Alan, The ISP could be employing some type of packet shaping that is queuing your various data streams. At least, i've had this happen at my university in the past and it manifested itself with my outgoing video and audio streams arriving at various times (generally intact, but sometimes slowed down or sped up as things caught up after being queued). My first stream had priority, but the rest did not.
You can see the ports associated with the audio and video when you pull down the properties command under... i think it's under the file menu on the venue client. That may help if you can then look at the traffic associated with that port/ip. I'm also assuming you were bridging (unicast) as well. In general, the audio and video seem to be in sync simply due to network speeds and bandwidth on I2/etc. I believe. Also, your uplink bandwidth on your DSL is probably much lower than your downlink bandwidth causing some congestion on your outgoing. Were you exceeding your available bandwidth? Which way were you seeing the delays? Changing the location "room" wouldn't change anything except the ports you're sending/receiving on so I'd actually be surprised if it changed then. If you changed venue servers (went to NCSA instead) and saw a difference (like it went away) then that would be interesting to note. If i use my ADSL connection I have to VPN to my campus first out of my ADSL in order to get the ports i need in/out and through the nat'ing etc. And then a session could easily blow away my available (even my 6Mb downlink) bandwidth on the incoming not to mention there is no QoS if i'm not VPN'd. Just some thoughts from what little i know... John Q. -- John I. Quebedeaux, Jr.; Louisiana State University Computer Manager LBRN; 131 Life Sciences Bldg. e-mail: [email protected]<mailto:[email protected]>; web: http://lbrn.lsu.edu phone: 225-578-0062 / fax: 225-578-2597 On Sep 29, 2006, at 7:11 PM, Alan Sondheim wrote: I've been working on a PIG in Brooklyn, New York, through DSL, connected through Argonne to an AG at West Virginia University, Morgantown. We're using 2.4. My question - the sound delays approximately 7.5 seconds (the video is about .5 which is understandable). What could cause such a large delay? I don't think it's congestion; we tried the Lobby as well as the Test Room; the results were the same. One reason I'm curious - I work at times in sound and it would help to understand the mechanism here. Thanks, Alan, [email protected]<mailto:[email protected]> blog at http://nikuko.blogspot.com - for URLs, DVDs, CDs, books/etc. see http://www.asondheim.org/advert.txt - contact [email protected]<mailto:[email protected]>, - general directory of work: http://www.asondheim.org Trace at: http://tracearchive.ntu.ac.uk - search "Alan Sondheim" http://clc.as.wvu.edu:8080/clc/Members/sondheim
