audioOnlyContainer property
Use this setting only in audio-only outputs. Choose MPEG-2 Transport Stream (M2TS) to create a file in an MPEG2-TS container. Keep the default value Automatic (AUTOMATIC) to create an audio-only file in a raw container. Regardless of the value that you specify here, if this output has video, the service will place the output into an MPEG2-TS container.
Implementation
final HlsAudioOnlyContainer? audioOnlyContainer;