Media Samples

`sample`

Represents a video, audio or subtitle media sample. Media samples support the following properties:

Property	Type	Description
`duration`	integer	Sample duration expressed in media timescale ticks.
`data`	object	References the sample data.
`properties`	object	Sample specific properties.
`metadata`	array	Lists each type of metadata attached to the sample.
`analysis`	array	Lists each type of analysis performed on the sample.

The following properties are specific to video samples:

Property	Type	Description
`type`	enum	Indicates whether the picture represents an `I`, `P` or `B` frame.
`structure`	enum	Indicates whether the picture is `frame` or a field (`upper`, `lower`, `top` or `bottom`).
`offset`	integer	Composition offset expressed in media timescale ticks.

{
  "audio": [
    {
      "format": "sowt",
      "sample_rate": {
        "numerator": 48000,
        "denominator": 1
      },
      "duration": 6471336,
      "bit_rate": 1536000,
      "language": "eng",
      "channels": 2,
      "label": [
        "L",
        "R"
      ],
      "bits_per_sample": 16,
      "properties": {
        "Mpeg2TransportStreamPid": 102,
        "PrimingSamples": 240
      },
      "extension": [
        {
          "type": "mp2l",
          "language": [
            {
              "language_code": "eng",
              "audio_type": 0
            }
          ],
          "$annotation": {
            "type": "MPEG-2 Language Descriptor (ISO 13818-1)"
          }
        }
      ],
      "sample": [
        {
          "duration": 4800,
          "data": {
            "type": "byte",
            "length": 19200
          },
          "analysis": [
            {
              "type": "loud",
              "momentary_loudness": -18.147150,
              "short_term_loudness": -21.153015,
              "ungated_loudness": -24.851980,
              "level_gated_loudness": -22.105360,
              "speech_gated_loudness": -24.799536,
              "speech_percentage": 93.170006,
              "loudness_range": 6.500000,
              "sample_peak": -9.692958,
              "true_peak": -9.668571,
              "$annotation": {
                "type": "EBU R 128 Audio Loudness"
              }
            }
          ]
        }
      ],
      "$annotation": {
        "format": "PCM, 16-Bit Little-Endian Signed Integer",
        "sample_rate": "48.0 kHz",
        "duration": "134.820 seconds",
        "bit_rate": "1.536 Mbit/s"
      }
    }
  ]
}

`data`

References data within a media container. The data reference describes the location of the data and the method used to retrieve the data.

Property	Type	Description
`type`	string	Four character code that identifies the type of data reference.
`length`	integer	Data length in bytes.
`position`	integer	Data position within the container.

`metadata`

Represents a specific type of metadata attached to a media sample.

Property	Type	Description
`type`	string	Four character code that identifies the metadata.
`data`	object	References the sample metadata.

`analysis`

Represents a specific type of analysis performed on a media sample.

Property	Type	Description
`type`	string	Four character code that identifies the analysis results.