Apple TV

<?xml version="1.0"?>
<query>
    <userid>[UserID]</userid> <!-- required-->
    <userkey>[UserKey]</userkey> <!-- required-->
    <action>[Action]</action> <!-- required-->
    <format>
        <output>[appletv|appletv_43]</output>
        <duration_precision>3</duration_precision>
        <stream>
            <!-- Predefined set of streams -->
        </stream>
        <main_source>
            <type>video</type>
        </main_source>
        <alternate_source>
            <type>audio</type>
            <audio_name>audio 1</audio_name>
        </alternate_source>
    </format>
</query>

{
    "query": {
        "userid": "[UserID]",
        "userkey": "[UserKey]",
        "action": "[Action]",
        "format": {
            "output": "[appletv|appletv_43]",
            "duration_precision": "3",
            "stream": "",
            "main_source": {
                "type": "video"
            },
            "alternate_source": {
                "type": "audio",
                "audio_name": "audio 1"
            }
        }
    }
}