There are a few values that can be added for completeness.
<AdaptationSet mimeType="video/mp4" segmentAlignment="true" startWithSAP="1" bitstreamSwitching="false" subsegmentAlignment="true" subsegmentStartsWithSAP="1">
<SegmentTemplate timescale="90000" duration="180180" startNumber="1"/>
Duration. *string `xml:"duration,attr"`
<SegmentTemplate timescale="44100" media="aac_$Number%09d$.mp4" initialization="aacinit.mp4" duration="88288" startNumber="1"/>
AudioChannelConfiguration *AudioChannelConfiguration `xml:"AudioChannelConfiguration,omitempty"`
type AudioChannelConfiguration struct {
SchemeIDURI *string `xml:"schemeIdUri,attr"`
Value *string `xml:"value,attr,omitempty"`
}
<Representation id="6" bandwidth="192000" audioSamplingRate="48000" codecs="ec-3">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:mpegB:cicp:ChannelConfiguration" value="6"/>
</Representation>