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Ad-marker specification: SSAI live - SCTE35

Overview SCTE-35 marker requirements Examples SCTE35 marker in HLS Live CUE-OUT-Style: elemental CUE-OUT-Style: scte35 enhanced CUE-OUT-Style: UnifiedStreaming CueOutStyle: EdgeWare scte35 CueOutStyle: GAM scte35 CueOutStyle: DATERANGE CueOutStyle: Harmonic CueOutStyle: EXT-X-SPLICEPOINT SCTE35 marker in MPEG-DASH live EventStream Conditions

Overview

This document describes the SCTE-35 marker requirements for ad insertion in live and VoD content.

SCTE-35 marker requirements

For accurate ad insertion or replacement, the type and timing of the SCTE-35 marker are critical and must meet the following requirements:

The signal must follow the SCTE-35 specification. For more information, see this document.
The signal must include a cue-out marker with the duration of the ad break.
The ad marker must be present in every HLS rendition, submanifest, or playlist.
The ad marker must be present for at least five seconds before the ad break starts.

Examples

SCTE35 marker in HLS Live

The following examples display how SCTE-35 markers might appear in HLS live streams to indicate ad breaks.

CUE-OUT-Style: elemental

#EXT-X-CUE-OUT:30.000
.
#EXT-X-CUE-OUT-CONT: 8.308/30 
.
#EXT-X-CUE-OUT-CONT: 20.391/30
.
#EXT-X-CUE-IN

CUE-OUT-Style: scte35 enhanced

#EXT-OATCLS-SCTE35:/DA0AAAAAAAAAAAABQb+ADAQ6QAeAhxDVUVJQAAAO3/PAAEUrEoICAAAAAAg+2UBNAAANvrtoQ==  
#EXT-X-ASSET:CAID=0x0000000020FB6501  
#EXT-X-CUE-OUT:30.000
.
#EXT-X-CUE-OUT-CONT:ElapsedTime=5.939,Duration=30.000,SCTE35=/DA0AAAA+…AAg+2UBNAAANvrtoQ==
.
#EXT-X-CUE-IN

CUE-OUT-Style: UnifiedStreaming

#EXT-X-DATERANGE:ID="20",START-DATE="2020-06-03T14:56:00Z",PLANNED-DURATION=19,SCTE35-OUT=0xFC302000000000000000FFF00F05000000147FFFFE001A17B0C0000000000061DFD67D
#EXT-X-CUE-OUT:19
#EXT-X-PROGRAM-DATE-TIME:2020-06-03T14:56:00Z
.
#EXT-X-CUE-IN

CueOutStyle: EdgeWare scte35

#EXT-X-SCTE35:CUE-OUT=YES,ID="22",DURATION=22.000,CUE="/DAlAAETZlHBAP/wFAUAAAAWf+//UmtLsH4AHjZgAAAAAAAAsf7cfA=="
.
#EXT-X-SCTE35:CUE-IN=YES,ID="22",DURATION=22.000,CUE="/DAlAAETZlHBAP/wFAUAAAAWf+//UmtLsH4AHjZgAAAAAAAAsf7cfA=="

CueOutStyle: GAM scte35

#EXT-X-CUE-OUT:DURATION=30
#EXT-X-CUE-OUT-CONT: 20.391/30
.
#EXT-X-CUE-IN

CueOutStyle: DATERANGE

#EXT-X-DATERANGE:ID="250520230322162753",START-DATE="2021-01-22T16:27:53.680Z",PLANNED-DURATION=135.200,SCTE35-OUT=0xfc302500000d9c536700fff01405000009c97fefffc6533580fe00b9ab40000000000000f6d0864c

CueOutStyle: Harmonic

#EXT-X-SCTE35:TYPE=0x37,CUE="/DBQAAAAAAAAAP/wFAUAAAfRf+//hxagD34AUpJOAAEAAAArAQpDVUVJPJ8jKjAwAh1DVUVJAAAH0X//AABSZcABCTAwMDAwMDAwMDYAAJ2hyjY="
.
#EXT-X-SCTE35:TYPE=0x22,ELAPSED=0.000,CUE="/DBBAAAAAAAAAP/wBQb/ht+vOgArAQpDVUVJFJ8jKjAyAh1DVUVJAAAD6X//AACJgywBCTAwMDAwMDAwMCIBAUtyN64="

CueOutStyle: EXT-X-SPLICEPOINT

#EXT-X-SPLICEPOINT-SCTE35:/DBgAAAAAAAAAP/wBQb/zSI7PwBKAh5DVUVJAAAAHn+DDA9NRFNOQjAwMTc5ODA1NTI3AAACKENVRUkAAAAff8MAAKpl4AwUTURTTkYzMTIwNTgzMDEwMDIzMDEQAADq1t3O

SCTE35 marker in MPEG-DASH live

The following example displays how an SCTE-35 marker might appear in a MPEG-DASH live stream to indicate ad breaks, including the timing and duration of the break.

EventStream

<EventStream schemeIdUri="urn:scte:scte35:2013a:bin" value="scte35_track_001_000" timescale="50000">
  <Event presentationTime="77934885650300" duration="1500000" id="31218">/DAlAAAAAAAAAP/wFAUAAHnyf+/+Ih1YrP4AKTLgAAAAAAAAXos7AQ==</Event>
</EventStream>

Conditions

Cue-out and cue-in triggers are supported only if both markers (cue-out and cue-in) are present in the signal for at least five seconds before the cue-out event occurs.
SCTE-104 (ad markers within an SDI signal) is supported only if the encoder, packager, or origin can perform SCTE-104 to SCTE-35 translation, such as the Elemental Live encoder.