Ogg Vorbis header specifications

Question

I am looking for specifications for the ogg vorbis header packet format. I have searched the Internet without much success. Where can I find one?

Answer 1

• http://en.wikipedia.org/wiki/Ogg#Page_structure describes what every single page in an ogg file looks like -- file metadata and stream data alike.
• http://xiph.org/vorbis/doc/Vorbis_I_spec.html actually describes the contents of a ogg vorbis file's metadata (header) pages. The three header packets are:
  • an Identification Header,
  • a Comment Header, and
  • a Setup Header.

The specification requires that all three of these headers be present.