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Dolby atmos DCP

J

Juan Ropero

Hi All

How do you make your Dolby Atmos DCPs?

I have been researching for a few weeks now cause I need to make one soon and I really struggle with understanding the sound part.

I normally use DCPoMatic or EasyDCP, not sure which one is best for this.

My main doubt at the moment is that I have received the theatrical dolby atmos mxf with beeps and a TC mistake. Is there any way to modify it or does it have to be exported again?

Thanks!
 
Both DCP-o-matic and EasyDCP can make Dolby Atmos DCPs. It is much easer when all assets of the same duration but you can definitely trim Atmos in DCP-o-matic. And it seems TC doesn't matter at all. You need to use SMPTE with 16 channels of audio DCP template.
 
You need to use the latest SMPTE spec, RDD or something like that. You also have to include non ATMOS 5.1 as a fallback. I'm just figuring out how to do it. I made one earlier this year and it was good. Then I had to adjust something, wrapped another one and it failed QC for being out of sync. This us EasyDCP standalone. I can't play the ATMOS DCP audio in Resolve. That makes it difficult.
 
Yes, I suspected that. The problem is that the machine running the DCP software has no video/audio IO. The way all that is wired I can;t get audio from that machine, We normally instead QC DCPs in Resolve so we can project them.
 
I am working on https://dcpinspect.filmhaus.net which includes a QC & evaluation player with substantial IAB/Atmos-related features. For the longest time I have had a proper blind spot wrt Immersive Audio, so I dug in and am currently mindblown about this nifty tech. Holy moly, watching and dissecting e.g. the Dolby Unfold trailer with its ~100 objects and digging into how the audio and positional and zones/snaps data is packaged was the most tech fun I have had this year.

A couple of random remarks and findings related to IAB/Atmos, DaVinci Resolve workflow, tools:

- DaVinci Resolve Studio (not the free version) has an extensive feature set related to IAB/Atmos. Details in the Fairlight Audio Guide to DaVinci Resolve (Lesson 11 Exploring Immersive Audio Integration). You could produce a complete IAB/Atmos mix in Resolve's Fairlight section
- you can import a IAB/Atmos DCP composition in Resolve's Fairlight section and it will set up the required busses for IAB and beds and object tracks
- you can export IMF IAB (one specific IAB/Atmos master format) and ADM BWF (another one). The former yields an MXF which must not be confused with the MXF variant required for DCP/composition authoring
- to convert IMF IAB to a format usable in DCP authoring there are a couple of tools around, with more coming. E.g. https://github.com/izwb003/CineIA_CLI

Oh, none of these are endorsements, of course. Just info about the tools I have access to or ran into while researching.
 
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