Firmware User Manual
51
Depending on the camera model, the number of available resolutions may
be different. The default resolution setting of the camera may not
necessarily be the maximum resolution of the camera. If the user wants to
use the maximum resolution, it is possible to do it here. The maximum
possible resolution of the stream 2 will be smaller than stream 1.
Defines the amount of frames per second.
Video Bit Rate Mode
(only for H.264)
Under “Constant Bit Rate” mode (CBR), the camera keeps the stable bitrate
regardless of the complexity of the scene. Under this mode, the video
quality may vary if the bit rate value is set too low. It is easier to do storage
and network bandwidth consumption estimations under this mode
compared to Variable Bit Rate mode.
Under “Variable Bit Rate” mode (VBR), the camera will keep the video
quality stable while the bit rate may occasionally go up or down, depending
on the complexity of the scene.
Video Max Bit Rate
(only for H.264)
Defines the upper limit of the bitrate (only available under CBR mode). The
bitrate will be floating slightly under that limit. For example, if the limit is
set as 2M, the bitrate will be floating around 1.6~2.0 Mbps.
If the Video Max Bit Rate is chosen as
“Unlimited”, then the “Video Bit Rate”
selection box will appear that defines the
bit rate level.
Video Bit Rate
(only for H.264)
Under CBR mode, when Video Max Bit Rate is chosen “Unlimited”, the user
can define the AVERAGE bit rate. For example, if the Video Bit Rate is
chosen 2M, then occasionally, the actual bit rate may go below or beyond
2M, but in the long run, the average bit rate will be very close to 2M. This
mode allows the most accurate storage estimations, however, while
planning the bandwidth, please consider the occasional peaks of bit rate.
H.264 Compression:
Under VBR mode, the bit rate will be
floating while the video quality will be
stable and follows the quality standard
set by the user. The user can choose
either “High”, “Medium” or “Low” quality. The higher is the quality level,
the more bit rate the camera will use to achieve the target quality.
MJPEG Compression:
The user can define the quality with the numeric scale from 1 to 100. The
default MJPEG quality is 60. The higher is the quality level, the more bit rate
the camera will use to achieve the target quality.
(101 Seiten)
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