Dahua 3100 series, User Manual

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92
Figure 7-27
Please refer to the following sheet for detailed information.
Parameter Function
Channel
Here is for you to select a monitor channel.
Channel Name Here is to display current channel name. You can modify it.
Compression
H.264
Main Stream 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.
Extra Stream Select extra stream if you enabled the extension stream to monitor.
Audio/Video For the main stream, recorded file only contains video by default. You
need to draw a circle here to enable audio function.
For extra stream, you need to draw a circle to select the video first and
then select the audio if necessary.
Resolution
System supports various resolutions, you can select from the dropdown
list. For this model, main stream supports D1/CIF/QCIF. Please note
the resolution may vary due to different channels. The extra stream
supports CIF/QCIF.
Frame Rate
PAL
：
1
～
25f/s
；
NTSC
：
1
～
30f/s
Main stream: D1 (1~6/7fps)/CIF (1~25/30fps)/QCIF (1~25/30fps)
Extra stream: CIF 352×288/ 352×240(1-6/7 fps),
QCIF 176×144/176×120.
Bit Rate Type
There are two options: VBR and CBR.
Please note, you can set video quality in VBR mode only.
Quality
The value ranges from 1 to 6. The level 6 is the best video quality.
Bit Rate

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.
Recommended
Bit
Recommended bit rate value according to the resolution and frame
rate you have set.