2k workflow

Gordon Prince said:
As I already posted:

It seems quite strange that someone like Stuart English is speaking about 2.35 when the correct ratio is 2.39 if it is right.
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If you scan a 35mm film that is shot 2.40 scope, you get 2048x1556, a full aperture scan.

Since scope is a 2 to 1 squeeze, Y= 1556/2 which is 778. Then you take off 220 off the left side of the image in X to take out soundtrack area.

You then get 1828x778 which is a 2.35 image. Since a 2.40 image would be 1828x762, you have 8 pixels top and bottom to play with.

You NEED to look at a sizing chart which lists different aspect ratios, a good chart will show you the action and title safe areas.

All your critical image should be within action safe, and all titling should fall within title safe.

Most major feature films shoot a sizing-focus chart that is digitally scanned and given to all involved in the post production, so they know what they have to protect for.

You really don't want to shoot 2.39 or 2.40 because that is the projection aspect ratio shown in a theater, which is tighter than what the camera aspect ratio would be.

Also you won't have any room for repositioning in case you need it.

Zooming into an image should be a last resort, even though you can zoom in as much as 40% before you notice image degradation.

An HD 1920x1080 image is a 1.77 aspect, and a 1.85 aspect of that same image would be 1920x1038, so that gives you 21 pixels top and bottom to fuss with.


I should charge for this stuff
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I can't let this one pass. The DCI specs for 2K digital cinema are 2048 x 858 for 2.39:1 and 1998 x 1080 for 1.85:1. RED's 2K format allows for both.
 
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Greg Lowry said:
I can't let this one pass. The DCI specs for 2K digital cinema are 2048 x 858 for 2.39:1 and 1998 x 1080 for 1.85:1. RED's 2K format allows for both.
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It's more a question about why say 2.35 when you mean 2.39 than the DCI spec.

DCI isn't widespread yet, though this may be fine for those who wish to only release in DCI compliant theaters.
 
2.35 v's 2.39

2.35 v's 2.39

We can handle either. Its all captured by the sensor in 16:9 (1.78) aspect anyway, then cropped in the camera or in the edit bay to create your 1.85, 2.35 or 2.39 images - whatever you need to fit your delivery standard(s).

I personally prefer a workflow that carries the 16:9 image through to post and to crop there, but in camera crop is also technically possible - just make sure you select the right crop, as an operator error there isn't recoverable.
 
Stuart English said:
We can handle either. Its all captured by the sensor in 16:9 (1.78) aspect anyway, then cropped in the camera or in the edit bay to create your 1.85, 2.35 or 2.39 images - whatever you need to fit your delivery standard(s).

I personally prefer a workflow that carries the 16:9 image through to post and to crop there, but in camera crop is also technically possible - just make sure you select the right crop, as an operator error there isn't recoverable.
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Shooting aspect ratio marks already in camera? #LCD now? And the latter EVF when there will be the case?#

Then, if it can be in camera can we save storage space? Is that so?

About the errors, if a feature is shot in 2.39, it will be the same standard til the last frame, so it wouldn't be a big deal.
 
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Stuart English wrote: I personally prefer a workflow that carries the 16:9 image through to post and to crop there, but in camera crop is also technically possible...

I almost missed the significance of the above remark.

That widescreen formats can be cropped IN CAMERA is something NEW, isn't it? I've not read that before. I think Mr. English has told us something important. And Mr. Jannard has just indicated on dvinfo.net that we won't have to be concerned about the lack of a 1080p 4:4:4 spec after IBC. Something big is brewing on the formats front. User selectable formats, perhaps? Yikes!
 
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You're completely right, Greg. Gordon get it this relevant good new from Stuart English. :thumbsup:

I'm glad to see people here to get the best info resource to all dvxuser.com readers.
 
Greg Lowry said:
That widescreen formats can be cropped IN CAMERA is something NEW, isn't it?
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It's new for a digital camcorder, but it's been mentioned as a part of Red for awhile now. Just one of those "pushing the envelope" ideas! :)
 
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