Verint Nextiva S4200-2V-BZ, Руководство пользователя

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Verint Video Intelligence Solutions 79
Nextiva S4200 Series User Guide
6. In the Minimum Quantizer box, enter the high video quality boundary. The lower the
value, the higher the video quality and the file size. The value range is from 2 to 31.
7. In the Maximum Quantizer box, enter the low video quality boundary. A higher
quantizer value means less video quality but a smaller file size. The value range is from
2 to 31.
8. In the Input Filter Mode list, select the level of filtering applied to the video signal
before it is encoded, helping to remove high frequency noise from lower quality
cameras or noisy video feeds. The available values are Low, Medium, High, or None.
9. In the Noise Reduction Filter Mode list, select the filtering of small variations in
pixels in otherwise motionless sections of the video, to be used in all conditions to
reduce the bit rate. Using this filter also helps reduce the number of false alarms in low
light conditions. The available values are Low (default), Medium, High, and None.
10. In the Resolution list, select the measure of how clear and crisp the video image
appears. Each resolution corresponds to a specific number of pixels (columns * lines)
for each picture of the video sequence. The available resolutions are: QCIF, CIF, 2CIF,
4CIF, All lines, 2/3 D1, and VGA.
11. In the Rate Control Mode list, select the mode controlling the bit rate variation. The
available modes are:
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CFR (Constant Frame Rate)—This mode maintains the target frame rate. Video
quality may suffer and the bit rate may exceed the target value.
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CBR (Constant Bitrate)—This mode is the most effective to maintain the target bit
rate. Video quality may suffer (frames may be skipped) and the frame rate may
decrease. This mode should be used when transmitting video over networks that
have very limited bandwidths, and with an intra-interval value of 0.
†
CSR (Constant Storage Rate)—This is the optimized mode, based on CBR, to be
used for the Nextiva enterprise video management software to make good use of
the storage capacity.
12. In the Web Multicast IP Address box, enter the IP address of the multicast group
from which the web interface will get live video, if the web streaming method is
Multicast UDP (see page 88). This parameter applies to Input 1/Encoder 1 only.
13. In the Web Multicast IP Port box, enter the IP port of the multicast group from which
the web interface will get live video, if the web streaming method is Multicast UDP (see
page 88). This parameter applies to Input 1/Encoder 1 only.
14. In the Intra Interval box, enter the frequency at which a complete video frame (called
I-frame) is sent by the encoder. The available values are in the 0–1000 range. A value
of X means that a complete image refresh will occur every X frames.
15. In the Frame Format list, select the way the video fields are compressed. The
available values are:
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Field over Field—The proprietary mode used by the Nextiva edge devices.
†
Interlaced Frame—The MPEG-4 compliant mode where the two video fields are
interlaced.
Tip: It is not recommended to use a value of 0.