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New version test help

Posted: Thu Mar 30, 2023 2:34 pm
by carl
Hi all,

To solve some long-running problems with verification failures of SMPTE DCPs (made by DCP-o-matic) with some distributors, the new candidate release 2.16.51 has a fairly significant change to its audio writing. In SMPTE mode it will now write 16 channels of audio in all cases.

It would be great to hear of any successes or failures of DCPs made using 2.16.51.

Thanks!
Carl

Re: New version test help

Posted: Fri Mar 31, 2023 1:23 pm
by jdent02
Is it just for 7.1 tracks or across the board? I just checked a trailer for "65" in 5.1 and it only had a six channel audio MXF

EDIT: the 7.1 track for the Super Mario trailer was a full 16 channels.

Re: New version test help

Posted: Fri Mar 31, 2023 1:29 pm
by carl
This was in SMPTE mode?

Re: New version test help

Posted: Fri Mar 31, 2023 1:30 pm
by jdent02
carl wrote: Fri Mar 31, 2023 1:29 pm This was in SMPTE mode?
Yes, both trailers were SMPTE

Mario also had a DBOX track, "65" did not.

Re: New version test help

Posted: Fri Mar 31, 2023 1:31 pm
by carl
Just to be clear, these are trailers you made with DCP-o-matic?

Re: New version test help

Posted: Fri Mar 31, 2023 1:32 pm
by jdent02
No, these are official trailers from Deluxe.

Re: New version test help

Posted: Fri Mar 31, 2023 1:34 pm
by jdent02
jdent02 wrote: Fri Mar 31, 2023 1:32 pm No, these are official trailers from Deluxe.
Sorry, I should clarify that I was asking if the lack of all 16 channels was really the reason for QC failures, given that Deluxe's own process only creates a 6 channel file for 5.1.

Re: New version test help

Posted: Fri Mar 31, 2023 1:37 pm
by carl
Ah right. My question was more about whether new DCPs made with DCP-o-matic work.

It is possible indeed to make SMPTE DCPs with fewer channels. But to do that, as far as I can see, you need to choose whether or not to include all the new SMPTE metadata (audio subdescriptors and so on). If you omit that, it seems fine to have 6 channel MXFs.

At the moment I'm inclined to say that having an option for this in DCP-o-matic is confusing, so it now always writes the full metadata and 16-channel MXFs.

Re: New version test help

Posted: Fri Mar 31, 2023 7:44 pm
by jdent02
Gotcha. Thanks for the clarification

Re: New version test help

Posted: Sat Apr 01, 2023 10:52 am
by StephW999
Hi Carl,
If DOM produce a audio mxf with 16 tracks, then the "cpl-meta:MainSoundConfiguration" field must have 16 symbols. Unused or silent tracks should have the hyphen symbol
Exemple : 51/L,R,C,LFE,Ls,Rs,-,-,-,-,-,-,-,-,-,- (for 5.1)
71/L,R,C,LFE,Lss,Rss,-,-,-,-,Lrs,Rrs,-,-,-,- (for 7.1 DS)
But version test 2.16.51 produce this string : 51/L,R,C,LFE,Ls,Rs.
Today Most 5.1 movies are made with 8 tracks and 7.1 with 16 tracks.( Including Deluxe)