Dahua Network Camera Web 3.0 Operation Manual page 48

Dahua Network Camera Web 3.0 Operation Manual
Parameter
Sub Stream Enable
Smart Codec
Encode mode
Resolution
Video Clip
Frame Rate (FPS)
Bit Rate Type
Recommended Bit
Bit Rate
Function
Select "Enable" to enable sub stream.
The device supports enabling sub stream 1 and sub
stream 2 at the same time.
It can enhance image compression performance and
reduce storage space by enabling intelligent encoding.
Note:
After intelligent encoding is enabled, the device will not
support third stream, ROI or intelligent event detection,
please refer to the actual interface for more details.
There are five options: H.264 (main profile standard,
H.264H (high profile standard), H.264B (Baseline
Profile), H.265 (main profile standard) and MJPEG
encode.

The H.264, H.264H both are H264 bit stream.
H.264 is the Main Profile encode and you need to
enable the sub stream function in your camera and
set the resolution as CIF. Then you can monitor via
the Blackberry cell phone.

The H.265 is the main profile encode mode.

MJPEG: In this encode mode, the video needs to
large bit stream to guarantee the video definition.
You can use the max bit stream value in the
recommend bit to get the better video output effect.
There are multiple resolutions. You can select from the
dropdown list.
For each resolution, the recommended bit stream value
is different.
Note: When video is under rotating status, you cannot
set resolution higher than 1080P (excluding 1080P).
The function is only supported by sub stream 2, please
refer to "Video Clip" for more details below the sheet.
PAL: 1～25f/s，1-50f/s NTSC: 1～30f/s or 1~60f/s.
The frame rate may vary due to different resolutions.
There are two options: VBR and CBR.
Please note, you can set video quality in VBR mode.
Under MJPEG mode, only CBR is available.
Recommended bit rate value according to the resolution
and frame rate you have set.

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.

Please refer to recommend bit rate for the detailed
information.
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