DCP Aspect ratio trouble with 2.4:1

[neato_orpheus]

I shot my film on a Blackmagic mini ursa 4.6K at 2.4:1 aspect ratio. The picture resolution is 4608x1920.

The first time I ran the DCP I did it in FULL FRAME and that left uneven black bars when we put it in the projector to test.
The tech said they have lenses for SCOPE and FLAT.
So I am doing a DCP in SCOPE right now but when I did it said I would need to crop or else it would be piller boxed.

I have no idea how to crop it. What dimensions do I put it so it will play like it does in the regular playback?

Sorry if this sounds needy I just have the premier on thursday and I gotta figure this out

[carl]

Your image is very close to the Scope ratio, and will need scaling anyway, so I would just select "scale to" scope and "DCP container" scope and that should be fine. You could make a 4K DCP if you wanted.

[neato_orpheus]

I didn't see a "scale to scope" option in the program.
Should I stop the unscaled one I am doing now and start over?

[neato_orpheus]

I didnt see a scale to scope option in the program.

Would you advise that I stop the unscaled scope DCP I am running and do the scale to scope? Where would I find it?

[carl]

It might already be set up right as DCP-o-matic does have a guess.

In the video tab.

[Carsten]

'4608x1920'

Is that active pixel - do you want all the 1920pixel height to be visible?

4608/1920 would translate into a 4k/2.40:1 frame of 4096/1716 - perfect (well...) DCI scope.

Bildschirmfoto 2019-07-21 um 23.23.31.png

Bildschirmfoto 2019-07-21 um 23.23.50.png

@Carl - can you explain why DCP-o-matic does not create 2048/853 or 4096/1706 with slim letterbox bars? Will make no real difference, and in general, I would probably prefer the proper container being filled anyway and ignore the very slight vertical stretch, but, out of curiosity - is there a 'snap' or rounding feature that causes this?

[Carsten]

Oh - and @neato - it is probable that you chose 'simple' interface during installation without understanding what it means - so you can not see the ScaleToScope option. No problem, in this case DCP-o-matic will choose the right scaling automatically from your source file dimensions (which is scope). However, it will not choose the best container automatically (it probably should, at least in simple mode...).

Goto preferences and choose full interface complexity - then you will see the full set of options. But again, this is not necessary to create a proper 4k scope DCP from your content - just set container type to DCI scope and 4k under the DCP tab as shown above, and it will create the right DCP even in simple interface mode.
Your installation may also still use the conservative 100MBit/s datarate default though - you can adjust this up to 230-240MBit/s for a 4k feature - again, only after you have switched to full interface complexity.

Bildschirmfoto 2019-07-21 um 23.18.18.png

[neato_orpheus]

This makes sense! I was wondering why i wasn't seeing more options.

But yes I am encoding one now with 4k scope. I just how the bit thing you are talking about wont have too much of an effect.

Fingers crossed. I don't think Ill have time for another one