A few things to check. First, close iMovie and launch iChat with the camera set to “record” mode to see if iChat recognizes it as a camera. If you’ve got an iSight camera on your iMac, it will likely default to that first. Click on the green camera icon to change to the firewire port. Once you click on that, you should be able to see the video that’s coming in from the camera in the preview window. If it sees the camera, you at least know it recognizes the fact that it is indeed a camera. Note: the Mac only lets one application at a time utilize the firewire connection, so you’ve got to close all programs that could potentially be using it before launching iChat. My wife’s iMac sometimes had trouble “letting go,” and I would have to restart the computer to clear the associations.
If iChat recognizes the camera, close iChat and launch iMovie, switching the camera from “record” mode to “play” mode. If it says “no camera attached,” then it may be an iMovie thing. If it notices there’s something attached, but doesn’t let you control it, it’s probably going to be a camera issue. Given the age of the camera (9 - 10 years) it may not allow remote playback. I don’t know how old the control protocol is. If you can play manually and have iMovie see what’s coming in, and iMovie lets you import that way, then you’re set. You may want to check with JVC to see if there’s a firmware update for the camera that might help.
If iChat does not recognize the camera, then something’s screwy with either the camera, the firewire cable, or the firewire port. The fact that the system profiler says “unknown device” leads me to believe it’s probably a camera firmware issue, but that’s just a guess. My system profiler shows mine as a Panasonic whatever the model is. My first troubleshooting would be to borrow a friend’s or neighbor’s miniDV camera to see if it recognizes that. If it does, then it’s definitely a camera thing. If not, it’s probably internal to the Mac (or a similarly ancient camera). Also, if you’ve got a firewire hard drive or such, you can plug that in to see if the computer recognizes what it is.
One other option I’d consider is an A/V interface box. This lets you bring in video from non-firewire sources such as Hi8, DVD, VHS, etc. The one I saw the other day had a firewire input as well. I don’t know if it’s a USB or firewire interface between the box and the computer; I’d imagine it’s a firewire because you need that kind of speed to import video. I don’t think you have remote control going through that box, but you can hit “play” on the camera and then “import” on iMovie.
Search Apple’s support forums, too. They’ve got one dedicated to iMovie issues. I’ve generally been able to find answers to most of my questions on those forums after digging a bit.
Later,
K