IChat fails to Share Video or Share desktop, regardless of network

Recently iChat's Video and Screensharing functionality has given up on me.
According to a lot of threads online it's a network problem, but in 3 verry distinct scenario's iChat would fail.
1. Over the internet (Airport Extreme on my end, tried with different users): Error -7 or Error -8
2. Wireless over same network: Error -7 or Error -8
3. Ad-hoc network: iChat stayed in the "connecting" stage for over 15 minutes
I'm truly baffled by this, as it used to work fine. These are the things I already checked
- Firewall settings on Macbook (turned off)
- Interference with other programs (Adium, Skype, ...), turned them all off
- Service hoging the needed ports (portscan didn't show anything)
- iChat connection doctor (says all is fine)
Other information which might be of help
- I run the webkit nightly builds
- I run the latest betas of Adium and Skype
- I have Parallels installed
If anyone has any ideas, pleas help me out
Thx!
== UPDATE ==
I also cleared the cache (several times), both of iChat and Quicktime
== /UPDATE ==
Message was edited by: Bertg

Hi,
Apple do read the Boards. (they do not however comment).
Various Apple Articles (Formally Apple Docs) are based on stuff from the boards.
Here is an old one from iChat 2 days
Not so old from iChat 3 days
This specific Issue
notice the Update date.
This thread started 3 days after Leopard cam out is likely to be one of the first mentions of the issue.
Level 4 and 5 posters also have a place where they can post notable things to the Hosts if they feel it is more urgent.
From the iChat Menu you can access this page
http://www.apple.com/feedback/ichat.html
You can report what you think are faults (and solutions if you find them) or Wish List stuff.
I hope that helps.
9:43 PM Thursday; January 29, 2009

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    2008-01-03 18:52:43 +0000: (+++++)1: State change from AVChatNoState to AVChatStateWaiting.
    2008-01-03 18:52:43 +0000: 0x18aee740: State change from AVChatNoState to AVChatStateInvited.
    2008-01-03 18:52:48 +0000: 0x18aee740: State change from AVChatStateInvited to AVChatStateConnecting.
    2008-01-03 18:52:48 +0000: (+++++)1: State change from AVChatStateWaiting to AVChatStateConnecting.
    2008-01-03 18:53:01 +0000: 0x18aee740: State change from AVChatStateConnecting to AVChatStateEnded.
    2008-01-03 18:53:01 +0000: 0x18aee740: Error -8 (Did not receive a response from 0x18aee740.)
    2008-01-03 18:53:01 +0000: (+++++)1: State change from AVChatStateConnecting to AVChatStateEnded.
    2008-01-03 18:53:01 +0000: (+++++)1: Error -8 (Did not receive a response from 0x18aee740.)
    Video Conference Error Report:
    7.561392 @SIP/SIP.c:2719 type=4 (900A0015/2)
    [SIPConnectIPPort failed]
    Video Conference Support Report:
    0.341012 @Video Conference/VCInitiateConference.m:1582 type=2 (00000000/0)
    [Connection Data for call id: 1 returns 1
    5.001277 @Video Conference/VCInitiateConference.m:1597 type=2 (00000000/0)
    [Prepare Connection With Remote Data - remote VCConnectionData: 1, local VCConnectionData: 1
    5.015026 @Video Conference/VCInitiateConference.m:1701 type=2 (00000000/0)
    [Initiate Conference To User: u0 with Remote VCConnectionData: 1 with Local Connection Data: 1 conferenceSettings: 1]
    5.560358 @SIP/Transport.c:2353 type=1 (00000000/0)
    [INVITE sip:user@[rip]:16402 SIP/2.0
    Via: SIP/2.0/UDP [lip]:16402;branch=z9hG4bK324adc9245ffbda5
    Max-Forwards: 70
    To: "u0" <sip:user@[rip]:16402>
    From: "0" <sip:user@[lip]:16402>;tag=1028680691
    Call-ID: 1452b6ae-ba2d-11dc-b315-c8edfa8e4012@254-179-33-3
    CSeq: 1 INVITE
    Contact: <sip:user@[lip]:16402>;isfocus
    User-Agent: Viceroy 1.3
    Content-Type: application/sdp
    Content-Length: 781
    v=0
    o=James 0 0 IN IP6 lip
    s=0
    c=IN IP6 lip
    b=AS:2147483647
    t=0 0
    a=hwi:1056:2:2800
    a=iChatEncryption:NO
    a=bandwidthDetection:YES
    m=audio 16402 RTP/AVP 110 121 12 3 0
    a=rtcp:16402
    a=rtpmap:121 speex/16000
    a=rtpmap:122 speex/8000
    a=rtpmap:113 X-AAC_LD/44100
    a=rtpmap:110 X-AAC_LD/22050
    a=rtpmap:3 GSM/8000
    a=rtpmap:0 PCMU/8000
    a=rtpID:2018669853
    m=video 16402 RTP/AVP 123 126 34
    a=rtcp:16402
    a=rtpmap:123 H264/90000
    a=rtpmap:126 X-H264/90000
    a=rtpmap:34 H263/90000
    a=fmtp:34 imagesize 1 rules 30:352:288
    a=framerate:30
    a=RTCP:AUDIO 16402 VIDEO 16402
    a=fmtp:126 imagesize 0 rules 20:640:480:640:480:20
    a=fmtp:123 imagesize 0 rules 20:640:480:640:480:20
    a=rtpID:3535381580
    6.060792 @SIP/Transport.c:2353 type=1 (00000000/0)
    [INVITE sip:user@[rip]:16402 SIP/2.0
    Via: SIP/2.0/UDP [lip]:16402;branch=z9hG4bK324adc9245ffbda5
    Max-Forwards: 70
    To: "u0" <sip:user@[rip]:16402>
    From: "0" <sip:user@[lip]:16402>;tag=1028680691
    Call-ID: 1452b6ae-ba2d-11dc-b315-c8edfa8e4012@254-179-33-3
    CSeq: 1 INVITE
    Contact: <sip:user@[lip]:16402>;isfocus
    User-Agent: Viceroy 1.3
    Content-Type: application/sdp
    Content-Length: 781
    v=0
    o=James 0 0 IN IP6 lip
    s=0
    c=IN IP6 lip
    b=AS:2147483647
    t=0 0
    a=hwi:1056:2:2800
    a=iChatEncryption:NO
    a=bandwidthDetection:YES
    m=audio 16402 RTP/AVP 110 121 12 3 0
    a=rtcp:16402
    a=rtpmap:121 speex/16000
    a=rtpmap:122 speex/8000
    a=rtpmap:113 X-AAC_LD/44100
    a=rtpmap:110 X-AAC_LD/22050
    a=rtpmap:3 GSM/8000
    a=rtpmap:0 PCMU/8000
    a=rtpID:2018669853
    m=video 16402 RTP/AVP 123 126 34
    a=rtcp:16402
    a=rtpmap:123 H264/90000
    a=rtpmap:126 X-H264/90000
    a=rtpmap:34 H263/90000
    a=fmtp:34 imagesize 1 rules 30:352:288
    a=framerate:30
    a=RTCP:AUDIO 16402 VIDEO 16402
    a=fmtp:126 imagesize 0 rules 20:640:480:640:480:20
    a=fmtp:123 imagesize 0 rules 20:640:480:640:480:20
    a=rtpID:3535381580
    7.061182 @SIP/Transport.c:2353 type=1 (00000000/0)
    [INVITE sip:user@[rip]:16402 SIP/2.0
    Via: SIP/2.0/UDP [lip]:16402;branch=z9hG4bK324adc9245ffbda5
    Max-Forwards: 70
    To: "u0" <sip:user@[rip]:16402>
    From: "0" <sip:user@[lip]:16402>;tag=1028680691
    Call-ID: 1452b6ae-ba2d-11dc-b315-c8edfa8e4012@254-179-33-3
    CSeq: 1 INVITE
    Contact: <sip:user@[lip]:16402>;isfocus
    User-Agent: Viceroy 1.3
    Content-Type: application/sdp
    Content-Length: 781
    v=0
    o=James 0 0 IN IP6 lip
    s=0
    c=IN IP6 lip
    b=AS:2147483647
    t=0 0
    a=hwi:1056:2:2800
    a=iChatEncryption:NO
    a=bandwidthDetection:YES
    m=audio 16402 RTP/AVP 110 121 12 3 0
    a=rtcp:16402
    a=rtpmap:121 speex/16000
    a=rtpmap:122 speex/8000
    a=rtpmap:113 X-AAC_LD/44100
    a=rtpmap:110 X-AAC_LD/22050
    a=rtpmap:3 GSM/8000
    a=rtpmap:0 PCMU/8000
    a=rtpID:2018669853
    m=video 16402 RTP/AVP 123 126 34
    a=rtcp:16402
    a=rtpmap:123 H264/90000
    a=rtpmap:126 X-H264/90000
    a=rtpmap:34 H263/90000
    a=fmtp:34 imagesize 1 rules 30:352:288
    a=framerate:30
    a=RTCP:AUDIO 16402 VIDEO 16402
    a=fmtp:126 imagesize 0 rules 20:640:480:640:480:20
    a=fmtp:123 imagesize 0 rules 20:640:480:640:480:20
    a=rtpID:3535381580
    Video Conference User Report:
    0.000000 @:0 type=5 (00000000/16402)
    [Local SIP port]
    0.000018 @:0 type=5 (00000000/16402)
    [Local SIP port]
    7.754039 @Video Conference/VideoConferenceMultiController.m:1476 type=5 (00000000/0)
    [IP And Port Data With Caller IP And Port Data: Obtained 200 bytes of local IP and port data (5 entries). Remote data was 0 bytes (0 entries).
    Binary Images Description for "iChat":
    0x1000 - 0x230fff com.apple.iChat 4.0 (601) /Applications/iChat.app/Contents/MacOS/iChat
    (plus the rest of the stuff)....... this means very little to me.
    I may have left out some vital information, and if so sorry but just ask and I'll fill it in if it can help solve the problem for us.
    If anyone can help with this matter than many thanks in advance.

    Hi Ralph,
    Thanks for the links. I have had a look at the ADSL Nation web site, and yes I did set my modem up as they state, the DNS server was removed.
    Thinking back to when I had just the modem connected straight to the computer without the Airport (as per you suggestion) and iChat worked including the video, it would make me think that the problem lays with the Airport? But by the sounds of your last post the Airport does not have settings to be able to change DoS or SPI or it does not make any difference anyway/ or it Automatic?? Is that what you mean?
    I have noticed on other posts people talking about having a list of ports open for iChat. As on your web site as well. However I think your web site is looking towards iChat3, I think? I'm think that iChat 4 is different when it comes to port opening??. Is this something I have to set up on the Airport and if so how? The list of ports go something like this, that I've seen.....
    5190, 5220, 5222, 5223, 5298 TCP and 5060, 5190, 5297, 5298, 5353, 5678, 16384-16403 UDP
    I just saw this in a new post.( http://discussions.apple.com/thread.jspa?threadID=1331562&tstart=0 )
    Are they ports on the Airport or iMac? I was thinking that by adding the iChat to the list on the Firewall that all the ports that need to be open would be opened by Leopard? Or do I need to do this manually as well on the Airport? Does Bonjour have anything to do with this? Is that something I need to look into.
    Thanks for the on going help with this one, it seems to be a strange one!

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