Enable the MP4A-LATM media type for AAC audio

Wowza Streaming Engine can use the mpeg4-generic or mp4a-latm (3gpp) packetization method to output AAC audio. The default packetization method is mpeg4-generic.

1. Click the Applications tab and then select your live application in the contents panel.
    
2. On the live application page Properties tab, click Custom in the Quick Links bar or scroll to the bottom of the page.
3. In the Custom area, click Edit.
    
4. Click Add Custom Property, specify the following settings in the Add Custom Property dialog box, and then click Add:
    
   • Path – Select /Root/Application/RTP.
      
   • Name – Enter audioPacketizerAAC.
      
   • Type – Select String.
      
   • Value – Enter com.wowza.wms.rtp.packetizer.RTPPacketizerMPEG4LATM.
5. Click Save, and then restart the live application to apply the changes. 

The property is added to the application's Application.xml file within the <RTP>/<Properties> container element as in the following example:

<Property>
   <Name>audioPacketizerAAC</Name>
   <Type>String</Type>
   <Value>com.wowza.wms.rtp.packetizer.RTPPacketizerMPEG4LATM</Value>
</Property>