Security Camera King DVR-CVI8240M User Manual page 181

Frame Rate
Bit Rate
Reference bit
rate
I Frame
Audio source
Watermark
enable
5.8.1.2.2 Snapshot
The snapshot interface is shown as in Figure 5-18.
Please refer to the following sheet for detailed information.
Parameter
Snapshot type
Image size
Quality
here refers to the capability of the network camera.
PAL：1～25f/s；NTSC：1～30f/s.

Main stream: You can set bit rate here to change video
quality. The large the bit rate is , the better the quality is.
Please refer to recommend bit rate for the detailed
information.

Extra stream: In CBR, the bit rate here is the max value.
In dynamic video, system needs to low frame rate or
video quality to guarantee the value. The value is null in
VBR mode.
Recommended bit rate value according to the resolution and
frame rate you have set.
Here you can set the P frame amount between two I frames. The
value ranges from 1 to 150. Default value is 50.
Recommended value is frame rate *2.
Please select from the dropdown list. There are two options:
Normal/HDCVI. In the normal mode, the audio signal comes
from the Audio In. In the HDCVI mode, the audio signal comes
from the coaxial cable of the camera.
This function allows you to verify the video is tampered or not.
Here you can select watermark bit stream, watermark mode and
watermark character. Default character is DigitalCCTV. The max
length is 85-digit. The character can only include number,
character and underline.
Figure 5-18
Function
There are two modes: Regular (schedule) and Trigger.

Regular snapshot is valid during the specified period you
set.

Trigger snapshot only is valid when motion detect alarm,
alarm or local activation alarm occurs.
tampering
It is the same with the resolution of the main stream.
It is to set the image quality. There are six levels.
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