Open Bug 2058462 Opened 17 days ago Updated 15 days ago

2ch.org - "No video in the supported format or MIME type was found." error message displayed

Categories

(Web Compatibility :: Site Reports, defect, P3)

Product:
Web Compatibility
Component:
Site Reports
Platform:
Desktop
Windows 10
Type:
defect

Tracking

(Webcompat Priority:P3, Webcompat Score:4)

Project Flags:
Webcompat Priority P3
Webcompat Score 4

People

(Reporter: rbucata, Unassigned)

References

(Depends on 1 open bug,
URL
)

Details

(Keywords: webcompat:platform-bug, webcompat:site-report, Whiteboard: [webcompat-source:web-bugs][autowebcompat:processed][autowebcompat:repro-success])

User Story

autowebcompat-repro-status:success
autowebcompat-repro-chrome-mask-fixed:false
autowebcompat-repro-channels:nightly,stable,esr
platform:windows
impact:content-missing
configuration:common
affects:all
branch:release
diagnosis-team:media
user-impact-score:52.5

Attachments

(3 files)

Chr vs ff
222.34 KB, video/mp4
Details
Reproduction steps generated by autowebcompat bot
538 bytes, text/markdown
Details
Screenshot generated by autowebcompat bot
13.49 KB, image/png
Details

Environment:
Operating system: Windows 10
Firefox version: Firefox 140.0

Steps to reproduce:

  1. Navigate to: https://2ch.org/v/src/10457296/17851626051090905941.mp4
  2. Observe

Expected Behavior:
Video can be played

Actual Behavior:
Error message displayed

Notes:

  • Reproduces regardless of the status of ETP
  • Reproduces in firefox-nightly, and firefox-release
  • Does not reproduce in chrome

Created from https://github.com/webcompat/web-bugs/issues/229814

Attached video Chr vs ff —
Whiteboard: [webcompat-source:web-bugs] → [webcompat-source:web-bugs][autowebcompat:processed]
User Story: (updated)
Whiteboard: [webcompat-source:web-bugs][autowebcompat:processed] → [webcompat-source:web-bugs][autowebcompat:processed][autowebcompat:repro-success]

This is a genuine Firefox web-compat issue. Navigating directly to the MP4 URL https://2ch.org/v/src/10457296/17851626051090905941.mp4 in Firefox displays the error "No video in the supported format or MIME type was found." The video element reports error code 4 with message NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006), networkState 3, readyState 0 — the video fails to load/play. The server serves the resource with Content-Type video/mp4. In Chrome the exact same URL plays correctly (readyState 4, duration ~24.7s, not paused), so the breakage is Firefox-specific and prevents the user from viewing the video content.

Video plays fine on macOS, and the video is HEVC. This is bug 1963910.

Severity: -- → S4
User Story: (updated)
Webcompat Priority: --- → P3
Webcompat Score: --- → 4
Depends on: hevc-windows-support
Keywords: webcompat:platform-bug
Priority: -- → P3
User Story: (updated)

In about:support written "hevc not supported", but I installed hevc and codec's

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