What is the best/a very good meta-data reader library?

Question

Right now, I\'m particularly interested in reading the data from MP3 files (ID3 tags?), but the more it can do (eg EXIF from images?) the better without compromising the ID3

Answer 1

Further to Anon's answer - exiftool is very powerful and supports a huge range of file types, not just images, but video, audio and numerous document formats.

A Ruby interface for exiftool is available in the form of the mini_exiftool gem

see http://miniexiftool.rubyforge.org/