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Last Updated: Jan 09, 2023

Balancing primary and presentation video bandwidth

Allocate bandwidth to the presentation video input stream as a percentage of the total available bit rate for the video streams in Preferences > Video > Presentation Video Bandwidth. The default value is 20%.

NOTE: Adjust this preference before placing a call. Adjusting this preference during a call has no effect.

The percentage applies to the presentation video input stream, typically a laptop connected to the codec. The system allocates the bandwidth based on the selected option only when the system sends video images during a presentation. Consider allotting a larger percentage to the presentation video input stream when the presentation video input includes motion. Examples include a slide show that includes several animations or video input from a DVD player.

When you use the default call bandwidth (1152 kb/s) and the default presentation video bandwidth (20%), the transmitted resolution of the presentation defaults to 1920 x 1080p5.

To increase the frame rate of the presentation stream, increase the bandwidth of the call and the presentation. For example, if you set Presentation Video Bandwidth to 50% in a 2500 kb/s call, the presentation supports 1080p30. If recording is enabled during the presentation, the resolution defaults to 1920 x 1080p15.