Decode AAC and MP3 mono audio to stereo with Wowza Transcoder

In some streaming scenarios, the source audio stream might switch between stereo and mono. In Wowza Streaming Engine™ media server software, by default Wowza Transcoder assumes that the number of audio channels doesn't change during a transcoding session. You can add a parameter to a transcoder template to instruct the transcoder to force any mono audio frames to stereo by duplicating the mono stream for both the left and right channels.

Note: Wowza Streaming Engine™ 4.5.0.01 or later is required.

To enable this feature in a transcoder template, add the following section to the <Decode> block of the template:

<Audio>
	<Parameters>
		<Parameter>
			<Name>default.scaleChannels</Name>
			<Value>2</Value>
			<Type>Long</Type>
		</Parameter>
	</Parameters>
</Audio>