seekMap:
  isSeekable = true
  duration = 796888
  getPosition(0) = [[timeUs=0, position=0]]
  getPosition(1) = [[timeUs=1, position=0]]
  getPosition(398444) = [[timeUs=398444, position=13385]]
  getPosition(796888) = [[timeUs=796888, position=26959]]
numberOfTracks = 1
track 1900:
  total output bytes = 0
  sample count = 0
  format 0:
    id = 1/1900
    sampleMimeType = audio/ac4
    channelCount = 2
    sampleRate = 48000
tracksEnded = true
