A very weird thing happened for the first time to me, time dilation on an iChat video conference. This has also been reported in this locked discussion at Apple: http://discussions.apple.com/thread.jspa?messageID=8003907: doing an iChatAV video chat, the remote person gets time delayed video, while the audio comes through correctly. Looking at Connection Doctor, the remote host reports its outgoing frame rate to be 15, while it is coming in to me at 9 (while my camera's frame rate is the same on my machine as the remote machine). So, this results in me watching the remote camera in 2/3 time slow motion, and the time lag increases the longer the conference runs. It's as though the remote machine was going by me at 70% the speed of light.
Configuration: two 1.33 GHz iBooks, the remote one in Canada, mine in the US, the remote one on Tiger, mine on the latest Leopard.
As a test, I repeated the conferences with different configurations: connected via AirPort vs. connected via ethernet. Both through an Airport Express. No difference.
On the local iBook vs. a MacBook Pro 2.4GHz. No problem on the MacBook Pro, which works normally. So it must be some issue with the iBook.
There was no other great CPU load on the iBook.
I just wonder how this phenomenon is even possible. Where is all the time delayed video being buffered? I measured a delay of 7:40 in the video, which at 300 Kb/sec gives 17MB of buffered video. Is the Internet buffering it, or AIM's servers, or Airport Extreme, or local RAM?
Configuration: two 1.33 GHz iBooks, the remote one in Canada, mine in the US, the remote one on Tiger, mine on the latest Leopard.
As a test, I repeated the conferences with different configurations: connected via AirPort vs. connected via ethernet. Both through an Airport Express. No difference.
On the local iBook vs. a MacBook Pro 2.4GHz. No problem on the MacBook Pro, which works normally. So it must be some issue with the iBook.
There was no other great CPU load on the iBook.
I just wonder how this phenomenon is even possible. Where is all the time delayed video being buffered? I measured a delay of 7:40 in the video, which at 300 Kb/sec gives 17MB of buffered video. Is the Internet buffering it, or AIM's servers, or Airport Extreme, or local RAM?