HIKVISION DS-2CD6425G1-20

Note
Up to 32  and symbols (except &, <, >, ', or ") are allowed for the stream name.
3.
Customize the stream parameters  frame rate, max. bitrate, video encoding).
4.
 Add stream  as needed.
5.
 If a custom stream is not needed, click to delete it.
6.
Click Save.
4.1.2 Video Type
Select the content (video and audio) that should be contained in the stream.
Video
Only video content is contained in the stream.
Video & Audio
Video content and audio content are contained in the composite stream.
4.1.3 
Select video  according to actual needs. Higher  requires higher bandwidth and
storage.
4.1.4 Bitrate Type and Max. Bitrate
Constant Bitrate
It means that the stream is compressed and  at a   bitrate. The
compression speed is fast, but mosaic may occur on the image.
Variable Bitrate
It means that the device  adjust the bitrate under the set Max. Bitrate. The
compression speed is slower than that of the constant bitrate. But it guarantees the image
quality of complex scenes.
4.1.5 Video Quality
When Bitrate Type is set as Variable, video quality is  Select a video quality according
to actual needs. Note that higher video quality requires higher bandwidth.
Network Camera User Manual
12