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The best common practice to deliver a Digital Cinema Package (DCP)

The best common practice is to deliver the DCP on a Linux ext-2 USB 2 compatible hard drive. The Cru Dataport DX-115 hard drive caddy with a USB 2/3 adapter is often used. These hard drive caddies load directly into a lot of digital cinema equipment. Like Dolby/Doremi and the newer Sony media block.
Updates:
-Some film festivals only accept Cru-DX115 hard drives.
-You are now allowed to have many DCPs and Assetmaps on the same hard drive according to the ISDCF Disc File Format guide and updated SMPTE standards.
-Some film festivals accept digital links to the DCP like filemail and Aspera and many cinemas are connected to digital DCP transfer networks like Movie Transit. I wrote a post about it here.

Standard physical DCP deliverables are made from these parts:

-The Cru Dataport DX-115 harddrive carrier/caddy:
Amazon link
eBay link

-The Cru Dataport Move Dock DX115 USB 2/3 with USB cable and universal power supply (US plug)
Amazon link
eBay link

-Western Digital Caviar Blue 500 GB 3.5 Inch Hard Drive or similar :
Amazon link

To transport these safely, you could use a Pelican 1400 Case:
Amazon link

Together these could look something like this:

New SSD DX115 version


Use a more robust Solid State Drive (SSD) and a smaller Pelican 1200 case (Use SSDs >240 GB)

-The Cru Dataport DX-115 harddrive carrier/caddy:
Amazon link
eBay link

-The Cru Dataport Move Dock DX115 USB 2/3 with a USB cable and universal power supply (US plug)
Amazon link
eBay link

-SanDisk SSD PLUS 480 GB Internal SSD
Amazon link

-Smaller Pelican 1200 case
Amazon link

Together these could look something like this:

Pelican 1200 cables
Pelican 1200 dx115
Pelican 1200 case

USB 2/3 HARD DRIVE

You could use a smaller USB C/2/3 hard drive in an even smaller case:

-Lacie rugged hard drive
Amazon link 

-Pelican 1120 case
Amazon link

Together these could look like this:

Note: Y cable:
You can deliver DCPs on USB 2 hard drives, but the DX-115/move dock adapter also works with equipment that does not supply the standard power on the USB 2 port. You can supply a Y cable with the LaCie rugged hard drive to support powerless USB 2 ports. (Cinemas with non-standard USB2 connections most likely have their own adapters)

Cable Matters Micro USB 3.0 to USB Splitter Cable (Y-cable)
Amazon link

The physical medium specification for DCPs

The physical medium specification for DCPs is a USB 2/3 external hard drive formatted as MBR Ext 2/3. (2 TB limit)
Doremi and Sony (and others) support MBR NTFS, but the recommended format is the Linux format Ext 2 or Ext 3 with an inode size of 128 that is read and executable only.
Source: ISDCF Disc File Format

To format Ext 2/3 hard drives, I have used:
-a PC running Ubuntu Linux
-Ubuntu Linux run from a USB Pendrive made with USB Linux creator.
-Ubuntu running in VirtualBox on a mac. Read more here.
-120 USD Raspberry Pi 400 kit pc Amazon link eBay link

You can copy the DCP to an inode 128 read and executable only EXT2/EXT3 hard drive in many ways.

Formatting the hard drive



In terminal. Install gparted.

sudo apt-get install gparted

Run gparted

sudo gparted

In Gparted

Click on “Device” – “Create a partition table”
Choose msdos.

Use add partition and format the drive as ext2 or ext3.

Note the name of the partition (like sdb1) and format it again in terminal with -I 128 inode.


Ext3

sudo mkfs.ext3 -I 128 -L DCP123 /dev/sdb1

ext2

sudo mkfs.ext2 -I 128 -L DCP123 /dev/sdb1


Run nautilus in Terminal to get a root GUI file manager.

sudo apt install nautilus
sudo nautilus

Then copy the dcp directory to the hard drive in the Files/Nautilus file manager.

Then make the dcp directory read-only and executable:
In Terminal use the chmod command on the folder you made.

sudo chmod -R 755 /media/kese/harddrivename/foldername

Note:
To make the ext 2/3 partition without reformatting, you can use parted.
More detailed explanation in the ISDCF Disc File Format guide and here 

In terminal. Install parted.

sudo apt-get install parted

Use parted to make an MBR partition

sudo parted /dev/sdb mklabel msdos

run mkpart and make an ext 3 partition

sudo parted -a opt /dev/sdb mkpart primary ext 3 0% 100%

then format the partition with -I 128 inode

ext3
sudo mkfs.ext3 -I 128 -L DCP123 /dev/sdb1
ext2
sudo mkfs.ext2 -I 128 -L DCP123 /dev/sdb1

Verifying

You can verify the hash values in the trial version of EasyDCP Player or using this command and compare the values to values in the XML files:
openssl sha1 -binary "FILE_NAME" | openssl base64

Note:
If you use Extfs for windows or Extfs for mac to mount the Linux hard drive, you can enable it to be mounted read-only.

Note: MBR NTFS
MBR NTFS 1 partition hard drives are readable by the older Linux version used on Doremi/Dolby and other players/servers. MBR has a limit of 2 TB so a 50 USD 1 TB Western digital hard drive is suitable. (Amazon link)
MBR NTFS are used on some DCP hard drives.
It can be easier if you are in a hurry to download a DCP directly to a 1 MBR NTFS hard drive.

You can format a 1 partition MBR NTFS hard drive in Windows using
Computer Management –
Storage – Disk Management.
When right clicking the Disk and it says “Convert to GPT”, the disk is MBR.

If it is Exfat you can right click the volume and format it to NTFS

If it is says “convert to MBR”, the disk is GPT. To convert it to MBR you need to delete the partitions/volumes on the disk and then you can convert it to MBR and format it.

Note: exFAT is not supported:
New Linux distributions supports exFAT.  Cinema DCP servers/players use older Linux versions, which do not natively support exFAT formatted hard drives.

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Tips on Digital Cinema Theatre DCP test screenings

Before you check your DCP in a movie theatre, you need to know the specification of the movie theatre you are using.

Here are some question you could ask:
-Are the scope and flat presets without cropping?
35 mm cinemas often cropped much of the picture to mask the fact that the projector is tilted. Even with lens shift, some digital cinemas still has tilted projectors that need presets for scope and flat with cropping to fit the masking on the screen. This hides the fact that the shape of the picture often has a trapezoid shape. For a test screening of a DCP you could ask for a preset on the projector without cropping, this way you could watch for artifacts on the edges of the picture. You should also consider that the film will be shown in theatres with cropping, so you need to use safe zones. Also consider that a 1920×1080 DCP could reveal that the projector is tilted and the picture has a trapezoid shape, so scaling and cropping 1920×1080 material to 1998×1080 (Flat) when you make the DCP should be an option. If you want to watch the movie with better perceived contrast you should use the standard presets.

-Is the peak white luminance 14 Fl on the screen?
See this post for more info.

-How is the uniformity?
Old 3D screens can have bad uniformity.

-Is the sound correct?
See this post for more info.

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Tips on converting Film Festival programmes to the DCP (Digital Cinema Package) format.

This year I converted all films that was not 35 mm or DCPs at the Films from the North 2011 section at Tromsø International Film Festival 2011 to DCPs. In total I made 33 DCPs (about 10 hours) in two weeks. I was also responsible for screening the DCPs at the film festival. I checked the sound level on each DCP in the cinema theatre and wrote down what level they should be played back at. I also wrote down what audio preset should be used (5.1 or 2.0 with Pro Logic decoding). If you are converting to the DCP format for screenings where you will not be present I recommend using standard cinema level 5.1 sound mixes.

Here are some tips if you are thinking about converting a film festival programme to DCPs:

    I recommend using batch processesing when making DCPs of short films, I used Fraunhofer Easydcp + to make 1-5 DCPs each night.
    Have a tested worfklow before the festival films arrives. It must cover both interlaced and progressive material. Standard definition and high definition. Stereo and 5,1 sound. Material that has subtitles outside the safe zone and material that does not use a standard resolution. . .
    Use different quality control stages, I recommend two computer screens so you can look at the material fullscreen 1:1 . I recommend using the RGB parade scope in Apple Color/Resolve to check how the source is color corrected/graded. I recommend checking the DCPs in a movie theatre, preferably the screen you will screen the film at or one that is suited.
    Find out how much the picture is cropped at the theatre where the films are screened. Also check for a 1920×1080 1.77 preset.
    If using 25 fps or 30 fps DCPs, check if they work in the theatre that will be screening the films.
    If using DCPs with stereo sound make sure the theatre has Dolby Pro Logic 1 or 2 decoding or something similar to get the speech in the center channel. If a stereo soundtrack is played in stereo everyone on the right side of the screen will hear speech coming from the right and those one the left will hear it coming from the left.
    In total I made 33 DCPs (about 10 hours) in two weeks. I always had 1-5 DCPs being made each night that I tested the next day. I could convert 1,5 hours from one day to the next with easydcp + on a quad core computer. Some people uploaded their films as Prores quicktime to a FTP server or used Filemail Corporate instead of delivering on Digibeta or HDCam. This helped speed things up.