1721736 - OS-level caption/subtitle settings not passed through to video player

Status: NEW

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

Description

[awumstead]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36

Steps to reproduce:

Customize OS closed caption settings
Open a video that displays unstyled captions (i.e., not styled using :cue) using a VTT track

Actual results:

OS-level closed caption styles (font, color, background, etc.) are not passed through like in Edge, Safari, and Chrome.

Expected results:

OS-level closed caption settings should be passed through.

Comment 1

[Marcela (Please NI request to Brindusa Tot)]

I was able to reproduce this issue on latest Nightly version 92.0a1 (2021-07-22)(64-bit), Beta version 91.0b5, and Firefox Release 90.0.2 on macOS 10.15 using this URL: https://www.iandevlin.com/html5test/webvtt/html5-video-webvtt-sample.html.
I'll attach the evidence on 3 files and I'll change flags accordingly. Severity suggested S3.

Comment 2

[Marcela (Please NI request to Brindusa Tot)]

Attachment: Customize_caption_mac.png

Comment 3

[Marcela (Please NI request to Brindusa Tot)]

Attachment: Caption_Safari.png

Comment 4

[Marcela (Please NI request to Brindusa Tot)]

Attachment: Caption_Nightly.png