@type t() :: %HLS.Packager.Track{
  codecs: [String.t()],
  discontinue_next_segment: boolean(),
  duration: float(),
  init_section: nil | %{uri: URI.t(), payload: binary()},
  media_playlist: HLS.Playlist.Media.t(),
  pending_playlist: HLS.Playlist.Media.t(),
  segment_count: non_neg_integer(),
  segment_extension: String.t(),
  stream: HLS.VariantStream.t() | HLS.AlternativeRendition.t(),
  upload_tasks: [
    %{ref: reference(), segment: HLS.Segment.t(), uploaded: boolean()}
  ]
}