Skip to main content
This forum is closed to new posts and responses. New discussions are now taking place in the IBM Developer Answers forum.
Information Mgmt
New to Lotus
How to buy
Live demos
Technical library
Forums & community
Java™ technology
Open source
SOA and Web services
Web development
My developerWorks
About dW
Submit content

developerWorks  >  Lotus  >  Forums & community  >  IBM Sametime Forum

IBM Sametime Forum



PreviousPrevious NextNext

Ninke Westra 13.Nov.07 07:13 AM Lotus Notes
Audio/visual services 7.5.1 CF1 Windows

A customer has asked me if there is a way to improve the peformance of audio & video in meetings, since it showed delays up to a second which is not acceptable to them (and I agree).
A video chat between two clients works ok, but if you enable audio/video in an online meeting there's a delay in video of somewhere between 0.5 and 1 second .

Sofar I've not been able to find any tuning parameters that might help here.

The server shows virtually no load (testing with just two users), the network traffic doesn't get past 200KB/s (on a 1gb network), with the high quality codecs and 512kbps bitrate for video selected.

the delays are still there when choosing the lowest quality codecs and bitrates, so it is not a network issue. (ping response <1ms on all clients used in the test.).

Are there some additional settings to tweak in this respect outside the jitter buffer and number of frames per packet?

The sametime server is a dual Xeon 3GHz with 4GB RAM running Domino 7.0.2 FP2 with Sametime 7.5.1 CF1 installed.
Sametime is configured for tunnelling, for users that need access over port 80, but during testing clients in the LAN were used, and the Java console output (debug level 2) shows that UDP connections were used for audio & video.

CPU & Network load on the server very low.

Ideas anyone?
Or should I tell the customer that Sametime just isn't up to the task when it comes to online meetings.

Unacceptable delay in the video str... (Ninke Westra 13.Nov.07)
. . RE: Unacceptable delay in the video... (Victor Toal 19.Nov.07)
. . . . UDP is available, it works fine in ... (Ninke Westra 4.Dec.07)
. . . . . . The sametime client 2 client chat i... (Carl Tyler 4.Dec.07)
. . . . . . . . I know ;-) (Ninke Westra 5.Dec.07)

  Document options
Print this pagePrint this page

 Search this forum

  Forum views and search
Date (threaded)
Date (flat)
With excerpt
Advanced search

 RSS feedsRSS
All forum posts RSS
All main topics RSS
More Lotus RSS feeds


Forum use and etiquette
Native Notes Access
Web site Feedback

Lotus Support

 Lotus Support
IBM Support Portal - Lotus software
Lotus Support documents
Lotus support by product
Lotus support downloads
Lotus support RSS feeds


IBM Composite Applications
IBM Mashup Center
IBM Connections
IBM Connections Cloud Developers
IBM Docs
IBM Forms
IBM Mobile Connect
IBM Sametime
IBM SmartCloud for Social Business
IBM Web Experience Factory
Lotus Domino
Lotus Domino Designer
Lotus Expeditor
Lotus Foundations
Lotus iNotes
Lotus Instructor Community Courseware
Lotus Notes
Lotus Notes & Domino Application Development
Lotus Notes Traveler
Lotus Protector
Lotus Quickr
Lotus Symphony
IBM Web Content Manager
WebSphere Portal

Lotus Forums

 Lotus Forums
Notes/Domino 9.0
Notes/Domino 8.5 + Traveler
Notes/Domino XPages development forum
Notes/Domino 8
Notes/Domino 6 and 7
IBM Connections
IBM Mobile Connect
IBM Sametime
IBM SmartCloud Notes
Lotus Enterprise Integration
Lotus Protector
Lotus Quickr
Lotus SmartSuite