Is audio decoding through gst-libav possible?

[Nikos Chantziaras]

Hello.

I'm using gst-libav (1.4.5). It's working fine for video, but it seems 
it doesn't want to decode audio. For example, if loading an *.mkv file 
in playbin, it refuses to decode any audio. In this case the audio is 
Vorbis encoded. The same thing happens with *.avi files that have 
uncompressed PCM audio. The only way to have sound, is to use the 
gstreamer vorbis or PCM plugin. If they are missing, there's no audio.

Is there a way to have everything handled by gst-libav?

(On a similar note, the same seems to happen with container formats. If 
the mkv gst plugin is missing, gst-libav can't even play mkv files 
anymore, even though it should have built-in mkv support? It would be 
nice to have all that stuff handled by libav so that DLL hell and/or 
buggy gstreamer plugins can be avoided.)