Polycom 1500/1800/2000/4000 manual System Flags for Cropping Control, Range Default

Appendix H - Deployment Into Microsoft Environments

As in previous versions, SLAAC (Stateless Address Auto Configuration) continues to be supported.

System behavior can be controlled by adding the IPV6_AUTO_ADDRESS_CONFIGURATION_METHOD System Flag and setting its value as required.

AUTO—(default) Use DHCPv6 first in case of failure use SLAAC. SLAAC—Use SLAAC only.

For more information see, Modifying System Flags.

System Flags for Cropping Control

Cropping occurs when the video source (endpoint) aspect ratio is different from the video cell aspect ratio in the Polycom Video Layout.

For all endpoints other than ITP endpoints and panoramic cells the Collaboration Server calculates the mismatch percentage between the source video aspect ratio and Polycom video layout cell aspect ratio. The mismatch percentage is used to determine whether cropping or striping will be applied to the video cell in the Polycom video layout.

For non-panoramic layouts, cropping and striping can be controlled by adding the

CROPPING_PERCENTAGE_THRESHOLD_GENERAL System Flag and setting its value accordingly.

For panoramic layouts, cropping and striping can be controlled by adding the

CROPPING_PERCENTAGE_THRESHOLD_PANORAMIC System Flag and setting its value accordingly. For both System Flags:

Range: -1-100.

Default: -1

If the calculation result is less than or equal to the value of the

CROPPING_PERCENTAGE_THRESHOLD_GENERAL System Flag, cropping will be applied.

If the calculation result is greater than the value of the

CROPPING_PERCENTAGE_THRESHOLD_GENERAL System Flag, striping will be applied.

If the CROPPING_PERCENTAGE_THRESHOLD_GENERAL System Flag value is set to 0, cropping will not be applied.

If the CROPPING_PERCENTAGE_THRESHOLD_GENERAL System Flag value is set to -1 cropping will always be applied.

If the CROPPING_PERCENTAGE_THRESHOLD_GENERAL System Flag value is set to 100, always apply cropping with the exception of mobile aspect ratios. Mobile aspect ratios are those with a larger vertical aspect than horizontal for example 3:4.

Example: A mobile Lync client sends 288x352 (3:4) aspect ratio. Cropping this resolution to 16:9 would require the cropping of 190 pixels on the vertical aspect. The mismatch calculation would yield 190/352 ~54. If the applicable System Flag's value is set to >= 54, striping, rather than cropping, is applied.

For more information see, Modifying System Flags.

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