seekMap:
  isSeekable = true
  duration = 252977
  getPosition(0) = [[timeUs=0, position=0]]
  getPosition(1) = [[timeUs=1, position=0]]
  getPosition(126488) = [[timeUs=126488, position=9099]]
  getPosition(252977) = [[timeUs=252977, position=18386]]
numberOfTracks = 1
track 1900:
  total output bytes = 0
  sample count = 0
  format 0:
    id = 1/1900
    sampleMimeType = audio/ac3
    channelCount = 6
    sampleRate = 48000
tracksEnded = true
