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Cannot play mp4 files

  • 5 përgjigje
  • 2 e kanë hasur këtë problem
  • 20 parje
  • Përgjigjja më e re nga FredMcD

chuck1899
chuck1899
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On Windows Vista, firefox 38.0.5 cannot play mp4 files. Both MPC-HC and Windows Media Player can play mp4 files. I have ffdshow installed.

These are enabled: 

   media.windows-media-foundation.enabled
   media.directshow.enabled

Results from https://www.youtube.com/html5 show:

Disabled: H.264, MSE & H.264, MSE & WebM VP9

Enabled: HTMLVideoElement, Media Source Extensions, WebM VP8

Youtube videos are also locked at 360p using the html5 player.

OGG / WebM files play fine.

On Windows Vista, firefox 38.0.5 cannot play mp4 files. Both MPC-HC and Windows Media Player can play mp4 files. I have ffdshow installed. These are enabled: media.windows-media-foundation.enabled media.directshow.enabled Results from https://www.youtube.com/html5 show: Disabled: H.264, MSE & H.264, MSE & WebM VP9 Enabled: HTMLVideoElement, Media Source Extensions, WebM VP8 Youtube videos are also locked at 360p using the html5 player. OGG / WebM files play fine.

Ndryshuar nga chuck1899

Krejt Përgjigjet (5)

chuck1899
chuck1899 I zoti i pyetjes
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Can anyone help?

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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You can check these media prefs on the about:config page:

  • media.windows-media-foundation.enabled
  • media.directshow.enabled
chuck1899
chuck1899 I zoti i pyetjes
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They are both enabled.

Refresh Firefox - reset add-ons and settings Refreshing Firefox didn't seem to do anything either.

Ndryshuar nga chuck1899

chuck1899
chuck1899 I zoti i pyetjes
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It's been a month and even with Firefox 40.0.3 it still doesn't work.

Why?

FredMcD
FredMcD
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Sometimes, messages get lost from inactivity. Sorry.

check this:

  • see if there are updates for your graphics drive drivers

https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

  • disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)

https://forums.adobe.com/message/4468493#TemporaryWorkaround

  • disable hardware acceleration in the Flash plugin

https://forums.adobe.com/thread/891337 See also: