為了改善您的使用體驗，本網站正在進行維護，部分功能暫時無法使用。若本站的文件無法解決您的問題，想要向社群發問的話，請到 Twitter 上的 @FirefoxSupport 或 Reddit 上的 /r/firefox 發問，我們的社群成員將很快會回覆您的疑問。

Avatar for Username

搜尋 Mozilla 技術支援網站

防止技術支援詐騙。我們絕對不會要求您撥打電話或發送簡訊，或是提供個人資訊。請用「回報濫用」功能回報可疑的行為。

了解更多

此討論串已被封存。 如果您有需要幫助，請新增一個新問題

html5 video not playing

  • 2 回覆
  • 5 有這個問題
  • 1 次檢視
  • 最近回覆由 petef

petef
petef
more options

Since updating to v.42.0.2 from v.40 I found Fx Android will not play HTML5 video. After deleting v.42, and installing totally new v.43 with no addons, still HTML5 video will not play, just get sound with intermittent video and spinning wheel.

This has been more or less the case since v.36, but until now I have got around the problem by altering about:config - changing 'media.fragmented-mp4.enabled' to FALSE, then Fx worked for at least some video, but this workaround does not appear to work with v.42 & v.43 (and maybe v.41 as I skipped straight from v.40 to 42.0.2). Now when implementing the workaround, I get "no video with supported format and MIME type found", and "Your browser does not currently recognise any of the video formats available".

With the workaround in place, https://html5test.com/ reports that HTML5 Codecs supported are: Ogg Theora, WebM with VP8 & VP9. Not supported: MPEG-4 ASP & H264, so it seems the workaround disables H264 functionality, but at least other HTML5 video worked before v.42.

My other browser plays all video without any issues, but it is important that I use Fx (or Chrome) due to the vulnerabilities in pre-KitKat Webview (using Android 4.2.2 & no chance of an upgrade from OEM).

I guess the problem goes back to v.36, and was never resolved then, just fudged with a workaround that no longer works.

Any ideas anyone?

Since updating to v.42.0.2 from v.40 I found Fx Android will not play HTML5 video. After deleting v.42, and installing totally new v.43 with no addons, still HTML5 video will not play, just get sound with intermittent video and spinning wheel. This has been more or less the case since v.36, but until now I have got around the problem by altering about:config - changing 'media.fragmented-mp4.enabled' to FALSE, then Fx worked for at least some video, but this workaround does not appear to work with v.42 & v.43 (and maybe v.41 as I skipped straight from v.40 to 42.0.2). Now when implementing the workaround, I get "no video with supported format and MIME type found", and "Your browser does not currently recognise any of the video formats available". With the workaround in place, https://html5test.com/ reports that HTML5 Codecs supported are: Ogg Theora, WebM with VP8 & VP9. Not supported: MPEG-4 ASP & H264, so it seems the workaround disables H264 functionality, but at least other HTML5 video worked before v.42. My other browser plays all video without any issues, but it is important that I use Fx (or Chrome) due to the vulnerabilities in pre-KitKat Webview (using Android 4.2.2 & no chance of an upgrade from OEM). I guess the problem goes back to v.36, and was never resolved then, just fudged with a workaround that no longer works. Any ideas anyone?

所有回覆 (2)

SHOBLE THOMAS
SHOBLE THOMAS
more options

https://hacks.mozilla.org/2012/11/h264-video-in-firefox-for-android/

petef
petef 提出問題者
more options

Thanks for your reply, unfortunately this does appear to be the issue.

In v.40 and in v.43: With 'media.fragmented-mp4.enabled' set to TRUE in about:config (default), https://html5test.com/ reports that there is H264 support, but attempting to play a Youtube video, all I get is sound plus broken-up video with the spinning wheel.

In v.40 (and before), I can get Youtube video to play by setting 'media.fragmented-mp4.enabled' to FALSE This appears to disable H264 support, (as reported by https://html5test.com/), but must be allowing video to play in another format as Youtube video plays fine.

In v.43, trying to play the same Youtube video with 'media.fragmented-mp4.enabled' set to FALSE, all I get is the message "No video with supported format and MIME type found". So currently cannot play Youtube video in v.43.