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Menu Reference
The “Streaming” Tab
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LBR (Low Bit Rate)
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.
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Compression
Based on the current application area and streaming bit rate, select the most suitable
compression level, high/mid/low.
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Set High, and bit rate will vastly be reduced; however, image quality may be
degraded at the same time.
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Set Low, and bit rate will stably keep low while image quality remains high.
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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 bit rate, especially for scenes with minor
changes. The length of Dynamic GOV is from GOV Length to Max. GOV (4094).
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Select Enabled and set Max. GOV. Then click on Save to activate the setting.
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If there is small or zero activity in the scene, set Max. GOV larger, the GOV length
will be longer, resulting in lower bit rate and bandwidth.
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If there are constant dynamic changes in the scene, it is suggested just adjust
GOV Length and disable Dynamic GOV.
Click on Save to apply and store the settings.
Bit Rate
The default setting of the H.265/H.264 bit rate for Stream1 to Stream5 is 12288 kbit/s. The setting
range is from 64 to 20480 kbit/s, and the total bit rate should not exceed 131072kbit/s.
GOV Length
You can set the GOV length to determine the frame structure (I-frames and P-frames) in a video
stream to save bandwidth. Less bandwidth is needed if the GOV length is set to a high value.
However, the shorter the GOV length, the better the video quality is.
The default setting for Stream1 to Stream5 is 30. The setting range of the GOV length is from 1 to
4094.
Q (Quality) Factor (MJPEG Only)
The default setting of MJPEG Q factor is 35; the setting range is from 1 to 70.
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