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Editing 4k Project Output to 1080

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Ben Gustafson
Editing 4k Project Output to 1080
on Mar 28, 2017 at 9:52:18 pm

Hi all - I'm editing a film shot on the 5d Mark IV in 4k. I started off with a 4k timeline res of 4096x2160. I'd like to "future proof" this project and be able to export a 4k finished product down the road.

For now, since I'm exporting 1080, I'd like to do a few push ins on some shots. Someone suggested creating a new 1080p timeline, and copying everything in there. Then I scale to fit.

However - can I just keep my 4k timeline, punch in 10-20% and then export it as a 1080? I don't understand the difference.

Thank you!


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Dave LaRonde
Re: Editing 4k Project Output to 1080
on Mar 28, 2017 at 10:22:51 pm

There isn't any difference.

AME does a good job of downscaling, plus it's a lot easier to let AME do it than than to create an entirely new timeline.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Shane Ross
Re: Editing 4k Project Output to 1080
on Mar 29, 2017 at 9:28:11 am

The difference is that if you push in 10% on your 4K footage...you are making that footage larger...you are ZOOMING IN on it. Image quality degrades when you enlarge the image beyond 100%.

Now...if that 4K footage was in a 1080p sequence...that 4K footage...isn't scaled fully. It isn't 100% size. You've scaled it to fit, so it might be like 250% size, for example. So if you need to enlarge it...you'll still be less than 100%. You might get to 55%...60%. Quality is still good...no degredation. It's not larger than 100%.

Better to have 4K in a 1080 sequence and push in than enlarge the 4K image by 10% then downcovert.

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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Jeff Pulera
Re: Editing 4k Project Output to 1080
on Mar 29, 2017 at 4:44:50 pm

I agree with Shawn - I edit 4K stage event footage in 1080p and 720p sequences so that I can fake a multi-cam shoot, cutting to "close ups", panning across stage, etc.

If you copy/paste the contents of the 4K timeline to a 1080p timeline, you will want to apply Set to Frame to the clips to scale them (available via right-click) - do not use Scale to Frame, otherwise when you punch in you immediately lose quality since Scale to Frame does what it says - the 4K footage gets scaled down to 1080 right away. Set to Frame preserves the 4K quality to use all the extra pixels when scaling with Motion effect.

One thing to consider - you said your footage is 4096x2160, which might be called 4K Cinema. This is not 16:9, so if you export as 1080p, or drop the clips into a 1080p sequence, there will be some black around the edges, so you will have to scale to fit the frame and part of the image would then be cropped off.

The more common 4K UHD is 3840x2160 and is 16:9 so I don't run into that issue at all.

Thanks

Jeff Pulera
Safe Harbor Computers


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Jeff Pulera
Re: Editing 4k Project Output to 1080
on Mar 29, 2017 at 4:46:16 pm

I meant Shane, sorry!

Jeff


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Ben Gustafson
Re: Editing 4k Project Output to 1080
on Mar 29, 2017 at 11:13:09 pm

Thanks Jeff and Shane. The reason for the odd aspect ratio is because it was shot on the 5D Mark IV. I really like the aspect ratio but I noticed it's not 16:9.


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andy patterson
Re: Editing 4k Project Output to 1080
on Mar 31, 2017 at 10:25:24 am

[Ben Gustafson] "Thanks Jeff and Shane. The reason for the odd aspect ratio is because it was shot on the 5D Mark IV. I really like the aspect ratio but I noticed it's not 16:9."

Is someone forcing you to have a 16:9 aspect ratio? If you really like the aspect ratio you can just allow Premiere Pro to ad black (letter box effect) to the the clips. There are TV shows and Blu-ray movies that make use of the letter box effect.


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Ben Gustafson
Re: Editing 4k Project Output to 1080
on Mar 31, 2017 at 7:23:40 pm

The final project must be 16:9 for this film fest. So I'm planning to add black bars.


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Bob Smith
Re: Editing 4k Project Output to 1080
on Apr 18, 2017 at 2:31:00 pm

Hello and thanks for the contributions.
Yes you already started editing and you need to scale up by the 10% how do you do that with a bunch of edits, is there a batch mode? Hope I'm being clear!
Bob


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Bob Smith
Re: Editing 4k Project Output to 1080
on Apr 18, 2017 at 5:44:59 pm

Ok we figured out that we can copy the Motion block in the effect controls to paste directly to timeline, I'm sure there's more naivety to come along.


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