VIVOTEK - Built with Reliability
User's Manual - 79
The Video page determines the Liveview and recording streams of individual cameras in terms
of compression format, video resolutions, frame rate, and the constant bit rate settings.
The constant bit rate setting is especially important
in that the sum of bandwidth consumed
for all recording streams must not exceed the
96Mbps
threshold. The constant bit rate is like an
upper threshold placed on each video stream. The size of IP packets delivered from the network
camera will be maintained within the bit rate limitation.
If you configured a RAID5 volume as recording storage, the bandwidth threshold will be
48Mbps
.
3-3-2. Camera - Video
1.
Video compression
: The supported formats are: MPEG-4, H.264, and SVC.
The MJPEG
format is not supported.
If you change the bit rate and resolution settings of a camera,
the configuration applies to the camera firmware settings on its individual video stream. If a
camera becomes disconnected, your configuration change will not take effect util the camera
come online again.
2.
Video resolution
: The applicable video resolutions comes available in a pull-down menu. For
different cameras, the applicable resolutions can vary.
3.
Frame rate
: The applicable frame rate also varies from camera to camera. The list of
applicable frame rates is polled from individual cameras.
4.
Constant bit rate
: This places an upper threshold to limit the bandwidths consumed for live
viewing and recording streams. If "---" (not available) is shown, your camera stream might
have been configured using a "fixed quality" setting. You may need to open a web console
with it to convert the camera stream to be using the constant bit rate setting.
