Audio.maxduration

The longest audio ad the slot accepts, in seconds. Recommended, and since 2.6 mutually exclusive with Audio.rqddurs.

CurrentintegerRecommendedSince 2.4

Field facts

Bidders drop creatives longer than this before pricing. In a pod it limits each spot, while Audio.poddur limits the whole break.

Where the field sits in a payload, with everything else left out:

{
  "id": "req-1",
  "imp": [
    {
      "audio": {
        "maxduration": 30
      }
    }
  ]
}

Sending it together with Audio.rqddurs, reported as openrtb.fields.mutually_exclusive.
Setting it below Audio.minduration, which leaves no length that fits.

Added in OpenRTB 2.4, and present in the latest snapshot. The table shows how each version's spec text types the field.

Versions	Type in the spec	Required	Deprecated
2.4	integer	Recommended	No
2.5 to 2.6-202606	integer	Recommended	No

For a walkthrough of the whole object, read Audio object guide.