seekMap:
  isSeekable = true
  duration = 960000
  getPosition(0) = [[timeUs=0, position=0]]
  getPosition(1) = [[timeUs=1, position=0]]
  getPosition(480000) = [[timeUs=480000, position=21958]]
  getPosition(960000) = [[timeUs=960000, position=44104]]
numberOfTracks = 1
track 256:
  total output bytes = 0
  sample count = 0
  format 0:
    id = 1/256
    sampleMimeType = video/mp4v-es
    width = 640
    height = 360
    initializationData:
      data = length 47, hash 7696BF67
tracksEnded = true
