
Software User’s Manual Ver.A1D-502-V8.03.30-NB
66
Parameters
Description
H.264 Profile
(available only if the
Encoder type is
H.264.)
The H.264 Profile defines the video compression scheme: High
Profile, Main Profile, and Baseline. These schemes vary from least
compressed, Baseline, to most compressed, High Profile. By
default, the H.264 Profile is High Profile, which provides the most
compression with the best video quality, but more computing power.
Some third-party video management system has longer latency or
takes more time to decode High Profile compression scheme, in this
case, you can select Main Profile or Baseline. In order to get the
same video quality, you can select a higher bit rate with lower
compression; this is the same as having a lower bit rate with a High
Profile. For example, a video on High Profile with 2M bit rate will
have the same video quality as a video with Baseline Profile at 3.5M
bit rate.
Resolution
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 and so on.
Frame Rate
Defines the amount of frames per second.
Video Bit Rate Mode
(available only if the
Encoder type is
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
(available only if the
Encoder type is
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.