1686912 - videos are semi transparent if I'm not in fullscreen mode

Status: RESOLVED DUPLICATE of bug 1677241

(Core :: Graphics, defect, P3)

Description

[Toadfield]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

Go to a youtube video and play it in windowed mode.
That bug doesn't happen in Fullscreen.

Actual results:

It is semi transparent vin windowed,like this:
https://i.imgur.com/iErS8K9.png

Expected results:

That it isn't transparent.

"layers.acceleration.force-enabled" to "true" doesn't help.
Here my "about:support":
https://pastebin.com/zuyUVMEi

Comment 1

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

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

[Toadfield]

(In reply to Release mgmt bot [:sylvestre / :calixte / :marco for bugbug] from comment #1)

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Did it:https://github.com/mozilla/bugbug/issues/2097

Comment 3

[Alastor Wu [:alwu]]

It seems to me that this is not a media related issue, because the video frame have been decoded and displayed correctly. But I'm also not sure what factor would impact the tranparency, move this bug to a graphic component to see if they have any idea.

Comment 4

[Andrew Osmond [:aosmond] (he/him)]

layers.acceleration.force-enabled is the old pref, which would force OpenGL. I expect this will still happen with WebRender, but can you verify by flipping gfx.webrender.all to true?

Comment 5

[Toadfield]

(In reply to Andrew Osmond [:aosmond] from comment #4)

layers.acceleration.force-enabled is the old pref, which would force OpenGL. I expect this will still happen with WebRender, but can you verify by flipping gfx.webrender.all to true?

With the second command set to true,then it still doesn't work.

Comment 6

[Toadfield]

(In reply to Andrew Osmond [:aosmond] from comment #4)

layers.acceleration.force-enabled is the old pref, which would force OpenGL. I expect this will still happen with WebRender, but can you verify by flipping gfx.webrender.all to true?

Oh,I had to restart firefox.
Now it works.
But why isn't that set to true by default?
I mean no one wants graphic bugs.

Comment 7

[Robert Mader [:rmader]]

Toadfield: just to verify: enabling Webrender did solve this issue for you?

Comment 8

[Toadfield]

yes

Comment 9

[bugzilla]

Bug 1686339 - Ghosting in non-fullscreen videos

Comment 10

[Martin Stránský [:stransky] (ni? me)]

It's dupe or Bug 1677241 then.