How SCTE 35 events are handled in manifests and sparse tracks

When you enable manifest decoration or sparse track in an HLS or Microsoft Smooth output group, 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

This table describes MediaLive handling when splice insert mode is enabled. The table shows how MediaLive will react when it encounters a specific message type and segmentation type in the source.

To read this table, find a message type in the first column and a segmentation type in the second column. Then read across in the other three columns. A Yes indicates that MediaLive will insert this type of information in the manifest when it encounters this message type and segmentation type.

Message type ID	Segmentation type	Inserts base64 information	Inserts cue-out, cue-in information	Inserts blackout information
splice insert	No segmentation descriptor present	Yes
	Provider advertisement	Yes	Yes
	Distributor advertisement	Yes	Yes
	Placement opportunity	Yes	Yes
	Break	Yes	Yes
	Other: Programs, Chapters, Network, Unscheduled	Yes	Yes	Yes
time signal	No segmentation descriptor present	Not applicable to time signal messages
	Provider advertisement	Yes	Yes
	Distributor advertisement	Yes	Yes
	Placement opportunity	Yes	Yes
	Break	Yes	Yes
	Other: Programs, Chapters, Network, Unscheduled	Yes	No	Yes

Timesignal APOS mode

This table describes MediaLive handling when timesignal APOS mode is enabled. The table shows how MediaLive will react when it encounters a specific message type and segmentation type in the source.

To read this table, find a message type in the first column and a segmentation type in the second column. Then read across in the other three columns. A Yes indicates that MediaLive will insert this type of information in the manifest when it encounters this message type and segmentation type.

Message type ID	Segmentation type	Inserts base64 information	Inserts cue-out, cue-in information	Inserts blackout information
splice insert	No segmentation descriptor present	Yes
	Provider advertisement	Yes
	Distributor advertisement	Yes
	Placement opportunity	Yes
	Break	Yes
	Other: Programs, Chapters, Network, Unscheduled	Yes
time signal	Provider advertisement	Yes
	Distributor advertisement	Yes
	Placement opportunity	Yes	Yes
	Break	Yes	Yes
	Other: Programs, Chapters, Network, Unscheduled	Yes		Yes