Fixed + X = 1080p heaven

[David Mullen ASC]

There may be some truth to that, it would explain where some of these numbers come from. I will look further into it. I always was told that K = 1000 and therefore 2K was just a simplified (rounded-off, generalized) label for what is often specifically 2048 pixels. But then, your theory would explain where 2048 comes from.

 

[Jeff Kilgroe]

The 2048 / 4096, etc.. numbers come that way because most image processing algorithms as well as video codecs are written to prefer certain numbers. Typically numbers that are evenly divisible by 8 or 16. This number affinity does indeed have to do with binary quantities and byte representations within computing environments. This is one reason why RED One "4.5K" is 4480 pixels wide.

"K" just represents a quantity of 'kilo" or 1000. And in DI frame size speak, it's not technically a binary representation as it would be for kilobytes, megabytes, etc... Mysterium-X "5K" should be 5120 pixels wide, but we're not going to run around calling it "5.1K" are we?

 

[D Fuller]

The 2048 / 4096, etc.. numbers come that way because most image processing algorithms as well as video codecs are written to prefer certain numbers. Typically numbers that are evenly divisible by 8 or 16. This number affinity does indeed have to do with binary quantities and byte representations within computing environments. This is one reason why RED One "4.5K" is 4480 pixels wide.

"K" just represents a quantity of 'kilo" or 1000. And in DI frame size speak, it's not technically a binary representation as it would be for kilobytes, megabytes, etc... Mysterium-X "5K" should be 5120 pixels wide, but we're not going to run around calling it "5.1K" are we?

LOL! Those of us who are really geeky might.

As the numbers get bigger, the fine points of "accuracy" matter less and the idea the numbers carry matters more. Even Apple just changed the way the OS measures data from 1K=1012 to 1K=1000. As David M has rightly pointed out, the difference between 4K and 2K is significant. The difference between 1980 and 2048 ... not so much.

 

[Petr Dvorak]

I see. I was under the impression (from the more common resolutions of 4096 and 2048 pixels being 4K and 2K respectively) that the system used 'K' as a binary prefix, similar to kilobytes (where 1KB = 1024 bytes, so a 2048 byte file is 2KB and a 1920 byte file would 1.875KB for example). I guess it doesn't really matter since the resolutions are so arbitrary though...

Actually 2K or 4K should be written as 2Ki and 4Ki which is correct binary prefix but nobody use it.

More about IEC standard prefixes

http://etherealmind.com/decimal-binary-prefixes-using-kibi-mibi-kilo-mega/

:hat:

 

[perfectday]

So....

So....

Sorry for this noobie question which has probably been answered somewhere on this form, but is the resolution difference between 1080 and 3k not significant?

What about burning to Blu-Ray from Final Cut? Would you see a big or noticeable difference between 1080 footage vs 3k footage burned to a Blu-Ray DVD?

Thanks in advance! I'm really anxious to purchase the Scarlet but just wanted to see if the 5D Mark II would be just as good.

 

[Chuck Z]

You might get an answer if you give us your real name.

 

[David Mullen ASC]

Sorry for this noobie question which has probably been answered somewhere on this form, but is the resolution difference between 1080 and 3k not significant?

What about burning to Blu-Ray from Final Cut? Would you see a big or noticeable difference between 1080 footage vs 3k footage burned to a Blu-Ray DVD?

Thanks in advance! I'm really anxious to purchase the Scarlet but just wanted to see if the 5D Mark II would be just as good.

Just go back to Page 1 of this thread for the answer about 3K RAW versus 1080P RGB.

And the 1080P output of the 5D does not really measure-out to 1080P in terms of resolution. Using the Scarlet and doing a 3K RAW to 1080P RGB conversion should be much better.

 

[perfectday]

Well...

Well...

Would that be best done in camera or during post?

I would figure that the 3k resolution, even authored to blu-ray 1080p would blow all other 1080p footage out of the water.

 

[David Mullen ASC]

Would that be best done in camera or during post?

I would figure that the 3k resolution, even authored to blu-ray 1080p would blow all other 1080p footage out of the water.

Compared to what? A Sony F35 or Genesis? Why would 3K RAW Bayer to 1080P shown on a Blu-ray blow a $200,000 pro 1080P camera "out of the water"? Aren't you putting a wee bit too much emphasis of a few more pixels? 3K RAW is about 5.3MP total (2.65MP for green, 1.3MP for blue, 1.3MP for red). The F35/Genesis records 2.2MP each for green, red, and blue (and in fact, the sensor itself is 12MP).

The 3K Scarlet should make excellent 1080P footage, but let's not get carried away.

The number "3K" does spell the whole picture, you have issues regarding the OLPF strength, debayering, you have compression, you have whatever post path you take, the lenses you put on the camera, etc.