OptionalcustomCustom arbitrary attributes for this track
OptionalcutSidecar timestamp where playback ends, in seconds. When not set, sidecar duration is used.
OptionalcutFirst sidecar timestamp to be played, in seconds.
OptionaldurationDuration of the container in seconds.
OptionalidOptional pre-assigned UUID. When omitted a new UUID is generated automatically.
OptionallabelHuman-readable label for this track.
OptionalloadLoad options used when the track was requested.
OptionalloadTrack load status *
OptionalplayerMain media timestamp when sidecar starts playing, in seconds. When not set, sidecar starts playing at main media start (0).
OptionalrelationsInitial set of inter-track relations.
OptionalsourceData source backing this track.
OptionalsourceThe resolved file format of the source.
OptionalurlURL of the container source. Overridden by source when a UrlSource is provided.
Construction arguments for container track instances.