On 2 August 2014 01:06, Carsten Kurz <audiovisual@t-online.de> wrote:
.... 

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.

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?
 
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











_______________________________________________
DCPomatic mailing list
DCPomatic@carlh.net
http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic



--
Ben Edwards, Video Editor and Cameraman
web:www.nkytwig.com mobile:07773 02 44 82 skype:funkytwig twitter:@funkytwig
iContact Community Video | Bristol Community Channel