<profile>
  <type>audio</type>
  <id>ff32f7c8-20fe-4e40-b1b0-1aea585c9368</id>
  <priority>2000</priority> <!-- Medium priority. Lower priority than mp3 to
                                 keep mp3 the default. -->
  <description>AAC</description>
  <mimetype>audio/aac</mimetype>
  <extension>m4a</extension>

  <container>
    <type>video/mp4</type>
    <attribute name="variant" type="string" value="iso" />
  </container>

  <audio>
    <type>audio/aac</type>
    <attribute name="mpegversion" type="int" value="4" />

    <property name="bitrate" type="int" min="32000" max="256000" default="128000" />
  </audio>
</profile>
