http://www.rfc-editor.org/rfc/rfc7845.txt
RFC 7845: Ogg Encapsulation for the Opus Audio Codec, T. Terriberry, R. Lee, R. Giles2016-04-01T23:00:00-00:00This document defines the Ogg encapsulation for the Opus interactive speech and audio codec. This allows data encoded in the Opus format to be stored in an Ogg logical bitstream.