Open Bug 1814535 Opened 3 years ago Updated 2 years ago

Software decoded HDR VP9 visually stutters on macOS

Categories

(Core :: Graphics: WebRender, defect)

Product:
Core
Component:
Graphics: WebRender
Platform:
Unspecified
macOS
Type:
defect

Tracking

()

People

(Reporter: bradwerth, Unassigned)

References

(Blocks 1 open bug)

Details

On a mac with Intel UHD 630 graphics, I navigate to https://www.youtube.com/watch?v=LXb3EKWsInQ and switch it to 2160p quality, then play it.

Here's a profile from that mac running macOS 10.15: https://share.firefox.dev/3X1u6ng. There is some stuttering. Chrome shows similar or worse stuttering.

Here's a profile from that same mac running macOS 13.2: https://share.firefox.dev/3jmcwfV. There is no stuttering.

macOS 10.15 does not allow hardware decode of VP9, so the difference here is due to our software decode performance.

See Also: → 1658392

2160p is fine now.
I can reproduce it on 1440p x2 speed by entering/exiting full-screen mode. There is a profile https://share.firefox.dev/3l3X0Wp .
Chrome doesn't have such issue btw.

Severity: -- → S3
Blocks: wr-video-perf
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