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4K DCP Encoding

Posted: Mon Jan 03, 2022 7:10 pm
by Guddu
I will be receiving a 4K DCP with a DKDM and I will need to generate my own encrypted DCP after burning subtitles into it.

This is the first time I am working with a 4K DCP so wanted to ask the following

1. Is there anything I need to be careful about when working with a 4K DCP?

2. Can DOM work with 4K DCPs without any special considerations?

3. What should be the JPEG2000 Bandwidth for newly encoded data that I must select in the DCP generation process? I generally default to 150 Mbit/s but for 4K DCP what should it be?

Thanks in advance and Hapy New Year to all. :)

Re: 4K DCP Encoding

Posted: Mon Jan 03, 2022 10:11 pm
by Carsten
Why burn in, why not timed-text or PNG? That way you could save the re-encoding part. You could create a new OV, or a subtitled VF.

DCP-o-matic has no trouble with 4K. Depending on your CPU/memory combination, you may need to lower the number of compute/encoding threads in general prefs in order to prevent swapping (4k needs 4 times as much memory). If the machine get's into swapping because of not enough RAM, encoding will become painfully (and I mean PAINFULLY) slow.

You should probably set the datarate to 200MBit/s. Per spec, there is no difference in data rate between 2k and 4k DCPs.

- Carsten