Encrypted or unencrypted ?

Anything and everything to do with DCP-o-matic.
Cantar4
Posts: 86
Joined: Wed Jul 20, 2016 4:52 pm

Encrypted or unencrypted ?

Post by Cantar4 »

Hi Carl, unless modifying the film title by keying a Crypt/Open suffix prone to mistaken entries,
I can't differentiate the (un)encrypted status of two DCP packages made for the same film
(and there is no hint about their encryption status in the j2c.mxf file either).

Example: Sarah5fps film DCPised with/without encryption:

Sarah5fps_Crypt_SHR-1_F-178_10_2K_20160913_SMPTE_OV
j2c_9d6303d2-7758-4aa0-9e2d-d1c83574270f

Sarah5fps_Open_SHR-1_F-178_10_2K_20160913_SMPTE_OV
j2c_85dc2c67-d072-4255-b5b5-3cd61116504e

Would it be possible to get a dcp-o-matically inserted crypt tag somewhere ;) ?
cloud06
Posts: 52
Joined: Mon Feb 22, 2016 3:02 pm

Re: Encrypted or unencrypted ?

Post by cloud06 »

This wouldn't be compliant with naming convention:
http://isdcf.com/dcnc/

I suggest you manually rename folder after DCP creation.
Cantar4
Posts: 86
Joined: Wed Jul 20, 2016 4:52 pm

Re: Encrypted or unencrypted ?

Post by Cantar4 »

Manually renaming the package ? such an after the fact operation is precisely what I would avoid ;
and the DCP itself (within the renamed package) would then not be stamped by its (un)crypted status.
Cantar4
Posts: 86
Joined: Wed Jul 20, 2016 4:52 pm

Re: Encrypted or unencrypted ?

Post by Cantar4 »

[quote="cloud06"]This wouldn't be compliant with naming convention: http://isdcf.com/dcnc//quote]

You probably overlooked the huge insert printed in red :
" The Digital Cinema Naming Convention is a voluntary industry recommendation,
designed to provide HUMAN READABLE information.
This should not be depended upon for AUTOMATION.
Systems SHALL NOT reject content based on real or perceived errors
in the use of the Naming Convention."

Nothing can prevent me to write CRYPTAA or OPENAA as my AA-STUD name in the allocated "studio" field
of the CPL string : not a big deal to automatically insert it when I choose to encrypt the DCP.
As said by an authority on these matters: " I think you can (ab)use 'studio' any way you like.
There is a list but I very much doubt any cinema servers are checking for "approved" studio codes."

I am pretty sure the list of studios (annex5 of the 2013 convention) is already obsolete...
Don't forget this string is made for the peace of mind of the theater projectionists,
not for server police, why not to eliminate possible mistakes in the jobs of DCP and DKDM makers?
scorpio81
Posts: 116
Joined: Mon May 09, 2016 7:19 am

Re: Encrypted or unencrypted ?

Post by scorpio81 »

I would suggest adding "enc" string to mxf file name for encrypted DCPs and "unenc" or none for unencrypted. Most commercial DCPs use that sort of naming.
carl
Site Admin
Posts: 2548
Joined: Thu Nov 14, 2013 2:53 pm

Re: Encrypted or unencrypted ?

Post by carl »

As said by an authority on these matters: " I think you can (ab)use 'studio' any way you like.
There is a list but I very much doubt any cinema servers are checking for "approved" studio codes."
I'm not really an authority on what crazy things projector manufacturers might do ;)
cloud06
Posts: 52
Joined: Mon Feb 22, 2016 3:02 pm

Re: Encrypted or unencrypted ?

Post by cloud06 »

Cantar4 wrote:
cloud06 wrote:This wouldn't be compliant with naming convention: http://isdcf.com/dcnc//quote]

You probably overlooked the huge insert printed in red :
" The Digital Cinema Naming Convention is a voluntary industry recommendation,
designed to provide HUMAN READABLE information.
I did not overlook that. But it is a standard and DOM has good practice of complying with it.

Adding something to MXF filename is not a bad idea. Or renaming folder name manually - that does not affect CPL name (annotationtext) and is human readable.