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reframing ARRI Alexa 444 HQ footage
I am cutting a feature shot with the Alexa – the files are 444 Prores HQ. I am wanting to do a little reframing and wondering how much I can zoom into the footage ie what percentage will still be acceptable. They are planning on doing a theatrical release.
I have been spoiled by RED 4K giving you the ability to zoom in and reframe at 200%!
This is cross-posted in the ARRI forum.
Thanks,
Kim -
4 Replies
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I would be loathed to even push in to 110 on HD footage for theatrical release. But this is really a matter of opinion rather than fact.
Andrew McKee
Editor/Colourist
Avid Certified Instructor – MC5.5
Apple Certified Trainer – FCP7
Pixelwizard.net -
Depends a little on the shot. I’ve seen people enlarge 2K 35mm scans by as much as 33%. That’s from 2048. Alexa is 1920.
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Since the ProRes footage is 1920×1080, any blow-up degrades the image. However, as Job said you can get away with various amounts depending on the shot. Also not all devices/software blow-up equally well. For example, I’ve cut Alexa footage on FCP and blow-ups that can be done in FCP are significantly worse than the exact same percentage done by the colorist in Baselight, using the exact same ProRes files. In Media Composer or Symphony, I think you can safely go up to 120% (maybe more) on most shots. It will look softer, but not necessarily worse. Make sure you render with the HQ toggle enabled.
Oliver
Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com -
PS: You say 444 ProRes HQ. The files are either ProRes HQ or ProRes 4444. If the latter, you should also be working in an Avid RGB project and set your rendering to 1:1 MXF RGB to preserve the most quality. If HQ, then standard 10-bit project settings are fine.
– Oliver
Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com
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