Clementine won't play .wma, with "Your GStreamer installation is missing a plugin" error

14.04 and later

I've checked the clementine 1.2.x dependencies and I can confirm it requires the gstreamer 0.10 plugins and since wma support is provided by the ffmpeg plugin you need to set up the following PPA to enable WMA support for 14.04 and later:

sudo add-apt-repository ppa:mc3man/gstffmpeg-keep
sudo apt-get update
sudo apt-get install gstreamer0.10-ffmpeg

By the way, in my Ubuntu 14.04 (upgraded from 13.10) it seems that there is no apt-add-repository

sudo apt-get install software-properties-common

Now yes, you can install gstreamer0.10-ffmpeg as #1 said:

sudo apt-add-repository ppa:mc3man/trusty-media
sudo apt-get update
sudo apt-get install gstreamer0.10-ffmpeg

I was getting this error on 14.04 LTS when trying to stream any internet source. This is what resolved the error for me:

sudo apt-get install gstreamer1.0-libav