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User's Manual
84
Parameter Description
Resolution
The higher the value, the clearer the overall image. For each resolution,
the recommended bit stream value is different.
The resolution of sub stream cannot be greater than that of main
stream.
Frame Rate (FPS)
The higher the value, the smoother the video image. The frame rate
might vary due to different resolutions.
Bit Rate Type
You can select from
VBR
(variable bitrate) and
CBR
(constant bitrate).
●
VBR
: Gives the best balance between quality and file size as the
bitrate can be altered depending on the video.
●
CBR
: Keeps the bitrate the same during encoding, and we
recommend you use this bitrate type when the network connection
is limited to performing at, for example, 320 Kbps.
Quality
6 quality levels are available. The higher the value, the better the quality.
You need to configure the image quality when
Bit Rate Type
is set to
VBR
.
Bit Rate(Kb/S)
Higher bit rate signifies greater image or video quality, but also occupies
more storage space.
You need to configure the bit rate when
CBR
is set to
Bit Rate Type
.
Max. Bit Rate It is the upper limit of stream in VBR. In CBR, the value is fixed.
I Frame Interval
The number of P-frame between two I-frames. The number varies
according to the bit rate. The range is 12–150. We recommend you
configure the value to be twice the amount of the bit rate.
Watermark
You can verify the watermark to check whether the video has been
tampered.
Select the
Watermark
checkbox to enable watermark verification. The
watermark character is
DigitalCCTV
by default.
Watermark character consists of up to 85 characters with numbers,
letters and underlines.
Enable
Enable sub stream when your network bandwidth is insufficient or other
conditions influence the video smoothness in main stream.
Step 3 Click
Save
.
4.5.2.2.2 Configuring ROI
Set the region of interest in the image, and then the selected region will be displayed with the
configured quality.
Step 1 Select
Setting
>
Camera
>
Video
>
ROI
.
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