Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

搜索 | 用户支持

防范以用户支持为名的诈骗。我们绝对不会要求您拨打电话或发送短信,及提供任何个人信息。请使用“举报滥用”选项报告涉及违规的行为。

Learn More

Firefox video stream problems in youtube and twich unsupported MP4/H.264 while having installed media feature pack

  • 7 个回答
  • 0 人有此问题
  • 1 次查看
  • 最后回复者为 hello_there

more options

So I have a following problem

FF 124.0.1 Windows 10 N edition Installed media feature pack

When trying to play twitch video it shows error 4000 and when trying to play stream from youtube it shows that your browser can't play this video.

Problem is that FF was able to do it like 6 moths-year ago (not really watching stream videos)

was trying to reinstal media feature pack, firefox, chcecknig nighgtly build but without sucess and have no clue what can do more

So I have a following problem FF 124.0.1 Windows 10 N edition Installed media feature pack When trying to play twitch video it shows error 4000 and when trying to play stream from youtube it shows that your browser can't play this video. Problem is that FF was able to do it like 6 moths-year ago (not really watching stream videos) was trying to reinstal media feature pack, firefox, chcecknig nighgtly build but without sucess and have no clue what can do more

被采纳的解决方案

Ok I manage to solve it sfc show two corrupted dll files What I did in the end was as follow:

sfc /scannow DISM /Online /Cleanup-image /StartComponentCleanup DISM /Online /Cleanup-image /RestoreHealth reboot sfc /scannow uninstalled media feature pack reboot sfc /scannow reboot sfc /scannow installed media feature pack reboot

and it works

定位到答案原位置 👍 0

所有回复 (7)

more options

Laptop, Desktop, or DIY? If not DIY, what make and model? What graphics card and driver version? Did you ever check in Windows update under the optional update section?

有帮助吗?

more options

Have you tried Firefox in Troubleshoot Mode?

有帮助吗?

more options

Desktop, DIY

GPU RX6400 driver version [23.20.17.03-231016a-398307C-AIB] AMD driver version for windows [31.0.22017.3004]

Windows 10 professiona N 64 bit 22H2

I have tired Firefox in troubleshoot mode I have checked update under optional updates, there is none and everything is up to date

有帮助吗?

more options

You can check the codec support in the "Help -> More Troubleshooting Information" (about:support) page, you may have to play a video to initialize this section.

有帮助吗?

more options

Under HEVC and AAC I have "not supported" on both sides

H264 is "supported" on both sides

有帮助吗?

more options

Does youtube work with the h264ify extension installed?

Try installing or updating the "VP9 Video Extensions" and "AV1 Video Extension" from the Microsoft Store then reboot.

Try running the System File Checker tool:

sfc /scannow

有帮助吗?

more options

选择的解决方案

Ok I manage to solve it sfc show two corrupted dll files What I did in the end was as follow:

sfc /scannow DISM /Online /Cleanup-image /StartComponentCleanup DISM /Online /Cleanup-image /RestoreHealth reboot sfc /scannow uninstalled media feature pack reboot sfc /scannow reboot sfc /scannow installed media feature pack reboot

and it works

由hello_there于修改

有帮助吗?

我要提问

您需要登录才能回复。如果您还没账号,可以提出新问题