DolbyVisionCompatibility
When you set Compatibility mapping to Duplicate Stream, DolbyVision streams that have a backward compatible base layer (e.g., DolbyVision 8.1) will cause a duplicate stream to be signaled in the manifest as a duplicate stream. When you set Compatibility mapping to Supplemntal Codecs, DolbyVision streams that have a backward compatible base layer (e.g., DolbyVision 8.1) will cause the associate stream in the manifest to include a SUPPLEMENTAL_CODECS property.