Re: [DCP-o-matic] 4k

Am 09.06.2015 um 15:53 schrieb Carl Hetherington via DCPomatic: Do you mean J2C files or MXFs? If I get it right, I will only get J2Cs from DCP-o-matic when the 'push-to-disc' occurs. Yes, I could unwrap them... Here are two smallish 4k DCPs with the same pattern, one encoded with DCP-o-matic, one with Kakadu/FinalDCP. https://dl.dropboxusercontent.com/u/5582554/4kCheckerFlatOpenJPEG.zip https://dl.dropboxusercontent.com/u/5582554/4kCheckerFlatKakadu.zip I'm wondering how IMBs/J2C decoders actually select the resolution layers. If they simply have a numbering scheme instead of a formal 2k/4k qualifier, how would the IMB decide wether 'layer 6' is actually 4k or 2k? The Sony Projectors are all 4k, so for them it would make sense to simply choose the highest number. A DLP system would need to choose layer 6 or 7, but what if a layer 6 encoded with Kakadu is 4k, and with openJPEG it is 2k? The encoding parameters for Kakadu and OpenJPEG seem to make that difference between 6 and 7... NeoDCP player has no trouble to find/decode the 4k layer from both OpenJPEG and Kakadu. This is no formal evidence, but I think the bug is in the Doremi IMB software. - Carsten