Configuring a job for pre-mixed audio descriptions - MediaConvert
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Configuring a job for pre-mixed audio descriptions

If you have an input that already has pre-mixed audio descriptions, and does not contain an audio description audio signal or an audio description data stream, set Audio description broadcaster mix to Broadcaster mixed AD.

When you do, MediaConvert writes metadata in your output that signals to downstream systems that it contains broadcaster mixed audio descriptions.

The following describes how to configure your job settings to write metadata in your output signalling it contains pre-mixed audio descriptions.

To write broadcaster mixed audio description metadata in your output by using the MediaConvert console:

  1. Open the Create job page in the MediaConvert console.

  2. Add an input that has pre-mixed audio description.

  3. Add an output with at least one audio track.

  4. In the output audio track, set Audio description broadcaster mix to Broadcaster mixed AD.

  5. (Optional) If you enable Manual audio remixing, keep Audio description audio channel and Audio description data channel blank, as these channels will not be present in your input.

The following is an excerpt of a job settings JSON that specifies pre-mixed audio descriptions for a stereo output:

{ "Settings": { "Inputs": [], "OutputGroups": [ { "Name": "File Group", "OutputGroupSettings": { "Type": "FILE_GROUP_SETTINGS", "FileGroupSettings": {} }, "Outputs": [ { "VideoDescription": {}, "AudioDescriptions": [ { "CodecSettings": { "Codec": "AAC", "AacSettings": { "Bitrate": 96000, "CodingMode": "CODING_MODE_2_0", "SampleRate": 48000, "AudioDescriptionBroadcasterMix": "BROADCASTER_MIXED_AD" } } } ], "ContainerSettings": { "Container": "MP4", "Mp4Settings": {} } } ] } ] } }