HDCVI Standalone DVR User’s Manual
232
SVC
SVC is so called scaled video coding. Check the box to enable
this function. During the network transmission process, system
discards unimportant frames when the bandwidth is not
sufficient or the decode capability is low. It is to guarantee video
quality and transmission fluency.
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
Compression: System supports H.264H, H.264, H.264B, and
MJPEG.
H.264H: It is the High Profile compression algorithm. It has
the high encode compression rate. It can achieve high
quality encode at low bit stream. Usually we recommend
this type.
H.264 is the general compression algorithm.
H.264B is the Baseline algorithm. Its compression rate is
low. For the same video quality, it has high bit stream
requirements.
Resolution
System supports various resolutions, you can select from the
dropdown list. Please note the option may vary due to different
series.
Frame Rate
PAL
:
1
~
25f/s
;
NTSC
:
1
~
30f/s.
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.
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.
Audio encode
Please select from the dropdown list. There are three options:
G711a/G711u/PCM.
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