HDR...

[vincent kardasik]

One of my client recently asked me to create HDR content to showcase their new screens so I'm investigating more and more about that, especially the post-production part and how you export that.
Any of you had some experience with this?
Any content we should not capture to avoid some strange artefacts?
Da Vinci Resolve (Studio) would have been my call for that kind of job, any other recommandation?
Thanks in advance.

 

[Marc Wielage]

The problem lies more with monitoring and calibration. Which specific HDR format are they asking for? HDR10 is getting more and more common, but the ITU just came out with their new BT2000 standard a few days ago:

http://www.tvtechnology.com/news/0002/itu-announces-hdr-standard-for-tv/278938

There's this, Dolby Vision, and HDR10... all somewhat different.

 

[paulherrin]

thanks for the info marc, i had not heard about those... 8-bit is nasty!

puh-leeez let's get beyond 8-bit as quick as we can

i'm excited about some upcoming HDR 4k projection...

we do well to remember the difference between extreme/surreal tone-mapped 'hdr' and truly presenting a (moving) high dynamic range image.

 

[jake blackstone]

It's BT 2100, which is a successor of 2020. Not sure where 8 bit is coming from. HDR-10 is 10 bit and DV is 12 bit.

 

[vincent kardasik]

The problem lies more with monitoring and calibration. Which specific HDR format are they asking for? HDR10 is getting more and more common, but the ITU just came out with their new BT2000 standard a few days ago:

http://www.tvtechnology.com/news/0002/itu-announces-hdr-standard-for-tv/278938

There's this, Dolby Vision, and HDR10... all somewhat different.

They asked for Dolby Vision but also for HEVC HDR... I know a bit of the first one and I know only a few studios are able to produce it but the second one was a total mystery to me so far...

It's BT 2100, which is a successor of 2020. Not sure where 8 bit is coming from. HDR-10 is 10 bit and DV is 12 bit.

Thanks for the info Jake.

 

[Tyler Pruitt]

In order to grade Dolby Vision in Resolve you need a special unlock key from Dolby and a CMU box from Dolby to create the proper dynamic metadata.

 

[Stacey Spears]

HEVC HDR is easy. You set the transfer function flag to 16, which is 2084. This is what signals the display to go into HDR mode. You should also set display mastering info, which includes X, Y for red, green, blue and white. You also set min and max luminance and maxCLL and maxFALL. All of this can bet set in x265.

 

[vincent kardasik]

In order to grade Dolby Vision in Resolve you need a special unlock key from Dolby and a CMU box from Dolby to create the proper dynamic metadata.

Good to know, thanks Tyler!

HEVC HDR is easy. You set the transfer function flag to 16, which is 2084. This is what signals the display to go into HDR mode. You should also set display mastering info, which includes X, Y for red, green, blue and white. You also set min and max luminance and maxCLL and maxFALL. All of this can bet set in x265.

This is really helpful Stacey, I will give it a try next week, my 4K Sony panel should be able to monitor HDR according to its spec.
So far I used Handbrake to encode x265 but I was planning to move on Adobe Media Encoder as Premiere Pro CC is now supposed to be able to generate HDR.
Did you give it a try?

 

[Joel Arvidsson]

Is there any tutorials on different hdr workflows?

 

[vincent kardasik]

Is there any tutorials on different hdr workflows?

+1 Would be great!

 

[Marc Wielage]

It's BT 2100, which is a successor of 2020. Not sure where 8 bit is coming from. HDR-10 is 10 bit and DV is 12 bit.

Pardon me, Jake is 100% right -- it is BT 2100.

Is there any tutorials on different hdr workflows?

I would start with Alexis Van Hurkman's 10,000-word article:
http://vanhurkman.com/wordpress/?p=3548

And you could read the Dolby Vision white paper:
http://www.dolby.com/us/en/technologies/dolby-vision/dolby-vision-white-paper.pdf

Dado Valentic's piece is very good:
https://www.linkedin.com/pulse/hdr-survival-guide-next-generation-home-dado-valentic

Sony relates their BVM-X300 monitor and how it applies to HDR monitoring and delivery:
https://issuu.com/sonyprofessional/docs/ca_hdr_excerpt

SpectraCal has a free paper on HDR (which you have to register in order to download):
http://calman.spectracal.com/hdr.html

and the BBC has an interesting piece on their approach:
http://downloads.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP309.pdf


I have yet to see anybody deliver a thorough explanation about how to finish and deliver HDR and Rec2020 / BT2100 for a project from start to finish.