985917 - [webvtt] Two rows subtitles are not entirely visible when browser is in fullscreen

Status: RESOLVED WONTFIX

(Core :: Audio/Video, defect)

Description

[Petruta Horea [:phorea]]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0
Reproducible on latest Firefox 29 beta 1 (20140318013849). 
Not reproducible on latest Aurora 30.0a2 (20140319004002) where the subtitles size is not modified and latest Nightly 31.0a1 (20140319030201) where the subtitles are missing.

Steps to reproduce:
1. Open the link with the demo video: http://rickeyre.ca/2013/06/20/webvtt-cycle-collector-demo.html while the browser is windowed mode
2. Start the video
3. Maximize the browser to full screen
4. Check the subtitles when displayed in two rows

Actual results:
The subtitles second row is not entirely visible. Please see the screenshot.

Expected results:
The subtitle area should be placed above the controls when the video is played inline (just as they are when video is played full screen)

Notes:
1. Reproducible also on Mac OS X 10.8 and Ubuntu 32-bit.
2. The issue was introduced in Firefox 29 when the feature landed, so it's not a regression. Will continue investigate to see when it was introduced.

Comment 1

[Petruta Horea [:phorea]]

Attachment: vtt subtitle.jpg

Comment 2

[Rick Eyre (:reyre)]

Thanks for catching this Petruta. I thought I landed the patch to fix that in time for FF29, but I guess not.

The easiest way to fix this would be to land Part 8 and 9 of the patches in bug 865407. 1 - 7 made it in to FF29, but 8 and 9 didn't which is causing this.

Comment 3

[Rick Eyre (:reyre)]

I'm closing this since we're not turning the pref on until 31 and it's been fixed there.