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Upscaling a 2.5k image on the BMCC

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Alexander Nilsen
Upscaling a 2.5k image on the BMCC
on Jul 17, 2013 at 12:12:18 am

Hi guys,

If I were to upscale the 2.5K image of the BMCC RAW to be eqiuvalent to 1080p would it be correct to say I would scale it 44%? I took 1080 divided into 2432 = 0,444 ~ 44%

For example if I want to do a steadycam shot and stabilize it with motion tracking in Motion 5

Blackmagic Cinema Camera 2.5K EF
Canon XA10
Merlin Steadicam
Tilta 3 DSLR rig
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Tom Sefton
Re: Upscaling a 2.5k image on the BMCC
on Jul 17, 2013 at 9:19:11 am

How do you mean upscale 2.5k to be the equivalent to 1080p?

If you grade your footage at 2.5k in resolve and render a 2.5k ProRes file, you could import the file into a 1080p project....


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Chris Tompkins
Re: Upscaling a 2.5k image on the BMCC
on Jul 18, 2013 at 11:07:14 am

Upscale?
2.5k is already larger then 1080.

Chris


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Alexander Nilsen
Re: Upscaling a 2.5k image on the BMCC
on Jul 18, 2013 at 12:42:09 pm

I mean to enlarge the image so it would be 1080 from 2.5K. Let say I would scale up/zoom in/enlarge the image on a 1080 resolution, at some point it would be equivalent to 720 and my question is how many percentages of zooming in would I need to apply to get 1080 from 2.5K?

Blackmagic Cinema Camera 2.5K EF
Canon XA10
Merlin Steadicam
Tilta 3 DSLR rig
iMac intel i5


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Chris Tompkins
Re: Upscaling a 2.5k image on the BMCC
on Jul 18, 2013 at 3:28:49 pm

see chart here:







Chris


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Tom Sefton
Re: Upscaling a 2.5k image on the BMCC
on Jul 18, 2013 at 10:47:05 pm

2.5k = roughly 2500 horizontal pixels
1080 = 1920 horizontal pixels

if you need to stabilise your footage due to camera shake, grade your footage in resolve and export a full 2.5k resolution ProRes422HQ file.

Import this to AE or Motion and make a 1080p project. Bring the footage into the smaller project and you will notice the difference in size. Adjusting for camera shake shouldn't be a problem.


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Alexander Nilsen
Re: Upscaling a 2.5k image on the BMCC
on Jul 18, 2013 at 11:57:55 pm

Ah ok but don't I need to enlarge the image in motion to make it look like an 1080 image after stabilizing the shot?

Blackmagic Cinema Camera 2.5K EF
Canon XA10
Merlin Steadicam
Tilta 3 DSLR rig
iMac intel i5


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Chris Tompkins
Re: Upscaling a 2.5k image on the BMCC
on Jul 19, 2013 at 10:36:25 am

The Warp Stabilizer in AE is great also.

Chris


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Matthew Sonnenfeld
Re: Upscaling a 2.5k image on the BMCC
on Jul 19, 2013 at 4:49:24 pm

There will be no enlarging at all. 2.5K is larger than 1080p. You downscale 2.5K to be 1080p. By placing 2.5k in a 1080p timeline/project the software will automatically scales the footage correctly, or you can resize it to fit, but that would be making it smaller, not larger by any circumstance.

To stabilize the footage and have the best 1080p results, do your color grade in DaVinci resolve, then export full 2.5K ProRes files and bring those into a After Effects 1080p project. Use the Warp Stabilizer on the footage and AE will use the extra resolution to best stabilize the footage by pan/scan outside the 1080 frame.

You could also use the built in stabilizer in Resolve though the Warp Stabilizer is very easy to use if unfamiliar with the DaVinci's toolset.

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