994282 - Video playback has a clipped area. Linux.

Status: VERIFIED FIXED

(Core :: Audio/Video, defect)

Description

[Hubert Figuiere [:hub]]

Attachment: Screenshot from 2014-04-09 15:52:47.png

Go to, for example https://air.mozilla.org/webrtc-meet-up-francophone-paris/ using m-c on Linux (no problem with Nightly on Mac)

Play the video. The playback region is clipped.

See screenshot.

Comment 1

[Hubert Figuiere [:hub]]

The poster image is fine.

Also I don't have Flash.

Comment 2

[Hubert Figuiere [:hub]]

Also Youtube works fine.

Comment 3

[Chris DeCairos (:cade)]

I'm getting this as well (FX Nightly 2014-05-15 / Fedora 20)

I don't see any clipping unless I hover the mouse on and off a page or chrome element that has some kind of css hover attribute.

I have gstreamer preffed off.

Comment 4

[Nick Thomas [:nthomas] (UTC+12)]

I see this too, but on Mac nightly, and the video that is shown is in the top left. Also discovered that it works fine on my secondary monitor, but not on the retina display. HiDPI issue ?

Comment 5

[Edwin Flores [inactive from 2016-12-01] [:eflores] [:edwin]]

This seems to only happen when the <video> has a border-radius. It looks like we're applying a mask that's offset from the video, by the same offset of the video to the window.

Comment 6

[Edwin Flores [inactive from 2016-12-01] [:eflores] [:edwin]]

Bisected to:

changeset:   176455:433b95e605bf
user:        Matt Woodrow <[e-mail]>
date:        Tue Apr 01 12:02:09 2014 +0800
summary:     Bug 989858 - Part 3: Convert BasicImageLayer. r=roc

Comment 7

[Matt Woodrow (:mattwoodrow)]

Attachment: Put transforms in the right order

Comment 8

[Matt Woodrow (:mattwoodrow)]

(In reply to Nick Thomas [:nthomas] (PTO Apr 17-27 PST) from comment #4)
> I see this too, but on Mac nightly, and the video that is shown is in the
> top left. Also discovered that it works fine on my secondary monitor, but
> not on the retina display. HiDPI issue ?

This suggests that you're not getting hardware acceleration. Did you disable it on purpose?

Comment 9

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Comment on attachment 8410699 [details] [diff] [review]
Put transforms in the right order

Review of attachment 8410699 [details] [diff] [review]:
-----------------------------------------------------------------

reftest?

Comment 10

[Matt Woodrow (:mattwoodrow)]

https://hg.mozilla.org/integration/mozilla-inbound/rev/3be5a3af4e6a

Comment 11

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/mozilla-central/rev/3be5a3af4e6a

Comment 12

[Nick Thomas [:nthomas] (UTC+12)]

(In reply to Matt Woodrow (:mattwoodrow) from comment #8)
> This suggests that you're not getting hardware acceleration. Did you disable
> it on purpose?

Possibly in response to some issue a long time ago, layers.offmainthreadcomposition.enabled was set to false.

Comment 14

[[SV Manager] Florin Mezei, QA (:FlorinMezei)]

Reproduced the issue on Nighlty from 2014-04-09.
Verified on Firefox 31 Beta 3 (Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 - BuildID: 20140619131915). 

The video is no longer clipped, but the controls are clipped and flicker when fading away. This is tracked separately in bug 1028237.