Similar to the well-known "file" command, extract can display meta-data from a
 file and print the results to stdout.
 .
 Currently, libextractor supports the following formats: HTML, MAN, PS, DVI,
 OLE2 (DOC, XLS, PPT), OpenOffice (sxw), StarOffice (sdw), FLAC,
 MP3 (ID3v1 and ID3v2), OGG, WAV, S3M (Scream Tracker 3), XM (eXtended Module),
 IT (Impulse Tracker), NSF(E) (NES music), SID (C64 music), EXIV2, JPEG, GIF,
 PNG, TIFF, DEB, RPM, TAR(.GZ), LZH, LHA, RAR, ZIP, CAB, 7-ZIP, AR, MTREE, PAX,
 CPIO, ISO9660, SHAR, RAW, XAR FLV, REAL, RIFF (AVI), MPEG, QT and ASF.
 .
 Also, various additional MIME types are detected. It can also be used to
 compute hash functions (SHA-1, MD5, ripemd160).