Can we do a video from iChat to a Google Talk plug-in user

Question

If a person I know is into using the Google Talk plug-in, which uses say [email protected] and I use iChat, can I Add Buddy entering [email protected] and invite that person to video chat?
There may be 2 parts to this:
1) From Leopard
2) From Snow Leopard
What I have seen so far:
A friend on Leopard cannot enter [email protected] and see my name in his Buddy List. Leopard wants .mac, .me or AIM in a popup.
In my own SL, I have entered an@gmail name in and see it appear with an AIM guy icon, but have not been able to try the chat.
Then, if iChat to GTalk can be done, can a 3-way chat be done this way?
I'm still trying to find someone to test with me but meanwhile maybe someone else has experience with it.
Thanks.
~Deb

Answer 1

What? I don't think that is correct (about the Codec). Both ichat AV and google talk video use H.264 and MPEG4 audio for their codecs.
"http://code.google.com/apis/talk/call_signaling.html"
"Currently, only Gmail voice and video chat supports sending and receiving video. At this time, the H.264/SVC and H.264/AVC codecs are supported. Other codecs may be supported in future versions."
And ichat A/V
http://en.wikipedia.org/wiki/IChat
Additionally, video conferencing uses H.264/AVC
And finally...Google Talk Video most certainly does NOT use Flash
http://news.cnet.com/google-launches-video-chat-for-gmail/
"Unlike many current video chat products, Gmail Video and Voice uses a proprietary plug-in, not Flash. The small (2MB) download supports Firefox, IE, and Chrome on the PC, and Firefox on the Mac. Support for other browsers and platforms (Linux and mobile) may come later."
All that being said you are correct though about compatibility. Even though Apple and Google Talk videoconferencing use the same codecs for video and audio they cannot communicate with each other.