2 Aug
2014
2 Aug
'14
10:33 a.m.
On 2 August 2014 01:06, Carsten Kurz <audiovisual(a)t-online.de> wrote:
....
Thanks. I seem to remember it is possible to convert un-encrypted DCP to
other formats playable on computers. so its either full encryption/KDM or
totally open and piratable?
Some high end codecs may occasionally cause problems with
FFMPEG/DCP-o-matic, better check compatibility with a short snippet before
you create the full length file. DCP-o-matic will usually tell you right
away if it has a problem with the specific codec.
I guess my question was is 4444 overkill (have started another thread on
this as it
is a different question). 'compatibility with a short
snippet', is this a Premiere Pro CS6 output option, I have not come across
it. Being sent export via post so need to try to get it right first time.
Also in terms of creating a DCP with requires a
KDM key what setting
shall I use. I ask because I played around with this a wile
ago and it did
not work. No error, it just did not create the file.
If you don't get a certificate, it makes no sense to encrypt the content
(which is a prerequisite to creating a KDM), because the DCP will not play.
You can also NOT test your encrypted DCP, unless you have access to that
specific projection system, or a software DCP player with support for
encrypted DCPs (which will allow to create it's own certificate to be used
by DCP-o-matic) so, make sure you also create an unencrypted version first,
test it, then create the encrypted version without altering ANY other
options. Encryped content may cause lost shows - make sure you are prepared
and have an unencrypted version at hand if the encrypted version fails.
You should also use the most current version of
DCP-o-matic, as encryption
is a fairly recent feature.
Also, DCP-o-matic has a choice of creating SMPTE or Interop compliant DCPs
AND KDMs - both need to fit either standard, and I suggest to go the 'old'
Interop way, that is, create an encrypted Interop DCP, then create a KDM
type 'Modified Transitional 1' (wink wink, Wolfgang ;-)
OK, where do I add certificate, cant see it in 'Make KDM'?
Try NOT to create a stereo audio track. Surrounds and LFE can be omitted,
but a dedicated center channel really is advisable. Take care about audio
levels, Cinema audio usually uses a large headroom to accommodate for very
loud action sound. 'Traditional' audio leveling with less headroom will
usually turn out too loud in cinemas.
Interesting point, I actually project at a cinema and the commercial DCPs
we get have sound levels all over the place. The logo audio are sometimes
very loud, and this may be for the reason you say, but that makers the film
too quiet. We tend to put an audio queue at the beginning that raises the
volume after logo. Basically we have to play bits of the film to set the
levels. There is also the issue that a full auditorium sucks up a lot of
audio so the level needs to be higher but lets not get into this.
Ben
- Carsten
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