351
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
according to the bit stream value. But its max value is
near the specified value. Reference bit rate: The
reference bit rate depends on the resolution and frame
rate you set.
Reference bit
rate
Recommended bit rate value according to the resolution and
frame rate you have set.
I Frame
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.
Summary of Contents for NVR1A-4P Series
Page 1: ...Dahua Network Video Recorder User s Manual V 4 3 0 ...
Page 142: ...128 Figure 3 11 3 6 12 NVR42V 8P Series Please refer to Figure 3 12 for connection sample ...
Page 143: ...129 Figure 3 12 ...
Page 157: ...143 Figure 4 15 Step 2 Click device display edit interface See Figure 4 16 ...
Page 220: ...206 Figure 4 93 Figure 4 94 ...
Page 240: ...226 Figure 4 110 Figure 4 111 Figure 4 112 ...
Page 251: ...237 Figure 4 123 Figure 4 124 ...
Page 253: ...239 Figure 4 126 Click draw button to draw the zone See Figure 4 127 ...
Page 257: ...243 Figure 4 130 Click Draw button to draw a zone See Figure 4 131 Figure 4 131 ...
Page 262: ...248 Figure 4 136 Click draw button to draw the zone See Figure 4 137 ...
Page 275: ...261 Figure 4 148 Figure 4 149 ...
Page 276: ...262 Figure 4 150 Figure 4 151 ...
Page 387: ...373 Figure 5 60 Figure 5 61 ...
Page 388: ...374 Figure 5 62 Figure 5 63 ...
Page 412: ...398 Figure 5 96 Figure 5 97 ...
