1322651 - WebRTC screen sharing artifacts when sharing applications

Status: RESOLVED INVALID

(Core :: WebRTC: Audio/Video, defect, P3)

Description

[Siarhei Simanovich]

Attachment: 2016-12-08_16-31-11.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36

Steps to reproduce:

Prerequisite: Windows 7 with Basic theme.
1. https://mozilla.github.io/webrtc-landing/gum_test.html
2. Share application (Windows Explorer, Skype)
3. Move other applications over one which shared.



Actual results:

There are artifacts on shared application.


Expected results:

Shared application should display correctly.

Comment 1

[Andreas Pehrson [:pehrsons]]

Siarhei, is this 100% reproducible?

Randell, do you know this code enough to reason about this? Will the 49 update affect this perhaps?

Comment 2

[Siarhei Simanovich]

(In reply to Andreas Pehrson [:pehrsons] (Telenor) from comment #1)
> Siarhei, is this 100% reproducible?
> 
> Randell, do you know this code enough to reason about this? Will the 49
> update affect this perhaps?

Yes

Comment 3

[Alex Chronopoulos [:achronop]]

I manage to repro in Windows 10 with Nightly. I see that the application is visible only when it is in the foreground. Also it's visible the window layout of the other application currently running in a yellow color. The same with release version 51 of Firefox.

Comment 4

[Randell Jesup [:jesup] (needinfo me)]

What Alex is seeing is the correct behavior - yellow

NOTE: Application sharing on Windows and Linux will not show any data which is not visible to the user -- i.e. if the window is obscured it will show as yellow.  If it's partially obscured, it will show as partially yellow. This is due to the APIs used to collect the data.  I *thought* Window sharing worked the same way, but it doesn't, at least not on Win10.

On a Win10 system running Nightly, I see exactly that behavior using https://mozilla.github.io/webrtc-landing/gum_test.html

Note I'm using the default theme.  Siarhei, does this reproduce using the default theme in Win7 or Win10?  Also, what Graphics chipset/driver/version are you using?

Comment 5

[Randell Jesup [:jesup] (needinfo me)]

Siarhei:
Can you also provide more explicit details: can you try it with a smaller browser window, and move around a smaller application window?  Does it work for some applications and not others?  could you provide a image of it working, then move a window a bit and an image of how it failed in that case?  Do you have one monitor or two?  Have you tried Nightly?  (https://nightly.mozilla.org/) 

Thanks!

I'm unable to see any artifacts on Win10/Nightly.

Comment 6

[Siarhei Simanovich]

Prerequisite: Windows 7 with Basic theme!!! 100% reproducible with a huge amount of applications.

Comment 7

[Andreas Pehrson [:pehrsons]]

Jesup, do you have a machine like that to test with?

Comment 8

[Bulk Bug Changes for mreavy's org]

Mass change P1->P2 to align with new Mozilla triage process

Comment 9

[Sylvestre Ledru [:Sylvestre]]

Moving to p3 because no activity for at least 1 year(s).
See https://github.com/mozilla/bug-handling/blob/master/policy/triage-bugzilla.md#how-do-you-triage for more information

Comment 10

[Andreas Pehrson [:pehrsons]]

We no longer support the application capture backend. Closing as invalid.