NOTE: Please make sure the higher compression ratio is supported by
the system before setup.
Rate Control
There are three kinds of H.265/H.264 bit rate modes provided: CBR (Constant
Bit Rate), VBR (Variable Bit Rate) and LBR (Low Bit Rate).
⚫ CBR
The sent-out video bitrate will be fixed and consistent to maintain the
bandwidth.
⚫ VBR
Video bitrate varies according to the activity of the monitoring
environment to achieve better image quality.
⚫ LBR
LBR keeps low bitrate and ensures superior image quality. To implement
LBR control, setup the compression level and dynamic GOV for each
streaming accordingly beforehand.
- Compression
Based on the current application area and streaming bitrate, select
the most suitable compression level, high/mid/low.
Set <High>, and bitrate will vastly be reduced; however, image
quality may be degraded at the same time.
Set <Low>, and bitrate will stably keep low while image quality
remains high.
- Dynamic GOV
According to the amount of motion in the application area, the GOV
length of the video will be adjusted dynamically to reduce more
bitrate, especially for scenes with minor changes. The length of
Dynamic GOV is from <GOV Length> to <Max. GOV> (4094).
Select <Enabled> and set <Max. GOV>. Then, click on <Save> to
activate the setting.
If there is small or zero activity in the scene, set <Max. GOV> larger,
the GOV length will be longer, resulting in lower bitrate and
bandwidth.
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