1949088 - HEVC 10-bit playback washed out.

Status: UNCONFIRMED

(Core :: Graphics: Color Management, defect)

Description

[mcortt]

Attachment: media.hevc.enabled = true

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Steps to reproduce:

Play any HEVC 10-bit video

Actual results:

Colors are washed out with media.hevc.enabled on. Turning it off resolves the issue.

Expected results:

colors should at least appear somewhat normal
may be related to this change
https://bugzilla.mozilla.org/show_bug.cgi?id=1948404

Comment 1

[mcortt]

Attachment: media.hevc.enabled = false

Comment 2

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

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[Alastor Wu [:alwu]]

Could you provide a video link for us to debug? Thanks.

Comment 4

[mcortt]

https://lf-tk-sg.ibytedtos.com/obj/tcs-client-sg/resources/video_demo_hevc.html

This has multiple videos you can test. Anything under HEVC main 10 seems to do it. The SDR stuff only does it full-screen usually, the HDR stuff does it all the time which is to be expected (lack of HDR support and so forth).

I mainly notice it when playing anything HEVC main10 on Plex. IDK if it is cause the browser reports it support main10 or what, but Plex doesn't seem to want to or try to transcode it or do any HDR to SDR tone mapping.

Comment 5

[Alastor Wu [:alwu]]

(In reply to mcortt from comment #0)

Colors are washed out with media.hevc.enabled on. Turning it off resolves the issue.

This isn't for the website you linked in comment 4, right? If you disable the pref, HEVC support is removed entirely, and all videos on that page will become unsupported. I believe for the website where you reproduced the issue, disabling HEVC support forces it to use a different codec instead.

Comment 6

[Alastor Wu [:alwu]]

Jeff, do you know the status of HDR support? Do we have that on Windows yet? Thanks!

Comment 7

[Jeff Muizelaar [:jrmuizel]]

We support HDR on macOS not on Windows.

Comment 8

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

The component has been changed since the backlog priority was decided, so we're resetting it.
For more information, please visit BugBot documentation.