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Old November 7th, 2013, 10:50 AM   #1
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5d3 slow motion - 720 upscaled to 1080 or 1080 downscaled to 720?

Hi

I'm looking to do some slow motion work in an upcoming video. I'm just wondering if its recommended to upscale the 720 slow motion footage to 1080 or just to downscale the remaining 1080 to 720?

Thanks!
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Old November 7th, 2013, 11:38 AM   #2
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Re: 5d3 slow motion - 720 upscaled to 1080 or 1080 downscaled to 720?

Ben to get nice smooth slow motion you need to film 720p or 50p so keep it at 720 then slow down in post below 50% and all good.
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Old November 8th, 2013, 08:53 PM   #3
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Re: 5d3 slow motion - 720 upscaled to 1080 or 1080 downscaled to 720?

I understand that, but the non-slow motion footage will be shot at 24fps/1080. Should I downscale my 1080 footage or upscale the 720 footage?
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Old November 8th, 2013, 10:24 PM   #4
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Re: 5d3 slow motion - 720 upscaled to 1080 or 1080 downscaled to 720?

That would depend on your intended delivery size, tools available to you, and what screen it will play back on. AE has a very good recently patched in upscaler that works well from my recent tests. I personally downscale all 1080-> 720p when there is a lot of 'rapid' slow motion since the image falls apart rather quickly on upscale. If the shot is rather docile and you arent slowing some heavy motion footage down you might be able to get away with upscaling and sharpening depending.

Can't really answer that for you.
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Old November 10th, 2013, 02:32 AM   #5
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Re: 5d3 slow motion - 720 upscaled to 1080 or 1080 downscaled to 720?

Quote:
Originally Posted by Ben Davies View Post
I understand that, but the non-slow motion footage will be shot at 24fps/1080. Should I downscale my 1080 footage or upscale the 720 footage?
No always downscale upscale you will always lose.
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Old November 15th, 2013, 12:57 PM   #6
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Re: 5d3 slow motion - 720 upscaled to 1080 or 1080 downscaled to 720?

It depends.

What is the end target, a 720 display or a 1080 display?

If it's a 1080 display, do you expect that its built-in upscaler is better than your software upscaler or worse?

FWIW, the 720p TV market evaporated a number of years ago. There were one or two years where 720p or 1080p was a shopping decision. Manufacturers moved quickly to 1080p and the decision became moot.
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Old December 3rd, 2013, 09:31 PM   #7
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Re: 5d3 slow motion - 720 upscaled to 1080 or 1080 downscaled to 720?

If you shot with your sharpness turned all the way down, then upscaling 720 shots onto a 1080 timeline isn't that bad, there won't be as many pixellated artifacts as if you left your sharpness at the default setting. If you're mixing it with 1080 footage you'll notice that the 720 slowmo shots are definitely visibly softer but most people won't see it, other videographers and filmmakers might pick up on it but only if they're nit picking and looking for faults.
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Old December 8th, 2013, 12:30 PM   #8
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Re: 5d3 slow motion - 720 upscaled to 1080 or 1080 downscaled to 720?

My own workflow: Since almost everything I produce is intended for web viewing, I edit on a 720p timeline. In Premiere Pro, I simply drop all the footage (both 720p and 1080p) onto the 720p sequence. The 720p stuff fits perfectly, but as an added bonus, I have significant wiggle room to re-frame the 1080p footage as I desire without losing quality. I can do after the fact zooms, pans, crops, jump cuts, etc.

Thereís also a debate about how much resolution Canon DSLRs are actually pushing in 1080p mode. It certainly isnít 1080 lines of resolution. So I usually settle on 720p and call it a day. Itís more beneficial to reframe shots than it is to target a higher resolution that I donít need, I canít see, and that really isnít there anyway.
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