camera in use by another application
The solution posted for an earlier model of this range of high definition camcorders was posted by http://discussions.apple.com/profile.jspa?userID=861384 and it is: change the rec mode from HD 1080i to DV. For use in iMovie 6 when using it in live camera mode, it is necessary to change back again. Much appreciation to the contributor from Athens.
Just a couple of observations since the latest update of Quicktime has been blamed for many things.
In trying to resolve some non related problems linked to posting a podcast with pics on the web, I was recommended to trash some QuickTime caches in the Library. The problem was it also got rid of a Quicktime component which I needed to get iMovie recognise my new camera. The computer fortunately told me I was missing the component and instructed me to re-install iLife 06. I did and the camcorder worked in iMovie. So I guess I am saying be careful not to trash irreversibly.
Secondly, I was getting a lot of problems initially in live camera mode in iMovie 6. Sometimes it worked and sometimes it did not. It took a Diskwarrior rebuild to sort the problem out. So heavy duty maintenance is sometimes the answer too.
Sorry to stray away from iChat but, when you are using a camcorder in to applications like myself, thought the info might be of interest.
iMac G5, Mac OS X (10.4.9), 2GB RAM 400GB Hard Disc
