seekMap:
  isSeekable = true
  duration = 760000
  getPosition(0) = [[timeUs=0, position=685]]
  getPosition(1) = [[timeUs=0, position=685]]
  getPosition(380000) = [[timeUs=0, position=685]]
  getPosition(760000) = [[timeUs=0, position=685]]
numberOfTracks = 1
track 0:
  total output bytes = 393
  sample count = 1
  format 0:
    id = 1
    sampleMimeType = audio/ac4
    channelCount = 2
    sampleRate = 48000
    language = und
  sample 0:
    time = 720000
    flags = 1
    data = length 393, hash 8506A1B
tracksEnded = true
