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It seems Parallels desktop is one of the culprits in ichat’s video woes; it messes up with its NAT networking somehow. After turning off parallels desktop, my friends and I were able to video chat. The terrible quality can now be blamed on comcast, though setting the quicktime streaming to 500k in System Preferences > Quicktime > Advanced seems to help. My friends and I have still not been able to get screen sharing to work using any combination of settings.

Original Post
This one’s a biggie.
My friend and I used to video chat every day. She ran Tiger and so did I. When I upgraded to Leopard we could still chat, and I could use the neat photobooth effects. But then she upgraded to Leopard, and now we can’t video or ichat anymore. We keep getting the same error: “There was a communication error during your chat.” It says that my friend did not respond.
I get the same error when trying to video chat with another friend running Leopard. We’re both running the newest hardware and the newest software and ‘the most sophisticated OS on the planet’. This was one of the most touted features of Leopard, but instead of improving existing functionality it totally breaks it.
I’ve read that it has to do with Apple’s custom NAT/SIP address translations. I’ve tried opening up recommended ports on my router, disabling my firewall, and playing with quicktime streaming settings to no avail. Tiger iChat worked before I did any of this, and so I don’t think that’s the problem.
I bitch about it here, and encourage you to too:
Apple Discussions: Communication Error – audio and/or video
I’m getting really sick of those smug “I’m a mac I’m a PC” ads. They’re not fair, and as you can see by the recent posts on this blog, Leopard has its own share of very large problems!

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