1055438 - Firefox Youtube HTML5 player wrong video dimensions (1918x1079)

Status: RESOLVED DUPLICATE of bug 1011390

(Firefox :: Untriaged, defect)

Description

[Trevonn]

Attachment: Example image

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0 (Beta/Release)
Build ID: 20140716183446

Steps to reproduce:

Enable HTML5 - https://www.youtube.com/html5
Open video - http://youtu.be/8Qi-WXWx_Xo
Fullscreen the video
Right Click --> Stats for nerds


Actual results:

Video Dimensions are 1918 x 1079 instead of 1920 x 1080


Expected results:

Video Dimensions should be 1920 x 1080

Comment 1

[Loic]

WFM
The stats display the resolution of the video, whatever if you're in fullscreen mode or not.
When I change from 720p to 360p (or vice versa), the resolution displayed is changed according to my choice (1280 x 720 or 40 x 360).

Could you test:
1) in safe mode:
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode

2) with a clean profile:
https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Comment 2

[Trevonn]

(In reply to Loic from comment #1)
> WFM
> The stats display the resolution of the video, whatever if you're in
> fullscreen mode or not.
> When I change from 720p to 360p (or vice versa), the resolution displayed is
> changed according to my choice (1280 x 720 or 40 x 360).
> 
> Could you test:
> 1) in safe mode:
> https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-
> mode
> 
> 2) with a clean profile:
> https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-
> firefox-profiles

It only happens in fullscreen. Are you sure you were viewing a HTML5 youtube video?

Comment 3

[Loic]

(In reply to Trevonn from comment #2) 
> It only happens in fullscreen. Are you sure you were viewing a HTML5 youtube
> video?

Yes.
Resolution 720p selected in the HTML5 player, stats displayed in fullscreen mode:
http://i.imgur.com/JkOmDcC.jpg

If I switch the resolution to 360p, the number is changed immediately in the stats.

Comment 4

[Trevonn]

Oh my problem is with the dimensions not the resolution that changes fine. I assume your screen resolution is not 1534 x 863?

Comment 5

[Loic]

It's a 1080p screen.

Comment 6

[Trevonn]

Then if you went fullscreen your video dimensions should 1920x1080 not 1534x863 correct?

Comment 7

[:Gijs (he/him)]

(In reply to Trevonn from comment #6)
> Then if you went fullscreen your video dimensions should 1920x1080 not
> 1534x863 correct?

No, that depends on resolution, which isn't necessarily the same as the display's maximum resolution.

This is in essence a dupe of bug 729011.