1891327 - https://www.twitch.tv/chess24 goes black regularly on macOS 14.4.1/M1

Status: RESOLVED INCOMPLETE

(Core :: Audio/Video, defect)

Description

[Gian-Carlo Pascutto [:gcp]]

Trying to watch: https://www.twitch.tv/chess24 on an M1 Mac, latest macOS.

(active during late CEST/normal PST hours)
After a few minutes of watching, video goes black. Developer console shows:

Media resource blob:https://www.twitch.tv/98f3c5dc-41dd-47dc-8952-281e66afb0bb could not be decoded. chess24
This error message will be blank when privacy.resistFingerprinting = true.  If it is really necessary, please add it to the whitelist in MediaError::GetMessage: NS_ERROR_DOM_MEDIA_DECODE_ERR (0x806e0004) - void mozilla::AppleVTDecoder::OnDecodeError(OSStatus): OnDecodeError:ffffcd93 player-core-base-ead08a8986f3cc3d0c71.js:1:43566
WEBGL_debug_renderer_info is deprecated in Firefox and will be removed. Please use RENDERER. player-core-base-ead08a8986f3cc3d0c71.js:1:12352

Works fine in Chrome. Marking S2 as using another browser seems to be the only workaround.

Comment 1

[Gian-Carlo Pascutto [:gcp]]

I enabled Media Decoding logging in about:logging, let it log to the Firefox profiler, then reproduced the problem under the profiler: https://share.firefox.dev/4cWXBzN

Comment 2

[Jim Mathies [:jimm]]

Core error message -
MediaError::GetMessage: NS_ERROR_DOM_MEDIA_DECODE_ERR (0x806e0004) - void mozilla::AppleVTDecoder::OnDecodeError(OSStatus): OnDecodeError:ffffcd93 player-core-base-ead08a8986f3cc3d0c71.js:1:43566

Comment 3

[Jim Mathies [:jimm]]

Related - https://github.com/webcompat/web-bugs/issues/126995

Comment 4

[Jeff Muizelaar [:jrmuizel]]

gcp, can you reproduce the problem with any of the saved streams?

Comment 5

[Gian-Carlo Pascutto [:gcp]]

Doesn't look like it.

Comment 6

[Gian-Carlo Pascutto [:gcp]]

I didn't encounter this since, so it might be encoder configuration related. Might have to mark it INCOMPLETE if the attached profile isn't enough to debug.