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720p 23.98 from 59.94 D5 tape?

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cmlundy
720p 23.98 from 59.94 D5 tape?
on Nov 19, 2006 at 11:20:40 pm

I had a client with a D5 tape at 720p 59.94. The tape was generated in our facility's telecine and has "pulldown" or duplicate frames, so it's similar to a DVCPro HD tape that has 24 frames inside of 60. (i.e. frame 1,then a duplicate, frame 3, then two duplicates etc.) The client wanted 23.98 Quicktimes captured from this D5.

Question is, can I capture with the Kona 3 and remove the duplicate frames so I can end up with 23.98 clips? I'm not sure it would work because ordinarily this workflow is for DVCPro HD that has flagged frames that can be read by the Kona via the RP-188 User bits stream. Does the D5 have the same type of thing? Can the Kona remove these frames? Any thoughts or help would be appreciated.

-Chris Lundy
PostWorks New York



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David Battistella
Re: 720p 23.98 from 59.94 D5 tape?
on Nov 20, 2006 at 3:51:51 am



I am pretty sure these frames are carried on the HD-SDI stream as well so the KONA can do the removal on the fly.

David



Peace and Love :)


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cmlundy
Re: 720p 23.98 from 59.94 D5 tape?
on Nov 20, 2006 at 3:46:47 pm

That's really the question. I know the duplicate frames are there but does D5 as a format actually carry flagged frame info. It's not DVCPro HD so maybe it doesn't have that ability. If anyone has a definitive answer I'd love to know.


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Mike Most
Re: 720p 23.98 from 59.94 D5 tape?
on Nov 20, 2006 at 4:11:27 pm

No, there are no frame flags. These are only generated when footage is shot on a Panasonic video camera, in which the camera front end is actually running at 23.98. The only recording format for DVCProHD is 60p (aka, 59.94p). Since the D5 doesn't know anything about 720/23.98 (neither does any other video equipment - it doesn't exist as a video format, only as a data format), and since the input signal from the telecine is 720p/60 (if it was recorded in this format at all - it might have been converted from 1080/23.98p), it has no awareness of any particular cadence.

The only way I know of to remove this pulldown is to either convert to 1080i/60 and use Cinema Tools, or possibly to use After Effects -although I'm not sure that AE understands frame based 3:2 pulldown either.


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