Avatar for Username

Zoeken in Support

Vermijd ondersteuningsscams. We zullen u nooit vragen een telefoonnummer te bellen, er een sms naar te sturen of persoonlijke gegevens te delen. Meld verdachte activiteit met de optie ‘Misbruik melden’.

Meer info

Deze conversatie is gearchiveerd. Stel een nieuwe vraag als u hulp nodig hebt.

Cannot play mp4 files

  • 5 antwoorden
  • 2 hebben dit probleem
  • 20 weergaven
  • Laatste antwoord van FredMcD

chuck1899
chuck1899
more options

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.

Bewerkt door chuck1899 op

Alle antwoorden (5)

chuck1899
chuck1899 Vraageigenaar
more options

Can anyone help?

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You can check these media prefs on the about:config page:

  • media.windows-media-foundation.enabled
  • media.directshow.enabled
chuck1899
chuck1899 Vraageigenaar
more options

They are both enabled.

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

Bewerkt door chuck1899 op

chuck1899
chuck1899 Vraageigenaar
more options

It's been a month and even with Firefox 40.0.3 it still doesn't work.

Why?

FredMcD
FredMcD
more options

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: