Camera - Video - Vivotek ND8322P User Manual

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5-3-2. Camera - Video

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 32Mbps 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.
By default, Stream 1 is the recorded stream, the NVR uses Stream 2 for live viewing.
1. Type: The supported formats are: MJPEG, H.264, and SVC.
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. Frame size: The applicable video resolutions comes available in a pull-down menu. For
different cameras, the applicable resolutions can vary.
3. Maximum frame rate: The applicable frame rate also varies from camera to camera. The list
of applicable frame rates is polled from individual cameras.
4. Intra frame period: This indicates the I-frame insertion period. Default is 1 second.
5. Video Quality:
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.
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The MPEG-4 format is not