CCTV Camera Pros Geovision 8.4 Multicam Digital Surveillance System - Manual (Page 41)

Configuring Main System
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1.2.5 Geo Mpeg4 Advanced Settings
The Geo Mpeg4 codec supports a number of advanced settings that allow experienced users to adjust
the encoding process.
In Figure 1-12, check the Apply Advanced Codec Setting option, click the button beside, and
then click the Advanced tab. This window appears.
Figure 1-14
[Setting]
„ Setting: Click the drop-down list to select High speed, Recommend, or High compression rate
for default configurations. Or, select User-defined to define encoding settings yourself.
„ Subpixel precision: Click the drop-down list to select Full, Half or Quarter pixel.
Full pixel: Fastest compression speed, medium compression rate, and normal image quality.
Half pixel: Fast compression speed, high compression rate, and better image quality.
Quarter pixel: Slow compression speed, highest compression rate, and better image quality.
„ Quantizer: Raising the value will improve compression speed and dramatically increase
compression rate, but reduce image quality.
„ Inter-frame threshold: Raising the value will improve compression speed and rate, but reduce
image quality slightly.
„ Max. keyframe interval: Raising the value will extend the duration between key frames and
increase compression rate, but reduce image quality slightly. Compression speed remains the
same.