Reply-To: <stephen@sv2studios.com>
From: "Stephen van Vuuren" <stephen@sv2studios.com>
To: "'After Effects Mail List'" <AE-List@media-motion.tv>
References: <list-4760565@media-motion.tv>
In-Reply-To: <list-4760565@media-motion.tv>
Subject: RE: [AE] OpenDCP
Date: Fri, 29 Jun 2012 11:44:22 -0400
Organization: SV2 Studios
Message-ID: <013a01cd560e$0e071b10$2a155130$@sv2studios.com>
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> Here's a detailed blog post about creating DCPs:
>http://bitfilms.blogspot.com/2010/02/making-dcp-entirely-with-open-source.h
tml

That's very out of date and incomplete information (there is a newer article
linked in the post) - but it's also out of date as well. It's also missing a
lot of information you need (e.g. it's for a short, disk info in wrong for a
feature (EXT3 Linux needed). 

This is a better link:
http://www.mattcameronfilm.co.uk/2012/04/digital-cinema-package-tutorial.htm
l - but a couple of small points. AE is a better quality tool for XYZ
colorspace conversion and JPEG2000 encoding (Fnordware) than OpenDCP as
outline in the article.

If your soundtrack is stereo, a stereo DCP does load and play - however, you
may be very unsatisfied with how it sounds. That's why Academy/DCI recommend
3.1 or 5.1 as a minimum. Some venues playback stereo just through left and
right. The center and sub are not active, so it will sound flat, too soft
with no bass. However, some venues wire stereo through all 6 speaker
channels equally, which will blast out the theater.

You don't have to do a full 3.1 or 5.1 mix. Use something like
Vegas/Audition/ProTools etc. to create a simple 3.1 or 5.1 multiplex,
strongly weight to center/left/right with proper LFE crossover at theatrical
levels. A good mix should average around -12db but monitoring on a setup
weighted to -81db  or so is recommended. Do not push a broadcast mix out -
that has been compressed to -3 or -6. It will clip and theaters will be most
unhappy with you.

stephen van vuuren
336.202.4777

http://www.sv2dcp.com/
http://www.sv2studios.com/
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A film is - or should be - more like music than like fiction. It should be a
progression of moods and feelings. The theme, what's behind the emotion, the
meaning, all that comes later.
-Stanley Kubrick