On Sun, 26 April 2015, at 3:49 pm, Alan Mackenzie <a...@muc.de> wrote:
> The following USE flags were used in my building of firefox 31.6.0:
>
> USE="bindist dbus jit minimal startup-notification -custom-cflags
> -custom-optimization -debug -gstreamer -hardened (-pgo) -pulseaudio
> (-selinux) -system-cairo -system-icu -system-jpeg -system-libvpx
> -system-sqlite {-test} -wifi"
`euses system-libvpx` says "use the system-wide media-libs/libvpx" and if we
look up media-libs/libvpx then its description explains that its about the WebM
VP8 codec. It would be better if it explained that this is a _video_ codec, but
Gentoo's USE flag and package descriptions have always been rubbish.
I would perhaps try rebuilding with USE=system-libvpx and checking the
https://www.youtube.com/html5 page again.
Personally, I would probably also try a later version of Firefox.
I appreciate that 31.x is the latest stable version, but I doubt newer versions
are actually unstable in any way, and if I google "youtube html5 firefox" I
find that "Google will enforce the use of HTML5 video on YouTube for all
Firefox users who use Firefox 33 or newer", "FYI: Firefox 35 uses the HTML5
video player in Youtube by default" and "Firefox 37 Released With Native HTML5
YouTube Playback"
Stroller.
