Topics

Split screen SDR/HDR

Geoff Boyle
 

I need help.

 

I’m struggling.

 

I can make an HDR DCP no problem, I can make an SDR DCP no problem.

 

How on earth do I do a split screen of SDR and HDR?

 

I want to show the same footage split screen, please don’t tell me to use 2 projectors 😊

 

It’s for a presentation I’m doing at IBC.

 

I feel that I’m missing something obvious.

 

Cheers

 

Geoff Boyle NSC FBKS

Cinematographer

Netherlands

www.gboyle.nl

 

Nick Shaw
 




On 3 Aug 2018, at 17:14, Geoff Boyle <geoff@...> wrote:

I need help.

 

I’m struggling.

 

I can make an HDR DCP no problem, I can make an SDR DCP no problem.

 

How on earth do I do a split screen of SDR and HDR?

 

I want to show the same footage split screen, please don’t tell me to use 2 projectors 😊

 

It’s for a presentation I’m doing at IBC.

 

I feel that I’m missing something obvious.

 

Cheers

 

Geoff Boyle NSC FBKS

Cinematographer

Netherlands

www.gboyle.nl

 

Nick Shaw
 

On 3 Aug 2018, at 17:14, Geoff Boyle <geoff@...> wrote:

How on earth do I do a split screen of SDR and HDR?
Sorry for the accidental empty reply!

You need an HDR DCP in which one half of the screen only uses the SDR range within the HDR projection. I.e. encoding SDR using an HDR EOTF.

Funnily enough I was building a LUT to do something very similar earlier today, only for an HDR monitor, not projection.

Contact me off list, and I should be able to help.

Nick Shaw
Workflow Consultant
Antler Post
UK

Anne Boyle
 

Hey Geoff

Depending on what is available to you colour management wise, you may be able to use a Lut to "emulate" what the SDR grade will look like, but on your HDR grading display. In which case you could have both renders in a split screen on on HDR display. This is a hack of course ....  but would probably work for you 

best 

Anne Boyle
Colourist 
Technicolor 

hope this helps 

On 3 August 2018 at 12:14, Geoff Boyle <geoff@...> wrote:

I need help.

 

I’m struggling.

 

I can make an HDR DCP no problem, I can make an SDR DCP no problem.

 

How on earth do I do a split screen of SDR and HDR?

 

I want to show the same footage split screen, please don’t tell me to use 2 projectors 😊

 

It’s for a presentation I’m doing at IBC.

 

I feel that I’m missing something obvious.

 

Cheers

 

Geoff Boyle NSC FBKS

Cinematographer

Netherlands

www.gboyle.nl

 

valentin alt
 

Hi Goeff,

It’s a different technology. The most accurate way would be to use 2 projectors side by side.
But I think in this case you need to have one HDR DCP and use a grading or maybe a existing LUT to make it look like SDR on HDR

So one side you get the HDR grading and the other side a simulation of the SDR image on the same DCP

Hope it makes sens

Cheers,

Valentin Alt
Cinematographer 
France and Los Angeles 

On 3 Aug 2018, at 6:14 PM, Geoff Boyle <geoff@...> wrote:

I need help.

 

I’m struggling.

 

I can make an HDR DCP no problem, I can make an SDR DCP no problem.

 

How on earth do I do a split screen of SDR and HDR?

 

I want to show the same footage split screen, please don’t tell me to use 2 projectors 😊

 

It’s for a presentation I’m doing at IBC.

 

I feel that I’m missing something obvious.

 

Cheers

 

Geoff Boyle NSC FBKS

Cinematographer

Netherlands

www.gboyle.nl

 

Tom Tomlinson
 

can you utilize this aja product?


it can simulate SDR on an HDR display?

On Fri, Aug 3, 2018 at 6:20 PM, Nick Shaw <nick@...> wrote:
On 3 Aug 2018, at 17:14, Geoff Boyle <geoff@...> wrote:

How on earth do I do a split screen of SDR and HDR?
Sorry for the accidental empty reply!

You need an HDR DCP in which one half of the screen only uses the SDR range within the HDR projection. I.e. encoding SDR using an HDR EOTF.

Funnily enough I was building a LUT to do something very similar earlier today, only for an HDR monitor, not projection.

Contact me off list, and I should be able to help.

Nick Shaw
Workflow Consultant
Antler Post
UK




--
Tom Tomlinson

212-683-1704 l


352 Park Avenue South, 16th Floor, NY, NY, 10010

Geoff Boyle
 

Great piece of kit, I’m trying to figure out how I’d use it.

 

Then I’ll have to blag one from AJA as $8K is a bit too much for an IBC presentation 😊

 

Cheers

 

Geoff Boyle NSC FBKS

Cinematographer

Netherlands

www.gboyle.nl

 

From: cml-post-vfx-aces@... <cml-post-vfx-aces@...> On Behalf Of Tom Tomlinson
Sent: 04 August 2018 01:58
To: cml-post-vfx-aces@...
Subject: Re: [cml-post-vfx-aces] Split screen SDR/HDR

 

can you utilize this aja product?

 

 

it can simulate SDR on an HDR display?

 

On Fri, Aug 3, 2018 at 6:20 PM, Nick Shaw <nick@...> wrote:

On 3 Aug 2018, at 17:14, Geoff Boyle <geoff@...> wrote:


How on earth do I do a split screen of SDR and HDR?

Sorry for the accidental empty reply!

You need an HDR DCP in which one half of the screen only uses the SDR range within the HDR projection. I.e. encoding SDR using an HDR EOTF.

Funnily enough I was building a LUT to do something very similar earlier today, only for an HDR monitor, not projection.

Contact me off list, and I should be able to help.

Nick Shaw
Workflow Consultant
Antler Post
UK



 

--

Tom Tomlinson

212-683-1704 l


352 Park Avenue South, 16th Floor, NY, NY, 10010

Steve Shaw
 

It would be easy to make a LUT to correctly scale the SDR imagery, so it is 'SDR correct' on the HDR display.
You have LightSpace, so it would be very easy to generate.
(Just use the Colour Space Conversion to generate a technical HDR to SDR LUT.)

Let me know if you need help with that.

Steve

Nick Shaw
 

It also depends what you are trying to show on the SDR side of the screen. If you are using a Dolby Cinema projector for example, which can do darker blacks as well as brighter whites, do you want to show what SDR could look like on that projector, or do you want to raise the blacks to simulate what it would look like on a normal SDR projector?

Nick Shaw
Workflow Consultant
Antler Post
UK

On 4 Aug 2018, at 09:02, Steve Shaw <steve@...> wrote:

It would be easy to make a LUT to correctly scale the SDR imagery, so it is 'SDR correct' on the HDR display.

Bruno Munger
 

Hi Geoff

We do this often here at Colorfront for presentation. I.e. SDR/HDR onHDR  projection or Emissive display in a single DCP. 

you can contact me offline, we'd will gladly help. 


thanks 

On Fri, Aug 3, 2018 at 9:14 AM, Geoff Boyle <geoff@...> wrote:

I need help.

 

I’m struggling.

 

I can make an HDR DCP no problem, I can make an SDR DCP no problem.

 

How on earth do I do a split screen of SDR and HDR?

 

I want to show the same footage split screen, please don’t tell me to use 2 projectors 😊

 

It’s for a presentation I’m doing at IBC.

 

I feel that I’m missing something obvious.

 

Cheers

 

Geoff Boyle NSC FBKS

Cinematographer

Netherlands

www.gboyle.nl

 




--
Bruno Munger

Geoff Boyle
 

I'll contact Nick, Steve & Bruno directly but what I'm trying to do is show the camera evaluations with one side  SDR and the other HDR.
There are CML charts on both sides of the screen.
I'd also like to run some simple landscapes sequentially, first SDR then HDR.
I'm having fun at the moment switching the material I shot this morning back and forth.
Staggering, WTF are we worrying about resolution when this has a far bigger impact on what we see. 


cheers
Geoff Boyle NSC
EU based cinematographer
+31 637155076
www.gboyle.co.uk


On Sat, 4 Aug 2018, 11:28 Bruno Munger, <brunomunger@...> wrote:
Hi Geoff

We do this often here at Colorfront for presentation. I.e. SDR/HDR onHDR  projection or Emissive display in a single DCP. 

you can contact me offline, we'd will gladly help. 


thanks 

On Fri, Aug 3, 2018 at 9:14 AM, Geoff Boyle <geoff@...> wrote:

I need help.

 

I’m struggling.

 

I can make an HDR DCP no problem, I can make an SDR DCP no problem.

 

How on earth do I do a split screen of SDR and HDR?

 

I want to show the same footage split screen, please don’t tell me to use 2 projectors 😊

 

It’s for a presentation I’m doing at IBC.

 

I feel that I’m missing something obvious.

 

Cheers

 

Geoff Boyle NSC FBKS

Cinematographer

Netherlands

www.gboyle.nl

 




--
Bruno Munger