2.2.1.16 v3:AdditionalPayload Element

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A v3:AdditionalPayload element contains video metrics pertaining to the second codec in the channel.<191> The Payload element carries the video metrics pertaining to the first codec in the channel.

If the channel streamed both H.264 and VC-1 video content, then all metrics specific to H.264 are carried in the Payload element and all metrics specific to VC-1 are carried in the v3:AdditionalPayload element. If only H.264 content is streamed, then the metrics are carried in the Payload element and the v3:AdditionalPayload element does not exist in the report. If only VC-1 content is streamed then the metrics are placed in the Payload element and the v3:AdditionalPayload element does not exist in the report.