Specs

t() :: %Membrane.HTTPAdaptiveStream.Manifest.Track.Config{
  content_type: :audio | :video,
  header_extension: String.t(),
  id: Membrane.HTTPAdaptiveStream.Manifest.Track.id_t(),
  persist?: boolean(),
  segment_extension: String.t(),
  target_segment_duration: Membrane.Time.t() | Ratio.t(),
  target_window_duration: Membrane.Time.t() | Ratio.t()
}

Track configuration consists of the following fields:

• id - identifies the track, will be serialized and attached to names of manifests, headers and segments
• content_type - either audio or video
• header_extension - extension of the header file (for example .mp4 for CMAF)
• segment_extension - extension of the segment files (for example .m4s for CMAF)
• target_segment_duration - expected duration of each segment
• target_window_duration - track manifest duration is keept above that time, while the oldest segments

        are removed whenever possible

• persist? - determines whether the entire track contents should be available after the streaming finishes