1948087 - Inaccurate tone mapping from BT.2020 to SDR

Status: NEW

(Core :: Graphics, defect, P3)

Description

[Bas Schouten (:bas.schouten)]

Attachment: out.webm

When playing back an HDR video in BT.2020 in Firefox on Windows it's rendered incorrectly. It seems to display in SDR both on an HDR and an SDR monitor. And on neither monitor does it properly do tone mapping into the browser colorspace. Small video snippet included. Will attach screenshots.

Comment 1

[Bas Schouten (:bas.schouten)]

Attachment: Chrome SDR display

Comment 2

[Bas Schouten (:bas.schouten)]

Attachment: Firefox SDR display

Comment 3

[Jim Mathies [:jimm]]

We don't support hdr video on windows yet from my understanding, pushing to graphics.

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:bhood, could you have a look please?

For more information, please visit BugBot documentation.

Comment 5

[Brad Werth [:bradwerth]]

Confirmed that it looks correct on macOS. Ashley, can you reproduce on Windows?

Comment 6

[Ashley Hale [:ahale]]

Implementing HDR video on Windows is my top priority, we know it's not implemented yet.

Comment 7

[Bas Schouten (:bas.schouten)]

I suspect Ashley knows this, but for the context of others on this bug, note that this isn't about -supporting HDR video- per se. But rather about our ability to display HDR videos in various color spaces in SDR. Currently our SDR display of HDR video content is buggy, which is somewhat of a bigger issue than just not displaying videos in HDR.

Comment 8

[Bas Schouten (:bas.schouten)]

As per discussion with Jeff making some adjustments to ensure this is classified correctly.

ni?ahale for visibility since I'm changing the dependency she set.

Comment 9

[Ashley Hale [:ahale]]

Makes sense, I'm going to be filing a handful of bugs for different playback situations (e.g. on Rec2100PQ RGB10A2, Rec2100PQ P010, and of course sRGB/displayP3/Rec2020 SDR BGRA8 scenarios on each platform) so that will be captured by the respective SDR bugs.