1849486 - Current Firefox from trunk can't play H.264 videos at all

Status: RESOLVED DUPLICATE of bug 1849396

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

Description

[Sergey Sobolev]

Steps to reproduce:

env:
Windows x64 10.0.25931.1000
Mozilla Firefox 118.0a1 (2023-08-19) (64-bit) (clean profile)

Starting Mozilla Firefox 118.0a1 (2023-08-19) (64-bit) with clean profile. Open H.264 test page https://tools.woolyss.com/html5-audio-video-tester/?u=woolyss.com/f/Big_Buck_Bunny_Trailer.m4v or https://tools.woolyss.com/html5-audio-video-tester/?u=video.dailymail.co.uk/video/1418450360/2015/02/1418450360_4056782948001_nerdist--1424015378606.mp4 .

Actual results:

Black screen or stuck on play.

Expected results:

Video opens like in Firefox 117b9.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.