bandwidth: 400
audio_info {
  codec: "mp4a.40.2"
  sampling_frequency: 44100
  time_scale: 1200
  num_channels: 2
  language: "eng"
}
init_range {
  begin: 0
  end: 120
}
index_range {
  begin: 121
  end: 221
}
reference_time_scale: 50
container_type: 1
media_file_name: "test_output_file_name_audio_eng1.mp4"
media_duration_seconds: 10.5