Bug#773121: iceweasel: H.264 playback broken again in Jessie?

[Rene Wagner]

Package: iceweasel
Version: 31.3.0esr-1
Severity: normal

Dear Maintainer,

H.264 support via GStreamer in Iceweasel has been working well for me on a
Wheezy install for quite a while now. I was expecting this to work in Jessie
as well, but have been unsucessful on a fresh Jessie install so far.

My understanding is that gstreamer0.10-ffmpeg has been replaced by
gstreamer1.0-libav in Jessie, so I've installed that instead.
about:config shows that media.gstreamer.enabled is set to true.
Unfortunately, https://www.youtube.com/html5 still insists that H.264 is
not supported by my browser (both in a regular and in a -safe-mode instance).

Am I missing something obvious or is this really a regression in Jessie?
Any help would be appreciated.

Thanks in advance,

Rene

-- Package-specific info:

-- Extensions information
Name: Adblock Plus
Location: /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}
Package: xul-ext-adblock-plus
Status: enabled

Name: Default theme
Location: /usr/lib/iceweasel/browser/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}
Package: iceweasel
Status: enabled

Name: NoScript
Location: ${PROFILE_EXTENSIONS}/{73a6fe31-595d-460b-a920-fcc0f8843232}.xpi
Status: enabled

-- Plugins information
Name: Skype Buttons for Kopete
Location: /usr/lib/mozilla/plugins/skypebuttons.so
Package: kopete
Status: enabled


-- Addons package information
ii  iceweasel      31.3.0esr-1  amd64        Web browser based on Firefox
ii  kopete         4:4.14.1-2   amd64        instant messaging and chat applic
ii  xul-ext-adbloc 2.6.6+dfsg-1 all          advertisement blocking extension 

-- System Information:
Debian Release: 8.0
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages iceweasel depends on:
ii  debianutils               4.4+b1
ii  fontconfig                2.11.0-6.3
ii  libasound2                1.0.28-1
ii  libatk1.0-0               2.14.0-1
ii  libc6                     2.19-13
ii  libcairo2                 1.14.0-2.1
ii  libdbus-1-3               1.8.12-1
ii  libdbus-glib-1-2          0.102-1
ii  libevent-2.0-5            2.0.21-stable-1.1
ii  libffi6                   3.1-2+b2
ii  libfontconfig1            2.11.0-6.3
ii  libfreetype6              2.5.2-2
ii  libgcc1                   1:4.9.1-19
ii  libgdk-pixbuf2.0-0        2.31.1-2+b1
ii  libglib2.0-0              2.42.1-1
ii  libgtk2.0-0               2.24.25-1
ii  libhunspell-1.3-0         1.3.3-3
ii  libnspr4                  2:4.10.7-1
ii  libnss3                   2:3.17.2-1
ii  libpango-1.0-0            1.36.8-3
ii  libsqlite3-0              3.8.7.1-1
ii  libstartup-notification0  0.12-4
ii  libstdc++6                4.9.1-19
ii  libvpx1                   1.3.0-3
ii  libx11-6                  2:1.6.2-3
ii  libxext6                  2:1.3.3-1
ii  libxrender1               1:0.9.8-1+b1
ii  libxt6                    1:1.1.4-1+b1
ii  procps                    2:3.3.9-8
ii  zlib1g                    1:1.2.8.dfsg-2+b1

iceweasel recommends no packages.

Versions of packages iceweasel suggests:
pn  fonts-mathjax          <none>
pn  fonts-oflb-asana-math  <none>
pn  fonts-stix | otf-stix  <none>
ii  libcanberra0           0.30-2.1
pn  libgnomeui-0           <none>
ii  libgssapi-krb5-2       1.12.1+dfsg-15
pn  mozplugger             <none>

-- no debconf information