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Youtube HTML5 h.264 and MSE&h.264 disabled

wojciechgorny
wojciechgorny
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Hi,

After upgrading Windows 7 N to Windows 10 Pro N I got red exclamation mark on html5 youtube site (as you can see in the screenshot). HTML5 player is working in some films on youtube and on some FlashPlayer turns on. I tried changing media.mediasource.enabled to true and installed Media Feature Pack for Windows 10 N but it didn't help. I hope you guys know how to solve this problem.

Hi, After upgrading Windows 7 N to Windows 10 Pro N I got red exclamation mark on html5 youtube site (as you can see in the screenshot). HTML5 player is working in some films on youtube and on some FlashPlayer turns on. I tried changing media.mediasource.enabled to true and installed Media Feature Pack for Windows 10 N but it didn't help. I hope you guys know how to solve this problem.

Chosen solution

Did you get the recently updated Media Feature Pack linked in this article: Fix video and audio problems on Firefox for Windows N editions?

If you check these in about:config, do they have their default value?

  • media.mp4.enabled (true)
  • media.wmf.enabled (true)

Note: when I check the current Firefox source code, media.mediasource.ignore_codecs no longer is mentioned, so that preference probably is obsolete (but harmless).

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All Replies (5)

wojciechgorny
wojciechgorny Question owner
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Here are screenshots:

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
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Chosen Solution

Did you get the recently updated Media Feature Pack linked in this article: Fix video and audio problems on Firefox for Windows N editions?

If you check these in about:config, do they have their default value?

  • media.mp4.enabled (true)
  • media.wmf.enabled (true)

Note: when I check the current Firefox source code, media.mediasource.ignore_codecs no longer is mentioned, so that preference probably is obsolete (but harmless).

James
James
  • Top 25 Contributor
  • Moderator
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Just to be certain did you restart Firefox if it was still running when you installed Media Feature Pack. That is if the PC has not been restarted since after you installed Media Feature Pack.

wojciechgorny
wojciechgorny Question owner
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James said

Just to be certain did you restart Firefox if it was still running when you installed Media Feature Pack. That is if the PC has not been restarted since after you installed Media Feature Pack.

Yes, i restarted PC after installation.

wojciechgorny
wojciechgorny Question owner
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jscher2000 said

Did you get the recently updated Media Feature Pack linked in this article: Fix video and audio problems on Firefox for Windows N editions? If you check these in about:config, do they have their default value?
  • media.mp4.enabled (true)
  • media.wmf.enabled (true)
Note: when I check the current Firefox source code, media.mediasource.ignore_codecs no longer is mentioned, so that preference probably is obsolete (but harmless).


After installing Media Feature Pack from your link it works properly, now i have all functions ticked on YouTube HTML5 player site. Thank you very very much!!! :)