1542662 - 4K video flickers black once per second or so using WebRender on FireStick 4K

Status: RESOLVED INCOMPLETE

(Core :: Graphics: WebRender, defect, P3)

Description

[Chris Pearce [:cpearce (Not reading bugmail)]]

While playing 4K video on the Amazon FireStick 4K with GeckoViewExample, approximately once per second I see what looks like a video frame painted as black.

I'm building GVE locally. This seems to be a recent regression; I updated by my mozilla-central source tree, and my FireOS (to 6.2.6.3(NS6263/2349)) on Friday, and this started happening.

Screencast:
https://youtu.be/mDCf-JjCnhc

Comment 1

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

Is this something we can find a regression range for?

Comment 2

[Chris Pearce [:cpearce (Not reading bugmail)]]

I realised I had preffed on WebRender for testing and forgotten to turn it off. Once I disable WebRender, the flickering stops. So I guess this is a problem with WebRender, or the interaction of the media stack with WebRender.

cpeterson: I assume that we're not planning on using WebRender in the FireStick/GV MVP, and so this doesn't need to be [gvtv:p1]?

Comment 3

[Chris Peterson [:cpeterson]]

(In reply to Chris Pearce [:cpearce (GMT+13)] from comment #2)

cpeterson: I assume that we're not planning on using WebRender in the FireStick/GV MVP, and so this doesn't need to be [gvtv:p1]?

That's correct. WebRender is not a priority for FFTV at this time.

Comment 4

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

Dropping the priority so graphics can re-triage as appropriate.

Comment 5

[u597032]

https://support.mozilla.org/en-US/kb/end-support-firefox-amazon-devices