How enrichment works

When contextual metadata enrichment is enabled, MediaLive monitors incoming SCTE-35 messages for cue-out markers. These include a splice_insert with out_of_network_indicator = 1, or a time_signal with a cue-out segmentation_descriptor. When MediaLive detects a cue-out marker, it appends an additional segmentation_descriptor to the descriptor loop. This descriptor uses the format_identifier value "AWSE" in its MPU UPID. It carries the Elemental Inference query parameters that downstream systems need.

MediaLive passes existing descriptors in the original SCTE-35 message through unchanged. MediaLive does not modify non-cue-out messages (such as cue-ins and splice_null).

For the full binary format specification, see AWSE SCTE-35 format.