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Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
3-20 Polycom, Inc.
Minimum Frame Rate Threshold for SD Resolution
The MINIMUM_FRAME_RATE_THRESHOLD_FOR_SD System Flag can be added and
set to prevent low quality, low frame rate video from being sent to endpoints by ensuring
that an SD channel is not opened at frame rates below the specified value. For more
information see "Modifying System Flags” on page 22-1.
H.264 High Profile System Flags (Version 7.0.1 only)
Setting minimum bit rate thresholds that are lower than the default may affect the video
quality of endpoints that do not support the H.264 High Profile.
Endpoints that do not support H.264 High Profile will connect according to the minimum
bitrate thresholds defined by the following System Flags:
• H264_BASE_PROFILE_MIN_RATE_SD30_SHARPNESS
• H264_BASE_PROFILE_MIN_RATE_HD720P30_SHARPNESS
• H264_BASE_PROFILE_MIN_RATE_HD1080P30_SHARPNESS
• H264_BASE_PROFILE_MIN_RATE_CIF60_MOTION
• H264_BASE_PROFILE_MIN_RATE_SD60_MOTION
• H264_BASE_PROFILE_MIN_RATE_HD720P60_MOTION
These System Flags must be added to the System Configuration file before they can be
modified. For more information see the "Modifying System Flags” on page 22-1.
Example: If the High Profile Optimized option is selected in the Resolution Configuration dialog
box and the System Flag values are set as in the following table:
The flags listed below are used in version 7.0.1 only. From Version 7.0.2 these flags were replaced
with the High Profile sliders in the Resolution Configuration dialog box. For more information, see
"Controlling Resource Allocations for Lync Clients Using RTV Video Protocol” on page 3-27.
System Flag Default Value
H264_BASE_PROFILE_MIN_RATE_SD30_SHARPNESS 256
H264_BASE_PROFILE_MIN_RATE_HD720P30_SHARPNESS 1024
H264_BASE_PROFILE_MIN_RATE_HD1080P30_SHARPNESS 1536
H264_BASE_PROFILE_MIN_RATE_CIF60_MOTION 256
H264_BASE_PROFILE_MIN_RATE_SD60_MOTION 1024
H264_BASE_PROFILE_MIN_RATE_HD720P60_MOTION 1536