Since now mpeg2 licenses are available,
 a custom libav is not necessary anymore for transcoding.
 I leave the patch here, if some one wants to pick up the idea again.
 
 Marten

== Not necessary anymore ==
vompclient on Raspberry PI needs its own patched libav.
Please use the skript fetch_libav.sh to download the libav from and
to apply our custom libav patches and to run the configure command.