demux/nsv: improve diagnostics related to unknown codec
demux/nsv: improve diagnostics related to unknown codec

It is more helpful to know whether the unsupported codec is video or audio, and
given the seriousness of the matter; an error or is more appropriate than a
warning.

Signed-off-by: Jean-Baptiste Kempf <7b85a41a628204b76aba4326273a3ccc74bd009a@videolan.org>

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc