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  • 최종 답변자: damsel13

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I have just updated my version of Flash Player to v12.0.0.43. I am also running Firefox 26.0 on Windows 8.1.

Since updating, I have not had any sound on YouTube. Other videos play fine (including those on the Firefox test page) and IE works fine too.

I have searched Google and so far have tried rolling back my Flash player as well as Firefox and none of these have worked. I have also cleared my cache, checked my volume controls (you'd be surprised at how often this is mentioned as a solution!) and the volume is up on YouTube itself.

None of these seem to work.

Any ideas?

Like I said, I have been able to play any other video in a browser and they all work. Just not YouTube. I use YouTube a bit to upload my own videos, so would love to get this working.

I have just updated my version of Flash Player to v12.0.0.43. I am also running Firefox 26.0 on Windows 8.1. Since updating, I have not had any sound on YouTube. Other videos play fine (including those on the Firefox test page) and IE works fine too. I have searched Google and so far have tried rolling back my Flash player as well as Firefox and none of these have worked. I have also cleared my cache, checked my volume controls (you'd be surprised at how often this is mentioned as a solution!) and the volume is up on YouTube itself. None of these seem to work. Any ideas? Like I said, I have been able to play any other video in a browser and they all work. Just not YouTube. I use YouTube a bit to upload my own videos, so would love to get this working.

글쓴이 damsel13 수정일시

선택된 해결법

Hi there, I just thought I'd let you know that I worked it out. It was Java of all things. Thanks a lot for all of your help anyway.

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Note that your system details list doesn't show that the Shockwave Flash plugin is installed and enabled.

Latest Flash player versions here:

If Firefox is using the built-in HTML5 media player then you may be missing the codec to play the media files properly.
You can try to set the media.windows-media-foundation.enabled pref to false on the about:config page.

You can open the about:config page via the location bar.

글쓴이 cor-el 수정일시

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Hi there, Thanks for your reply. I have checked and I definitely have Flash Player installed. I even uninstalled and reinstalled it, just in case. Still nothing.

I also tried the second point you mentioned and that didn't work either. Thanks for your suggestions though.

Is there any way I can add my troubleshooting details again? Just to see if it comes up this time?

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Do you see the Flash plugin in Firefox/Tools > Add-ons > Plugins?

What does it say about the Flash plugin on the about:plugins page?

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Yes, it is there. It's "Always activated"

I've attached an image of the page so you can see everything it says.

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You can check for problems with current Flash plugin versions and try these:

  • disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
  • disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)
  • disable hardware acceleration in the Flash plugin
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선택된 해결법

Hi there, I just thought I'd let you know that I worked it out. It was Java of all things. Thanks a lot for all of your help anyway.