Dahua NVR1A-4P Series User Manual

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Channel
Please select a channel from the dropdown list.
Video enable
Check the box here to enable extra stream video. This item is
enabled by default.
Code stream
type
It includes main stream, motion stream and alarm stream. You
can select different encode frame rates form different recorded
events.
System supports active control frame function (ACF). It allows
you to record in different frame rates.
For example, you can use high frame rate to record important
events, record scheduled event in lower frame rate and it allows
you to set different frame rates for motion detection record and
alarm record.
Compression
Video encode mode.
 H.264: Main Profile encode mode.
 H.264H: High Profile encode mode.
 H.264B: Baseline Profile encode mode.
 H.265: Main Profile encode mode.
 MJPEG: System needs high bit streams to guarantee
video definition. Use the recommended max bit stream
value to get the better video effect.
Smart Codec
This function is to reduce bit streams.
Note
 Some series products support smart codec function.
 After changing smart code, please reboot network
camera and some network camera functions (such as
IVS, ROI, SVC, lobby mode and etc.) becomes null.
Please think twice before the operation.
Resolution
The resolution here refers to the capability of the network
camera.
Frame Rate
The video frame amount displayed in each second. The higher
the frame rate is, the clearer and more fluent the video is. The
frame rate may vary depending on the resolution.
Bit Rate
 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.
Bit rate type
System supports two types: CBR and VBR.
 Main stream: It is to set frame rate to change video
quality. The higher the frame rate is, the better the video
quality is. The referenced bit rate is the recommended
value.
 Sub stream: In CBR mode, the bit stream is near the
specified value. In VBR mode, the video quality changes

Dahua NVR1A-4P Series Specifications

General

Brand	Dahua
Model	NVR1A-4P Series
Category	DVR
Language	English