Installation & User Manual - Oncam C-12 Series
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Oncam Global Group AG, 2021. All rights reserved.
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Figure 203 Media Profile StreamLite Compression
5.3.1.6.12.1
Dynamic Regions of Interest (ROI)
Dynamic Regions of Interest compression uses the analytics engine to identify the important
areas in the scene and encodes these areas at higher quality than the background. The higher
quality level applied is determined by the %
value set under
Fixed Quality
bit rate control in
the Media Profile, accessible via
Video/Audio > Media Profile > Fixed Quality > Quality
.
Use the toggle to enable Dynamic ROI and then select your compression level.
Advanced settings and configuration for this feature are available
via
Video/Audio > Global
StreamLite Compression
.
5.3.1.6.12.2
Compression Level (ROI)
Three Dynamic ROI compression levels are available:
- Low: maintains the best image quality with some reduction in bandwidth.
- Balanced: delivers an impressive image with increased bandwidth savings, this is the default
setting.
- Best: provides good image quality with significant bandwidth savings.
In all modes the Regions of Interest remain unaffected by the compression.
5.3.1.6.12.3
Dynamic GOP Length
Dynamic GoP Length extends the gap between each beginning I-frame of a group of pictures
in the video stream when there is little or no motion in the scene, achieving good bit rate
reduction. It will send I-frames less frequently (up to a user defined limit) when there is no
motion in the scene, as videos with limited motion require fewer detail intensive I-frames, but it
will automatically revert to the original GoP length when motion is detected to ensure no loss of
detail.
Use the toggle to apply Dynamic GoP and select your GoP Maximum length.
Advanced settings and configuration for this feature are available via
Video/Audio > Global
StreamLite Compression
.