Cannot play mp4 files
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.
由chuck1899于修改
所有回复 (5)
Can anyone help?
You can check these media prefs on the about:config page:
- media.windows-media-foundation.enabled
- media.directshow.enabled
They are both enabled.
Refresh Firefox - reset add-ons and settings Refreshing Firefox didn't seem to do anything either.
由chuck1899于修改
It's been a month and even with Firefox 40.0.3 it still doesn't work.
Why?
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: