Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.
Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
demuxed with new API is automatically converted to the old API,
allowing old applications to stay functional.
Originally committed as revision 16499 to svn://svn.ffmpeg.org/ffmpeg/trunk
metadata using old API, it is automatically converted to new API before
muxing.
Originally committed as revision 16447 to svn://svn.ffmpeg.org/ffmpeg/trunk