Digital Watchdog Compressor DW-CP16 User Manual page 67

DW-CP16 Compressor™ User Manual
Video Max Bit Rate
(H.264 Only)
Video Bit Rate
(H.264 Only)
Quality
GOP 1 I-frame
(H.264 Only)
Digital Watchdog®
Under Variable Bit Rate mode (VBR), the device will keep the video
quality stable while the bit rate goes up or down, depending on the
complexity of the scene.
Defines the upper limit of the bitrate (if CBR mode is selected). The
bitrate will be floating slightly under that limit.
level.
Under CBR mode, when Video Max Bit Rate is chosen Unlimited, the
user can define the AVERAGE bit rate. This mode allows the most
accurate storage estimations, however, while planning the
bandwidth, please consider the occasional peaks of bit rate.
H.264 Compression:
quality. The higher the quality level, the more bit rate the device will
use to achieve the target quality.
MJPEG Compression:
The user can define the quality from 1 to 100. The default MJPEG
quality is 60. The higher the quality level, the more bit rate the device
will use to achieve the target quality.
The GOP length is the occurrence rate of I-frames. By default, there
is one I-frame per second. For example, in case of 30fps, there will be
1 I-frame and 29 P-frames. When the GOP is changed to "1 I-frame
per 5 seconds", then there will be one I-frame, followed by 149 P-
frames. In case of a static scene, long GOP can reduce bandwidth and
storage consumption.
67
If the Video Max Bit Rate is chosen as
Unlimited, the Video Bit Rate
selection box will define the bit rate
Under VBR mode, the bit rate will
be floating while the video quality
will be stable. The user can choose
either High, Medium or Low
www.digital-watchdog.com