Dolby_digital_plus

Name	Type	Description
constraints	enum                           broadcast_atsc broadcast_ebu streaming bluray	The target output constraint to use for Dolby Digital encoding.
audio_coding_mode	enum                           3/2 3/2L 3/1 3/1L 3/0 3/0L 2/2 2/1 2/0 1/0	Defines the number of full bandwidth audio channels being encoded.
bitstream_mode	enum                           complete_main music_and_effects visually_impaired hearing_impaired dialogue commentary emergency voice	Type of audio bitstream being processed. 'complete_main' and 'music_and_effects' are main audio services; the rest are associated audio services.
dialnorm	number	Dialogue Level (aka dialogue normalization or dialnorm) is the average dialogue level of a program over time, measured with an LAEq meter, referenced to 0 dBFS. This is the equivalent of loudness_target in DPLC, with a range of -31dB .. -1dB) minimum: -31 maximum: -1
room_type	enum                           not_indicated small large	The room type intended for the decoding.
phase_shift_90_degree	boolean	A 90º phase shift can be applied to the surround channels during encoding. This is useful for generating multichannel bitstreams which, when downmixed, can create a true Dolby Surround compatible output (Lt/Rt). Default setting is true.
dolby_surround_mode	enum                           not_indicated enabled	Indicates to a Dolby Digital decoding product whether the two-channel encoded bitstream requires Pro Logic decoding.
dolby_digital_surround_ex_mode	enum                           not_indicated enabled	This parameter is used to identify the encoded audio as material encoded in Surround EX. This parameter is only used if the encoded audio has two Surround channels.
surround_attenuation_3_db	boolean	–3 dB attenuation can be used to reduce the levels of the surround channels to compensate between the calibration of film dubbing stages and consumer replay environments. The surround channels in film studios are set 3 dB lower than the front channels (unlike consumer applications of 5.1), leading to the level on tape being 3 dB higher. Apply the 3 dB attenuation when using a master mixed in a film room.
dynamic_range_control	object	Dynamic Range Presets allow the user to select the compression characteristic that is applied to the Dolby Digital bitstream during decoding. These compression presets aid playback in less-than-ideal listening environments.
stereo_downmix_preference	object	The settings for the final downmix.

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Example dolby_digital_plus

{
  "uid": "transcode_task",
  "kind": "transcode",
  "payload": {
    "location": {
      "storage_provider": "s3",
      "path": "s3://my_bucket/my_folder"
    },
    "targets": [
      {
        "file_pattern": "{source_basename}_output{default_extension}",
        "existing_files": "replace",
        "container": {
          "kind": "mp4"
        },
        "video": {
          "width": 1280,
          "height": 720,
          "codec": "h264"
        },
        "audio": [
          {
            "codec": "dolby_digital_plus",
            "channels": 2,
            "sample_rate": 48000,
            "dolby_digital_plus": {
              "bitstream_mode": "complete_main",
              "surround_attenuation_3_db": true
            }
          }
        ]
      }
    ]
  }
}