Comment 6 for bug 991954

Before you open next ticket, please try to install also other packages. The list mentioned above contain only *minimal* dependencies. GStreamer's decodebin2 element tries to dynamically find decoder suitable to file that you try to open. For example that means wavparse plugin for *.wav files, vorbisdec & oggdemux for Ogg/Vorbis and so on.

AFAIK GStreamer has some capabilities for testing for supported codecs, I can consider adding such feature.