OGGVorbisComments

OGGVorbisComments, commonly referred to as Vorbis comments, are the metadata tags used in Ogg Vorbis audio files to store information about the audio content. The format is defined as a simple, text-based key-value tagging system implemented within the Ogg Vorbis stream. It is widely supported by players, editors, and libraries that handle Ogg Vorbis or related codecs.

The Vorbis comment header begins with a vendor string that identifies the encoder, followed by a count of user comments. Each user comment is stored as a text string in the form KEY=VALUE. Keys are typically ASCII, while values are UTF-8 text. A single file may contain multiple comments with the same key to represent multiple values (for example, multiple ARTIST entries). There is no fixed schema, but common keys include TITLE, ARTIST, ALBUM, TRACKNUMBER, DATE, GENRE, and COMMENT.

Software toolchains commonly read and write OGG VorbisComments via libraries such as libvorbis, TagLib, Mutagen, and FFmpeg, and are supported by major media players. Because the format is flexible and untyped, different applications may expose varying sets of fields. Vorbis comments do not define a standard field for embedded artwork; cover art, when present, is typically handled by external means or by application-specific extensions rather than a universal tag name in the Vorbis Comment block.

OGGVorbisComments represent the de facto tagging system for Ogg Vorbis files, providing a simple, extensible way to attach metadata to audio without a fixed, rigid schema. They are distinct from metadata formats used in other containers, such as ID3 for MP3 files.