vlc dshow:// :dshow-vdev=none :dshow-adev=”virtual-audio-capturer” –sout “#transcode{acodec=mp3,ab=128}:standard{access=http,mux=raw,dst=:8081/go.mp3}”
The trick is to use the raw mux–using ogg results in weird errors http://trac.videolan.org/vlc/ticket/3015#comment:7