1413482 - MS Excel is not updated when using screensharing

Status: RESOLVED WONTFIX

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

Description

[yknetg]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:56.0) Gecko/20100101 Firefox/56.0
Build ID: 20171024165158

Steps to reproduce:

1. Open MS Excel.
2. Capture the window with getUserMedia mediaSource: 'window' and display it in a local video tag.
3. Edit some cells.


Chrome has the same bug.

https://bugs.chromium.org/p/chromium/issues/detail?id=778567


Actual results:

The video is not updated.


Expected results:

The local video should show the cells update with the text you enter in real time.

Comment 1

[yknetg]

This is windows 10 specific.

Comment 2

[Nils Ohlmeier [:drno]]

Jib: any idea who has the combination of Win 10 + Excel to repro this?

Comment 3

[Jan-Ivar Bruaroey [:jib] (needinfo? me)]

I have Win 10. Can look tomorrow. Looks like an upstream bug. Dan, any thoughts?

Comment 4

[Dan Minor [:dminor]]

This was closed upstream as WONTFIX. The interesting bit was this:

"There may be a little overlaps you didn't notice. In that case, we can't do the cropping-office-window-out-of-screencapture work and have to switch back to GDI capture, e.g. printWindow()/BitBlt() methods, which is known not working with modern UI apps on Win8/10."

I just double checked and we only seem to use GDI capture in Firefox. There's code in tree for a DirectX based capturer that we're not using. I'm not sure if that is what is being referred to above, or if we need to pick up something else the next time we do an update.

Comment 5

[Andreas Pehrson [:pehrsons]]

Since we use the same code for capture, I'm closing this accordingly.

Comment 6

[yknetg]

FYI,

It seems that Chrome resolved this. Now it works on chrome.
But Firefore still can't work.

Comment 7

[yknetg]

Sorry, I've misunderstood.
Chrome has not changed. 

But there is some cases that chrome can share it but firefox can't even if it's in the same situation.

For example, in the case below.

-------------------------------------------
|                                         |
| (powerpoint)   (chrome sharing the ppt) |
|                                         |
-------------------------------------------