A pure OCaml library to read metadata from various formats. For now, are supported:

• audio formats: ID3v1 and ID3v2 (for mp3), ogg/vorbis, ogg/opus, flac and wav
• image formats: jpeg and png
• video formats: mp4 and avi
• text formats: pdf

Basic usage is

let () =
  let metadata = Metadata.parse_file "test.mp3" in
  List.iter (fun (k,v) -> Printf.printf "- %s: %s\n" k v) metadata

In the above example, the function Metadata.parse_file takes a file name as argument and returns an association list describing its metadata. It consists of pairs of strings being the name of the metadata and its value.

The preferred way is via opam:

opam install metadata

• ocaml-taglib: for tags from audio files (mp3, ogg, etc.)