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Post #584245

Author
negative1
Parent topic
Making our own 35mm preservation--my crazy proposal
Link to post in topic
https://originaltrilogy.com/post/id/584245/action/topic#584245
Date created
5-Jul-2012, 5:02 PM

 

1990osu said:

negative1 said:

we are saving the 4k scans, for future proofing the video when the time

comes. that is what we are using as our source, not 1080p or 2k.

 

we've done some quick tests with 4k video and

resampling it down to 1080p, and did not notice an

improvement over just using the 2k/1080p downsamples.

Now I'm completely confused.

 

much like the problem with kb, KB, Mbyte , and megabytes.

resolutions are confusing.

 

approach 1

-----------------

the camera is 8mega PIXEL.. we capture the frames at 3500x2200

or something like that.... we then downscale the images down

to 1080p, which is 1920x1080 and then render it to video

 

True 4k is actually 8.8 megapixels

depending on how you define it:

-------------------------------------------

http://en.wikipedia.org/wiki/4K_resolution

digital cinema standards

standard          resolution        DAR    pixels

-------------------------------------------------------

digital cinema 4k - 4096x1714 - 2.39:1  7,020,544

digital cinema 4k - 3996x2160 - 1.85:1  8,631,360

academy 4k - 3656x2664 - 1.37:1 9,738,584

full aperature 4k - 4096x3112 - 1.32:1 12,746,752

====================================

QFHD is quad full HD, which doubles the 1080p,

which is closer to what we are using.

 

QFHD (3840x2160)

Quad Full High Definition (QFHD), at 3840 x 2160 (8.3 megapixels), doubles the 1080pHDTV standard (1920 x 1080 or 2.1 megapixels) in both the vertical and horizontal dimensions.

 

approach 2

========================================

or we can render video at this resolution, but we can't see

it at this native resolution, so we take this QFHD video,

and downscale it to 1080p and compare... there wasn't much

of a difference..

 

here's more on digital cinema specs:

==========================

http://en.wikipedia.org/wiki/Digital_cinema

 

later

-1