-n: dirs with special chars not possible

I am working on a German Windows 2000 and use the oggenc2.exe in this version:

OggEnc v2.83 (Lancer [20061110](SSE) based on aoTuV b5)
(c) 2000-2006 Michael Smith <msmith@xiph.org>
 & portions by John Edwards <john.edwards33@ntlworld.com>

When employing the argument -n like -n%a/%l/%t.ogg you have to pay attention on the fact, that in directory names for example umlauts are not allowed. That is not a missing feature, it’s a bug: The directory is created with the special character encoded wrongly, OggEnc after that doesn’t find its selfmade directory and crashes.

For instance:

oggenc2 -tBrandung -lBildfänger -a"Tut das Not" -GPunk -n%a/%l/%t.ogg brandung.wav

This call leads to a creation of a directory Tut das Not and a subdir BildfÃ¤nger (take note of the Ã¤ instead of an ä) and the program quits with this message:

ERROR: Cannot open output file "Tut das Not/Bildf├ñnger/Brandung.ogg": No such file or directory

When I correct the name of the subdirectory manually, a further programm call works as expected.