This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Wo archive tread sia. Meɖekuku bia biabia yeye ne ehia kpeɖeŋu.

MP4 videos fail to play

  • 8 ŋuɖoɖowo
  • 1 masɔmasɔ sia le esi
  • 3 views
  • Nuɖoɖo mlɔetɔ sprain5494

sprain5494
sprain5494
more options

MP4 videos fail to play with the following error messages:

  1. No video with supported format and MIME type found.
  2. Video can't be played because the file is corrupt.
  3. NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005)
  4. Error no decoder found for audio/mp4a-latm

example video #1 on https://tekeye.uk/html/html5-video-test-page

other notes:

  • issue began a 1-2 weeks ago
  • issue does not exist on chrome browser
  • MP4 videos can be downloaded and played successfully in applications other than firefox
  • other video formats play successfully in firefox
  • issue persists in troubleshoot mode
  • issue persists with hardware acceleration on/off
  • issue persists with tracking protection on/off
  • media.mp4.enabled is set to true
MP4 videos fail to play with the following error messages: # No video with supported format and MIME type found. # Video can't be played because the file is corrupt. # NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005) # Error no decoder found for audio/mp4a-latm example video #1 on [https://tekeye.uk/html/html5-video-test-page https://tekeye.uk/html/html5-video-test-page] other notes: * issue began a 1-2 weeks ago * issue does not exist on chrome browser * MP4 videos can be downloaded and played successfully in applications other than firefox * other video formats play successfully in firefox * issue persists in troubleshoot mode * issue persists with hardware acceleration on/off * issue persists with tracking protection on/off * media.mp4.enabled is set to true

All Replies (8)

jonzn4SUSE
jonzn4SUSE
  • Top 10 Contributor
more options

It works for me. see screenshot Desktop or laptop Manufacture and Model?


Edition Windows 11 Pro Insider Preview Version 22H2 Installed on ‎30-‎Sep-‎22 OS build 25211.1010 Experience Windows Feature Experience Pack 1000.25211.1010.0

sprain5494
sprain5494 Biabia la
more options

jonzn4SUSE said
Desktop or laptop

desktop


jonzn4SUSE said
Manufacture and Model?

i built

sprain5494
sprain5494 Biabia la
more options

issue persists with new profile

sprain5494 trɔe

sprain5494
sprain5494 Biabia la
more options

more notes:

  1. issue exists in 105.0
  2. video plays in 104.0.2, but not audio

sprain5494 trɔe

jonzn4SUSE
jonzn4SUSE
  • Top 10 Contributor
more options

Can you update to the current version and see what happens? It works for me in Win7. see screenshot

jonzn4SUSE
jonzn4SUSE
  • Top 10 Contributor
more options

Did you test in Safe Mode?

sprain5494
sprain5494 Biabia la
more options

jonzn4SUSE said
Can you update to the current version and see what happens?

issue persists in 106.0.1

sprain5494
sprain5494 Biabia la
more options

jonzn4SUSE said
Did you test in Safe Mode?

issue persists in safe mode