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– Bitrate control:
The bit rate can be set as Variable Bit Rate (VBR) or Constrained Variable Bit Rate
(CVBR). VBR adjusts the bit rate according to the image complexity, using up bandwidth
for increased activity in the image, and less for lower activity in the monitored area.
Limiting the maximum bit rate helps control the bandwidth used by the H.264 video
stream. Leaving the Maximum bit rate as unlimited maintains consistently good im-
age quality but increases bandwidth usage when there is more activity in the image. Lim-
iting the bit rate to a defined value prevents excessive bandwidth usage, but images are
degraded when the limit is exceeded.
·
VBR:
unlimited maximum bitrate.
·
CVBR:
VBR with maximum bitrate which is set in
Bitrate
.
– Bitrate:
Maximum bitrate for CVBR in the range of 100kbps
∼
8Mbps.
This is disabled if Bitrate control is set to VBR.
– Frame rate:
Upon the real-time play, users should select a frame refresh rate per second. If the rate
is high, the image will become smooth. On the other hand, if the rate is low, the image
will not be natural but it can reduce a network load.
– GOP size:
Select the GOP (Group of Picture) size. If users want to have a high quality of fast
image one by one, please decrease the value. For the purpose of general monitoring,
please do not change a basic value. Such act may cause a problem to the system per-
formance. For the details of GOP setting, please contact the service center.
•
Stream 2 Setting:
Sometimes the image size is large due to low light or complex scenery. Adjusting the
frame rate and quality helps to control the bandwidth and storage used by the Motion JPEG
video stream in these situations. Limiting the frame rate and quality optimizes bandwidth and
storage usage, but may give poor image quality. To prevent increased bandwidth and storage
usage, the Resolution, Frame rate, and Frame Quality should be set to an optimal value.
– MJPEG Resolution:
Same as the stream 1 settings except the largest resolution,
2048x1536.
– MJPEG Frame rate:
Same as the stream 1 settings.
– MJPEG Quality:
Select the picture quality. If users want to have a high quality
of fast image one by one, please decrease the value. For the purpose of general
monitoring, please do not change a basic value. Such act may cause a problem
to the system performance.
•
Stream 3 Setting:
Same as the Stream 1 Setting, except for the resolution and bitrate
which are confined by stream 1 setting.
When the settings are complete, click
Save
button to save the settings, or click
Reset
button to clear
all of the information you entered without saving it.
