1898497 - 360deg youtube 8k AV1 video playback low framerate

Status: NEW

(Core :: Graphics, defect)

Description

[Jim Mathies [:jimm]]

Low frame rate, respectable graphics card w/av1 hardware decoding support.

https://www.reddit.com/r/firefox/comments/1cygytd/this_360_8k_youtube_video_is_slow_as_hell_in/

Comment 1

[Jim Mathies [:jimm]]

Attachment: about support

Comment 2

[Jim Mathies [:jimm]]

https://share.firefox.dev/3US5v5o

Comment 3

[Jim Mathies [:jimm]]

Even though about:support reflects av1 hardware support, Paul tells me I'm not getting it.

because it's very clear in the log: (PlatformDecoderModule) WMFDecoderModule::CreateVideoDecoder failed for manager with description wmf AV1 codec software video decoder - no DXVA, nv12 with result: NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005) - MediaResult __cdecl mozilla::WMFVideoMFTManager::InitInternal(void): Use VP8/VP9/AV1 MFT only if HW acceleration is available.

Comment 4

[Jim Mathies [:jimm]]

https://share.firefox.dev/4aNnn7z

I'm seeing major jank in CanvasRenderer.

Comment 5

[Jeff Muizelaar [:jrmuizel]]

This happens on https://www.youtube.com/watch?v=JJAxCJWyUfQ

Comment 6

[az [:az]]

I'll take a look at the AV1 support reporting.

Comment 7

[Jim Mathies [:jimm]]

I've installed a newer gfx card and the performance has improved quite a bit. Probably just slowness related to 8K video and software decoding.

Comment 8

[rhialto]

Nothing new? I thought reading https://www.neowin.net/news/mozilla-fixes-youtube-playback-issues-in-firefox/ that would possibly mean issue have been fixed but no.

Comment 9

[rhialto]

Any update?