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FCP 7 & Aspect Ratio (where do the #s come from and how to calculate?)

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Bryce Hoover
FCP 7 & Aspect Ratio (where do the #s come from and how to calculate?)
on Jan 31, 2014 at 5:18:50 pm

A lot of the work I've been doing lately has been taking SD footage and scaling it up to fit the 1920x1080 raster. Dropping an SD 4x3 clip (720x486) into an HD 1920x1080 timeline makes the SD clip 226 scaled and 12.5 distort/aspect ratio. Where does that number (12.5) come from and how can I "do the math" or know what distortion value to use when there's anamorphic SD footage I need to "up rez"?

I've seen -33.33 and -12.5 (and probably others I can't remember). Sometimes 12.5 doesn't look right but then 10 doesn't really either. I'm not really comfortable eyeballing everything. I've searched google (and the cow) for answers and haven't found anything. Maybe there's not an answer other than eyeballing everything. It's maddening! Any ideas?


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