Server: Filter non-audio files in libav music_tag implementation.
Server: Filter non-audio files in libav music_tag implementation.

Signed-off-by: Peter Tworek <45f11722e542fe61db2d07ffa14ae9c3e4cb552a@gmail.com>

tworaz/basileus,tworaz/basileus,tworaz/basileus,tworaz/basileus