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Keycode Numbering in DPX Metadata


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#1 Emyr R E Pugh

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Posted 29 October 2011 - 10:09 AM

I'm having trouble understanding the logic of Keycode numbering in DPX metadata for 35mm material scanned on a Northlight II. The material was telecined on a Spirit 2K.

On the telecined material, the Keycodes follow the form: XXXX+00 to XXXX+15, so 16 frames per foot.

However, in the DPX metadata the Keycodes follow the form: XXXX+03 to XXXX+63, in increments of four (XXXX+03, XXXX+07, XXXX+11...XXXX+63).

It's not difficult to convert between the two, but I wonder if anyone could tell me the reason for this difference?
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#2 Phil Rhodes

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Posted 29 October 2011 - 11:03 AM

Sounds like it's encoding perfs not frames. This makes a certain amount of sense given that DI made it a lot easier to use 2- and 3-perf formats.

P
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#3 Emyr R E Pugh

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Posted 29 October 2011 - 04:45 PM

That must be what it is; the scanned material is 4-perf. Thanks for the help!
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