DISCLAIMER: SINCE RELEASING THIS POST I HAVE BEEN CONTACTED BY PROFESSIONAL DCP ENCODING LABS POINTING OUT FLAWS IN THE WAY OpenDCP CREATES DCPs. PLEASE READ DAVID MARGOLIS'S POST IN THE COMMENTS SECTION BELOW AND CONSIDER USING A PROFESSIONAL LAB.
The standard DCP resolutions are:
2048 x 858 (2.39 aspect ratio) 4096 x 1716 (2.39 aspect ratio)
1998 x 1080 (1.85 aspect ratio) 3996 x 2160 (1.85 aspect ratio)
Some DCP servers will play back HD 1920x1080 but given that I rarely have a chance to test a DCP before a screening I opt to convert to standard resolutions.
Video is encoded as Jpeg 2000 image sequences and audio is encoded as uncompressed PCM in a WAV container at 24 bits per sample, 48 kHz or 96 kHz. These are then wrapped in MXF containers as designated by Digital Cinema Initiatives.
The software I use in this example is After Effects (although it could be done in most NLE or compositing packages), Audacity and OpenDCP.
A big thanks to Ian Banks, Clive Gillman and Alice Black at the DCA for allowing me to test the DCPs at their fantastic cinema while I was learning the process.
Step 1: Converting video to standard 2K image sequences.
Step 2: Converting Audio to DCP standard.
Audacity (freeware) and use the Change Speed effect to slow the audio down by 4%. This converts it from 25 to 24 frames a second.
Step 3: Converting the Tiffs into Jpeg2000.
Open DCP (freeware) and leave the Jpeg2000 Encoder Parameters and Image Parameters at their default settings. I then add the Tiff directory created previously to the Input Directory and create a new folder to hold the Jpeg2000 images under the Output Directory. Next I click Convert and wait for the Jpeg2000 images to be rendered.
Step 4: Creating the MXF files.
(According to dcpinfo.com, the Academy require a minimum of three audio channels, left, right and centre, for a DCP to qualify for an Academy Award. However DCP server systems seem happy with two channels of audio.)
Step 5: Creating the DCP.
great guide to best common practice on delivering DCP's.
The film in this demonstration was Rose Hendry's award nominated short Egg & Fag.