OK. I haven’t done any HDV, so jump at me if you like! -;)
I cannot really see why you choose to take one very compressed format (HDV into another very but differently compressed format (DV, and then try to capture as uncompressed. This is 3 times re-encoding your media before an edit.
First: You cannot capture uncompressed 8 bit over firewire (if that’s what you are trying), even when you set your capture presets as such. If you don’t have a capturecard, you’ll have to do the conversion in FCP after capturing.
You’ll probably need a RAID to do anything usefull with uncompressed on a G4.
I just cannot understand why you don’t just capture as HDV?
OK. You’ll find plenty of people around here telling you: HDV – Don’t do it!
But as you’ve already recorded in that format, stay there.
If you have the hardware to handle it, it is maybe an idea to transcode to some more robust format for editing, especially if you plan to do lots of effects and tinkering with the image. DVCPRO HD comes to mind.
Do not downconvert to an SD image before you’re finished.
eh…
But I’ve maybe just misunderstood your whole post…
Cheers!
Gunleik