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Re: Unable to Import QC Composition into iMovie or iDVD

On 09/01/2007, at 6:03 AM, email@hidden wrote:

Another Quirk has been in exporting a composition to quicktime and
then to DV - the results are consistently ugly. Looking at the
properties of the resultant movie shows the size to be something
like: "720 x 480 - actually: 640 x 480" - going in and explicitly
changing the size in the export dialog to 720 x 480, or even HD give
the same result -the exported movies are all 640x480 and loaded with
jaggies. Exporting as DivX works fine - crisp output at 720x480 no
jaggies. so I'm not really suspect of the whole shebang, but both the
DV Stream Export, and QuickTime export as DV turn out the same.

Be careful of aspect ratio issues doing this. 720x480 is the number of pixels in NTSC DV, but they're not square; 640x480 or 720x540 are square-pixels at 4:3 and are likely to produce better results if resized to NTSC later.

However, your problem might be the DV codec itself. The chroma information in DV is halved, so if you've got high-contrast chroma transitions, you'll see jaggies no matter what you do. Bright red against black is guaranteed to fail. Your DivX export won't produce the same jaggies, but when you bring it into iMovie, it's going to become DV again (if you're in a DV project) and the jaggies return.

Cheers,
Iain.

http://funwithstuff.com - http://twelvefives.com - http://byscooter.com


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