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From: | Florian Kainz |
Subject: | Re: [Openexr-devel] KeyKodes (a recap) |
Date: | Thu, 30 Sep 2004 16:03:14 -0700 |
User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030314 |
Tom Dilligan wrote:
Things I'm not clear on: In the KeyCode structure: The perfOffset is in perforations or in frames? I think that it should be in perfs, I've observed that cineon files store the perfOffset in frames, and dpx files store perfOffset in perfs. If the cineon convention is chosen an additional field will need to be used to denote the perf offset to the actually align the images.
According to the Kodak document posted by Thomas Kumlehn (http://www.kodak.com/US/plugins/acrobat/en/motion/postProduction/keykode/35mm.pdf), the offset appears tobe in perforations. The document explains that EASTMAN KEYKODE Numbers include "the 10-digit key number, manufacturer identification code, film type and offset in perforations." Florian
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