To set up an audio-only output in a MediaLive channel, you must verify that the source inputs meet the requirements, then you must set up the audio selectors in the usual way.
Requirements for the channel and audio
sources
The channel can have a single input or multiples inputs. All the output groups (both those that are audio-only and those that are video-and-audio) always ingest the same inputs.
Each source must be one of these categories of source.
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A source that contains only audio. In this case, the source must be one of the following:
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A transport stream in a MediaConnect input
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A transport stream in an RTP input
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Input that contains both audio and video (and optionally captions). In this case, the input can be any input type that MediaLive supports.
Setting up the inputs in the
channel
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Create the inputs in the usual way. Then in the channel, set up the input attachments.
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In each input attachment, create as many audio selectors as you require. For example, create a selector for each language to extract. Or create a selector for each audio quality or codec that is available.
Keep in mind that in a channel with both audio-only and audio-and-video output groups, you don't have to create special audio selectors for the sole use of the audio-only output. The same audio selector can be used by both audio-only and audio-and-video output groups.
