DV export degradation

Just did a very quick test in iMovie.
Selected a short clip of imported HD footage from a PAL Sony HC3.
The camera captures with rectangular pixels at 1440x1080 which get imported as 1920x1080 into iMovie 08 stored as AIC files (iMovie 06 did the same).
Tried to export the clip to DV.
Selected Share>Export using Quicktime and Movie to DVStream.
Initial output was botched as it saved as a 640x480 NTSC stream, with 4:3 aspect ratio when played back via QT.
Second attempt selected the Options and PAL/16:9 settings, and this time it output a PAL DV stream which displays as a 1024x576 movie with 16:9 aspect ratio in QT.
How on earth do you get it to output full resolution back to a DV stream? Presumably you can't. Did iMovie 06 allow this with HD material (I never saved anything back to the camcorder with that version).
Resolution aside, the quality of the 2 exports is extremely poor - the small preview of the clip playing back in iMovie is scaled to a size much smaller than 1920x1080 but looks great. The 2 exported files are extremely soft with lack of detail by comparison.
Looks to me as though you cannot use iMovie as a repository for HD material if you want to easily export to similar quality output.
Strange.
AC

There is a discussion about this here (thread 1088568):
http://discussions.apple.com/thread.jspa?threadID=1088568&start=0&tstart=0
The short of it seems to be you can't. DV material in iMovie8 degrades.

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can I capture my footage at say DVCPRO 50 PAL or something at a higher rate over standard firewire connection? To improve quality?<<</div>
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when I export using Quicktime or Quicktime conversion my final output is extremely bad quality<<</div>
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Adam Sebire wrote:
I'd like to believe FCP is actually sophisticated enough to deliver broadcast-quality results on its own, 6 versions down the track!
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DV export degradation

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