Creating a DCP-o-matic Workstation

Anything and everything to do with DCP-o-matic.
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Cinematheque_Van
Posts: 1
Joined: Fri Apr 24, 2020 8:41 pm

Creating a DCP-o-matic Workstation

Post by Cinematheque_Van »

Hello,

I'm using this shutdown period to research building a new dedicated workstation for converting digital film files to dcps using DCP-o-matic. We've been using DCP-o-matic for years, including recommending it to all of our rental clients. As a cinema, we've never wanted to be in the 'business' of DCP creation but we're finding the burden increasingly being placed on our shoulders and at the last minute. Our current average transcode time is about 13 hours for a typical feature film. Ideally we'd like to bring that down to 30 minutes or less, as we still need 30-60 minutes to ingest on to server.

The broad strokes of what I have in mind would be an Ubuntu OS, Ryzen Threadripper 3970X, 32 GG of RAM, and a 1 TB SSD. Does anyone here have experience with a similar system and can give an estimate for DCP-o-matic creation rates? Is Cinebench the closest benchmark I should be looking at for performance, or is there something closer out there? I'm also planning on putting a blu-ray optical drive in, to enable ripping of optical media and converting to DCP, and the planned installation of USB 4.0 when it comes to market. Will it be more efficient to write to internal SSD and then transfer to a portable HD Dor write directly to portable HDD? Any important considerations when selecting a motherboard for this application other than the correct socket?

Thanks,

Al

Carsten
Posts: 1581
Joined: Tue Apr 15, 2014 9:11 pm
Location: Germany

Re: Creating a DCP-o-matic Workstation

Post by Carsten »

There is a range of benchmarks here:

https://dcpomatic.com/benchmarks/input.php?id=1

They are a bit optimistic against real life footage in flat (the Sintel is CGI in scope=fewer pixels), and, times goe up considerably in 4k.

In general - clock speed or other high performance features will be less important than number of cores/threads, as DCP-o-matic is scaling very good with the number of cores/threads.

In general, Threadrippers or Ryzen make up the best value machines currently. However, you may need to network two of these machines to get closer to your 30min goal. I think the best value for money currently is the Ryzen 9 3950X, and especially the Ryzen 9 3900X.

A threadripper would only have some benefit in a dual CPU mainboard. But altogether, that will be much more expensive that two networked Ryzen 9.

https://www.cpubenchmark.net/high_end_cpus.html



- Carsten

scozz76
Posts: 52
Joined: Sun May 15, 2016 10:13 am

Re: Creating a DCP-o-matic Workstation

Post by scozz76 »

When you crack the 30mins DCP creation time, please post your machine specs :)

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