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Defining AVC-Based Conference Profiles • • The Collaboration Server supports the VUI addition to the H.264 protocol for endpoints that transmit wide video (16:9) in standard 4SIF resolution. When there is a change of speaker in a Continuous Presence conference, the transition is set by default to fade in the current speaker while fading out the previous speaker. To make this transition visually pleasant, fading in the current speaker while fading out the previous speaker is done over a period of 500 milliseconds. The Fade In / Fade Out feature can be disabled by adding a new flag to the System Configuration. The Value of the new flag must be: FADE_IN_FADE_OUT=NO. For more information about System Flags, see Modifying System Flags 12 Optional. To select the Video Layout for the conference, deselect the Auto Layout, and click the required number of windows from the layouts bar and then select the windows array. The selected layout is displayed in the Video Layout pane. Video Layout Options Number of Video Windows Available Video Layouts 1 2 3 4 5+ 9 10+ Overlay For more information see Overlay Layouts. Polycom®, Inc. 51
