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Playback over DVI from MacBook to DCI-P3 projector (709 to P3 ICC?)

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Chris Tipton-King
Playback over DVI from MacBook to DCI-P3 projector (709 to P3 ICC?)
on Dec 12, 2013 at 6:27:55 pm

Hi All,
I've done a lot of googling, and have yet to come up with a solid answer for this admittedly unusual workflow.

In a nutshell, I need to display Rec 709 content from my Mac over DVI on a DCI-P3 projector.

My university (San Francisco State) has a DCI-P3 projector (an NEC NC1200C) in its Cinema theatre. Unfortunately, there is no DCP player. The projector has DVI inputs, but no controls for switching the color space between DCI-P3 and Rec.709. When connected to my Mac, it appears like a TV in the Displays pane of System Preferences-it displays a TV icon, and defaults to "1080p" instead of the native 2048x1080, so I think my mac is assuming it's a Rec.709 device.

When I run content that I graded on a Rec.709 monitor on the projector via the mac, it looks awful—mostly, it looks very dark. When I use Display Calibration Assistant to adjust the output gamma, I get OK results, but I assume I'd get much better results if I actually did a proper transform into P3. Is there a monitor ICC that will allow the Mac to properly display color on the projector? I've seen mentions of one included with AfterEffects, can I use it as a display profile? (I should also mention I don't have a copy of AE handy). Or is the proper solution to apply the 709 to P3 LUT to the film in Resolve?

Thanks so much for your input!


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Robert Houllahan
Re: Playback over DVI from MacBook to DCI-P3 projector (709 to P3 ICC?)
on Dec 12, 2013 at 7:32:46 pm

Does the projector have a SDI input? Instead of DVI get a Blackmagic Mini Monitor to go SDI out to the projector and maybe it will display REC709 correctly?

-Rob-

Robert Houllahan
Director / Colorist
Cinelab Inc.
http://www.cinelab.com

2X Resolve 18Tb and 24Tb Dual GTX580's HD Telecine and 4K Film scanner plus a film lab.


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Chris Tipton-King
Re: Playback over DVI from MacBook to DCI-P3 projector (709 to P3 ICC?)
on Dec 12, 2013 at 9:19:26 pm
Last Edited By Chris Tipton-King on Dec 12, 2013 at 9:26:48 pm

Thanks. I do have a mini monitor—I'll try that. My problem then is sound output, I don't have a way of demuxing the sound out of the SDI signal.

I suppose the next step if that works would be to buy a SDI to analog audio box. The HDLink Pro might work.


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michael stirling
Re: Playback over DVI from MacBook to DCI-P3 projector (709 to P3 ICC?)
on Dec 13, 2013 at 12:58:31 pm

Seems to me that if it's a cinema theatre they would have a standard way of displaying provided (at least HD) content. Why wouldn't you just give them your film in the format they require?

M


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Chris Kenny
Re: Playback over DVI from MacBook to DCI-P3 projector (709 to P3 ICC?)
on Dec 13, 2013 at 1:16:20 pm

The 'right' way to do this is to connect to the projector with the Digital Cinema Communicator app (DCC) and create a title for Rec. 709 input. DCC is a Windows app (runs fine in a virtual machine on a Mac, though) that can be downloaded from the projector itself if you can get on the same network the projector is on, find out its IP address, and connect to its internal web server. You might also need a service code for the projector to get it to let you set up titles.

If that's not possible, applying the Rec. 709 to P3 LUT in Resolve should work in theory, but I haven't tested that particular workflow. I have tested feeding Rec. 709 to a cinema projector displaying XYZ color via the Rec. 709 to XYZ LUT in Resolve 10, and that seems to work fine.

--
Digital Workflow/Colorist, Nice Dissolve.

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