Ubuntu 14.04 64bit - 'GStreamer ffmpeg video plugin' problem
Solution 1:
Doug McMahon has a launchpad PPA for Ubuntu Multimedia for Trusty here where you can view the packages he has available.
sudo apt-add-repository ppa:mc3man/trusty-media
and
sudo apt-get update
after that do
sudo apt-get install ffmpeg gstreamer0.10-ffmpeg gstreamer0.10-fluendo-mp3 gstreamer0.10-gnonlin gstreamer0.10-plugins-bad-multiverse gstreamer0.10-plugins-bad gstreamer0.10-plugins-ugly totem-plugins-extra gstreamer-tools ubuntu-restricted-extras libxine1-ffmpeg gxine mencoder mpeg2dec vorbis-tools id3v2 mpg321 mpg123 libflac++6 totem-mozilla icedax tagtool easytag id3tool lame nautilus-script-audio-convert libmad0 libjpeg-progs flac faac faad sox ffmpeg2theora libmpeg2-4 uudeview flac libmpeg3-1 mpeg3-utils mpegdemux liba52-0.7.4-dev libquicktime2
Solution 2:
gstreamer0.10-ffmpeg
is not supported on 14.04 at this time. See this page for details and workarounds.