in these situations. Defining the frame size as Unlimited provides consistently good
image quality at the expense of increased bandwidth and storage usage during low light.
Limiting the frame size optimizes bandwidth and storage usage, but gives poor image
quality. To prevent increased bandwidth and storage usage, the maximum frame size
should be set to an optimal value.
For more information on these advanced settings, please see the online help.
Quad stream settings
A Quad stream enables you to monitor all channels at the same time. Instead of having
four Internet Explorer windows open, you can have just one window open with the Quad
view. You can edit this view with the desired stream time, frame rate, and text overlay.
These settings are the same as the Image Settings. See page 18.
Overlay/Mask settings
Overlay/Mask type
Overlay/Mask type allows you to place
an overlay, or up to three privacy
masks over the video image:
• Upload and place an image as
an overlay - usually used to
provide extra information in
the video image.
• Place up to three configurable
privacy masks to conceal dif-
ferent areas of the video
image.
Selecting the overlay/mask type from the menu will display further settings available for
the selected type. See the online help for further information.
Note:
A privacy mask cannot be bypassed, but an overlay image can be bypassed with the help of the VAPIX® API.
Text
overlay
Image
Overlay