The bitrate of the audio in bits per second. Default to 128000.
128000
The number of audio channels. Default to 2.
2
Specifies the label for the codec. The label can be used to control muxing behavior.
The encoding profile to be used when encoding audio with AAC. Possible values are AacLc, HeAacV1,and HeAacV2. Default to AacLc.
AacLc
HeAacV1
HeAacV2
The sampling rate to use for encoding in Hertz. Default to 48000.
48000