Module mp4ameta::atom

Contains constants, structs and functions for working with MPEG-4 metadata atoms.

Structs

Atom	A struct that represents a MPEG-4 audio metadata atom.
AtomData	A struct representing data that is associated with an Atom identifier.
AtomT	A template representing a MPEG-4 audio metadata atom.
FILETYPE_ATOM_T	Lazily initialized static reference to a ftyp atom template.
ITEM_LIST_ATOM_T	Lazily initialized static reference to an atom hierarchy template leading to an empty ilst atom.
Ident	A 4 byte atom identifier.
METADATA_ATOM_T	Lazily initialized static reference to an atom metadata hierarchy template needed to parse metadata.

Constants

ADVISORY_RATING	(rtng)
ALBUM	(©alb)
ALBUM_ARTIST	(aART)
ARTIST	(©ART)
ARTWORK	(covr)
BPM	(tmpo)
CATEGORY	(catg)
COMMENT	(©cmt)
COMPILATION	(cpil)
COMPOSER	(©wrt)
COPYRIGHT	(cprt)
CUSTOM_GENRE	(©gen)
DATA	(data) Identifier of an atom containing typed data.
DESCRIPTION	(desc)
DISC_NUMBER	(disk)
ENCODER	(©too)
FILETYPE	(ftyp) Identifier of an atom information about the filetype.
GAPLESS_PLAYBACK	(pgap)
GROUPING	(©grp)
ITEM_LIST	(ilst) Identifier of an atom containing a list of metadata atoms.
KEYWORD	(keyw)
LYRICS	(©lyr)
MEDIA	(mdia) Identifier of an atom containing information about a tracks media type and data.
MEDIA_HEADER	(mdhd) Identifier of an atom specifying the characteristics of a media atom.
MEDIA_TYPE	(stik)
METADATA	(meta) Identifier of an atom containing a metadata item list.
MOVEMENT	(©mvn)
MOVEMENT_COUNT	(©mvc)
MOVEMENT_INDEX	(©mvi)
MOVIE	(moov) Identifier of an atom containing a structure of children storing metadata.
PODCAST	(pcst)
PODCAST_EPISODE_GLOBAL_UNIQUE_ID	(egid)
PODCAST_URL	(purl)
PURCHASE_DATE	(purd)
SHOW_MOVEMENT	(shwm)
STANDARD_GENRE	(gnre)
TITLE	(©nam)
TRACK	(trak) Identifier of an atom containing information about a single track.
TRACK_NUMBER	(trkn)
TV_EPISODE	(tves)
TV_EPISODE_NUMBER	(tven)
TV_NETWORK_NAME	(tvnn)
TV_SEASON	(tvsn)
TV_SHOW_NAME	(tvsh)
USER_DATA	(udta) Identifier of an atom containing user metadata.
VALID_FILETYPES	A lowercase list of valid file types defined by the ftyp atom.
WORK	(©wrk)
YEAR	(©day)

Functions

dump_tag_to	Attempts to dump the metadata atoms to the writer. This doesn't include a complete MPEG-4 container hierarchy and won't result in a usable file.
parse_atoms	Attempts to parse the list of atoms, matching the templates, from the reader.
parse_head	Attempts to parse the atom's head containing a 32 bit unsigned integer determining the size of the atom in bytes and the following 4 byte identifier from the reader.
read_tag_from	Attempts to read MPEG-4 audio metadata from the reader.
write_tag_to	Attempts to write the metadata atoms to the file inside the item list atom.