4.5k and DCP resolutions

[Paul Lee]

We have a project shot in 4.5k (4480 x 1920, non-anamorphic) on the R1 currently in post. Our exact release specifications are to be determined, but we're doing some research into resolutions for final finishing. We are unlikely to do 4k finish or screening, but it's nice to have it 'in the can' for the future! My current understanding is that the two most common resolutions for 2k dcp's are 'flat' 1998 x 1080 or 'scope' 2048 x 858. The scope resolution is pretty darn close to half resolution r3d, 2240 x 960. If we scale our frame to fit the scope resolution, we do just a little vertical cropping. Does this seem correct? I assume the scope resolution is square pixels and not projected through an anamorphic de-squeeze or anything. Does it make senese to do the finishing at half r3d resolution, or at the scope resolution?

Anyone out there have experience or thoughts regarding dcp resolutions?

Thanks!

 

[Garrett Sergeant]

DCP Conversion

DCP Conversion

Hi Paul,

Flat and Scope refer to common film aspect ratios and refer to their respective anamorphic conversion processes, but in the D-Cinema world, there are no anamorphic conversion processes so everything remains in the square pixel world. There is some debate on how anamorphic processes should be handled. From MKPE:

Can I use an anamorphic lens on my projector?

While anamorphic lenses are the best way to make efficient use of the light available to the projector, not all studios may accept their use. (See the discussion on Single Lens above.)Note that an anamorphic lens in digital cinema does not rely on the distribution of anamorphically squeezed images, as with film. In digital cinema, the projector can electronically perform an anamorphic re-mapping of the image onto its electronic imaging device, requiring an anamorphic lens to correctly display the image. The benefit of this projection technique is that it utilizes the full imaging array, utilizing the maximum lamp power available. Images projected with an anamorphic lens can light up larger screens than in non-anamorphic installations. The anamorphic projection technique has proven useful for large screen 3-D presentations.​

Scope is still your best bet to ensure maximum capability and the solution you detail sounds very reasonable. I just hate to think of all that resolution going to waste.

If you're looking for an affordable route with your DCP, check out our company Simple DCP (www.simpledcp.com) and let's see if we can figure out a solution for finishing your project in 4K.