Video Does Not Work
Problem Video does not work, but audio does.
Recommended Action Try pressing the hold button and then the resume button on the phone. This can sometimes clear up transient problems related to video.
Possible Cause The meeting scheduler cannot host video meetings, so video is not enabled for the meeting.
Recommended Action Check the Can host audio/video meetings setting in the user profile of the meeting scheduler.
Possible Cause In Cisco Unified Communications Manager, the DTMF Signaling Method for the SIP trunk to Cisco Unified MeetingPlace is configured to use RFC 2833.
Recommended Action Set the DTMF Signaling Method field to No Preference.
Problem Video does not work.
Possible Cause Check if video is enabled on the system.
Recommended Action Select System Configuration > Media Resource Configuration. Make sure that Video enabled is set to Yes.
Problem During a video conference, the call drops after 20 seconds, and there is no video or audio during that time. The SIP B2BUA log from Infocap shows that Cisco Unified Communications Manager sent TIAS with a negative value: [.INFO] [..MESSAGE] b=TIAS:-1000, and this is because the Video Call Bandwidth field was set to NONE in Region setting.
Solution Set the correct value for the Video Call Bandwidth field in the Region setting in Cisco Unified Communications Manager.
Problem The video type (of the conference) the endpoint is trying to join does not match the video profile of the endpoint.
Possible Cause If the conference is a high-definition (HD) conference and the endpoint can only support CIF, the CIF endpoint will not receive video. The video type of the conference must be the video type of the participant scheduling the conference.
Recommended Action Check for the mismatch between the scheduler and participant video profile settings.
Problem The active speaker endpoint video is not showing up.
Possible Cause This might be the result of the video not being sent by the active speaker endpoints.
Recommended Action Ask participants at other video endpoints in the conference to speak so they become the active speaker and their video is seen by others in the conference.
Problem During switching, video sometimes freezes.
Possible Cause If you are using an Electronic Media Server (EMS) system and video freezes, it might be because there is a delay in the I-frame being received. When there is a new active speaker, this is normal.
Recommended Action Check the video statistics for the active speaker channel and look for the I-frame Req Sent and I-frame Response Received.
Poor Video Quality
Problem The video has a pixelated image or poor quality.
Possible Cause Network issues are causing packet loss between the endpoint and Cisco Unified MeetingPlace.
Recommended Action Check the network for and correct any packet loss or excessive bandwidth utilization along the path between the video endpoint and Cisco Unified MeetingPlace.
Possible Cause ( CSCso95109) The input stream is from the Cisco Unified IP Phone 7985. This potentially affects video calls with Cisco Unified MeetingPlace when the Cisco Unified MeetingPlace is in hardware media mode and the video format is set to “standard rate” (384kb).
Workaround : In the Administration Center, set the Video Preferences to High rate on the Add User Profile Page. Verify that the Type of media server is set to Hardware Media Server.
Recommended Action For full compatibility with Cisco Unified MeetingPlace, upgrade the Cisco Unified IP Phone 7985 to application load 4.1(7) or later.
Recommended Action (EMS systems only) Set a higher DSCP value for video streams. Select System Configuration > Call Configuration > Media Parameters. Set a new value for Video media IPv4.