mediaextract (extract media files that are embedded in other files)

mediaextract extracts known media types such as RIFF, Ogg, etc, from
various 'resource' or 'archive' format files. It works by looking for
'magic' byte sequences (like the file(1) command does). A typical use
case would be extracting resources from a game. mediaextract does not
support compression (zip/rar/7z/etc), so uncompress the file first,
if necessary.
