Known Issues and Limitations for Video (WBS30)

Document created by Cisco Localization Team on Feb 3, 2017Last modified by Cisco Localization Team on Aug 8, 2017
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This section contains known issues and limitations that affect WebEx integrated video. For more information about the browsers, operating systems, supported by WebEx, and known issues that affect other WebEx services, see Cross-platform Features and Known Issues.

High-definition video

High-definition video is automatically turned off during application, desktop, and streaming media sharing. It is automatically turned on again when those functions end.

Streaming media in Event Center stops presenter's video

In Event Center, playing video from a file and sharing it with all participants requires stopping the presenter's video camera. The presenter can send only one video stream at a time. The presenter's video camera can be turned back on again once he or she has finished streaming the file or media.

This limitation has been added to protect subscribers from bandwidth issues that could result from a spike in video traffic if multiple non-thumbnail video streams are sent to a large group of participants. The limitation is expected to be removed in the future.

Collaboration Meeting Rooms (CMR) common issues

The following issues are common for both CMR Cloud meetings and CMR Hybrid (WebEx-enabled TelePresence) meetings:

Sending video from WebEx applications to video conferencing systems or applications

A CMR Cloud or CMR Hybrid meeting always starts at the best video resolution between TelePresence (or other video conferencing systems or applications) and WebEx. If high-definition video is available, it is available to all participants. If any participant on the WebEx side experiences poor network conditions, the resolution between TelePresence and WebEx will downgrade to accommodate that participant. As a result, video resolution will be poor for all other participants. The minimum bit rate a WebEx application must process from the WebEx Cloud to be able to receive both video and application or screen sharing (formerly called "desktop sharing") content is 1.2 Mbps. Less than that will result in the WebEx application showing only the shared application or screen.

Starting with WBS29.11, if, for reasons of low network bandwidth or conditions (such as CPU or RAM use) that are local to the WebEx application, the WebEx application is not able to maintain the 1.2 Mbps bit rate per the above, users will see a "low-bandwidth" warning message instead of receiving TelePresence video. In WBS29.11 and later, WebEx application users will automatically periodically retest their connection to the WebEx Cloud to assess whether any network or local conditions have been remedied. If they are able to send and receive video at a bit rate of 1.2 Mbps or greater, they will be able to resume sending and receiving video.

For information about recommended bandwidth configuration settings for CMR Cloud meetings, see Prerequisites in Cisco WebEx Meeting Center with Collaboration Meeting Rooms Enterprise Deployment Guide on the Cisco WebEx Meeting Center Configuration Guides page.

For information about recommended bandwidth configuration settings for CMR Hybrid meetings, see Prerequisites in the Cisco WebEx Features and Important Notes chapter and Tips for Troubleshooting Low Bandwidth with the WebEx Meeting Center Client on Windows or Mac in the Troubleshooting chapter of the Cisco Collaboration Meeting Rooms (CMR) Hybrid Configuration Guide on the Cisco TelePresence Management Suite (TMS) Configuration Guides page. For additional information, refer to the Cisco WebEx Network Bandwidth White Paper.

In-meeting video experience

WebEx users can only see the active speaker or the most recently active speaker's video endpoint in the WebEx application. Video endpoint users who are not talking will not show up in the WebEx application.

Video endpoint users can only see the active speaker or the most recently active speaker from WebEx on their screens. WebEx users who are not talking will not show up on their screens.

If there is background noise in a TelePresence room, it can cause the video for that TelePresence room to appear as the active speaker in the WebEx meeting. If needed, the host can use the Lock Video command to lock the video display on another participant's video.

In a CMR Cloud or CMR Hybrid meeting, the participant videos of participants who have joined from Apple iPads or iPhones over 4G LTE will not be visible on TelePresence systems, although audio will still be available. This problem occurs because 180 p video is required to send video to TelePresence systems, but sending 180 p video over mobile networks is not supported due to the Apple iTunes store requirements for applications.

Full-screen video view

When the presenter switches to full-screen video view while sharing his or her screen, application, or document, sharing is paused on the participant side (the last-shared screen freezes). When the presenter exits full-screen video view, sharing automatically resumes.

Participants stay in full-screen video view when the presenter stops sharing and automatically exit full-screen video view when the presenter starts sharing again.

If the Mac or PC WebEx application has two monitors, users can view full-screen view on one monitor and full-screen or application sharing on the other monitor by dragging the video window to the other monitor and selecting the "View all participants in full-screen view" icon.

Presenter may unintentionally disable video for all participants

If a WebEx user who is the presenter in the meeting unchecks the Video option in the Meeting Options dialog box, video is disabled for all meeting participants, whether they joined from a WebEx meeting application or from a video conferencing system. To restore video for all participants, the meeting host or current presenter should check the Video option in the Meeting Options dialog box.