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AWS Elemental MediaLive
User Guide

How SCTE-35 Events Are Handled in Manifests and Sparse Tracks

When manifest decoration or sparse track is enabled, AWS Elemental MediaLive inserts up to three types of information. The triggers for inserting this information depend on the mode.

Types of Information

Type of Instruction When Inserted
Base64 Information about all SCTE-35 messages in the output is incorporated into the manifest; the entire SCTE-35 message is added in base64 format.
Cue-out, Cue-in SCTE-35 messages that are ad avails result in the insertion of cue-out, cue-in instructions.
Blackout

Only applies to the SCTE-35 Enhanced ad marker style (for HLS output; see Enabling Decoration – HLS).

SCTE-35 messages that are not ad avails result in the insertion of blackout start/end instructions, assuming that blackout is enabled. If blackout is not enabled, these instructions are not inserted.

Splice Insert Mode

Message Type ID: Splice Insert

Segmentation Type ID Base64 Cue-out, Cue-in Blackout
No segmentation descriptor present Yes Yes
Provider advertisement Yes Yes
Distributor advertisement Yes Yes
Placement opportunity Yes Yes
Other: Programs, Chapters, Network, Unscheduled Yes Yes

Message Type ID: Time Signal

Segmentation Type ID Base64 Cue-out, Cue-in Blackout
Provider advertisement Yes Yes
Distributor advertisement Yes Yes
Placement opportunity Yes Yes
Other: Programs, Chapters, Network, Unscheduled Yes Yes

For example, read the first line in the first table as follows: When a splice insert (with no segmentation descriptor) is encountered, the base64 and cue-out, cue-in information will be inserted in the manifest; blackout information will not be inserted.

Timesignal APOS Mode

Message Type ID: Splice Insert

Segmentation Type ID Base64 Cue-out, Cue-in Blackout
No segmentation descriptor present Yes
Provider advertisement Yes
Distributor advertisement Yes
Placement opportunity Yes
Other: Programs, Chapters, Network, Unscheduled Yes

Message Type ID: Time Signal

Segmentation Type ID Base64 Cue-out, Cue-in Blackout
Provider advertisement Yes
Distributor advertisement Yes
Placement opportunity Yes Yes
Other: Programs, Chapters, Network, Unscheduled Yes Yes

For example, read the first line in the first table as follows: When a splice insert (with no segmentation descriptor) is encountered, the base64 information will be inserted in the manifest, and cue-out, cue-in information and blackout information will not be inserted.