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black line on SD Uncompressed QT

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Phil Hawes
black line on SD Uncompressed QT
on Jan 26, 2011 at 9:47:23 pm

I notice a black line on the very bottom edge of the frame on some SD uncompressed QT files from archival sources.

The files are made from Betacam or pre-Betacam sources and some from 16mm. The black line is 2 or 3 pixels high so would disappear on the old cathode ray tube but now that I am up-converting these files to HD 108060i through a Kona card, the lines become more apparent. This will require me to scale or crop slightly after the fact.

Any ideas where that line comes from? I guess that in some cases the original material was 640 x 480 not 720 by 486 but what about the film transfers? Is this a common problem?

Phil


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