Structure

Segment	Tag	Tag Count
Segment in which the ad avail starts.	OATCLS-SCTE35	1
Segment in which the ad avail starts.	ASSET	1
Segment in which the ad avail starts.	CUE-OUT	1
Each succeeding segment.	CUE-OUT-CONT	0-n
Segment in which ad avail ends.	CUE-IN	1

Tag contents

OATCLS-SCTE35 containing the base64 encoded raw bytes of the original SCTE-35 ad avail message.
ASSET containing the CAID or UPID as specified in the original SCTE35 message.
1 CUE-OUT per ad avail.
CUE-OUT-CONT containing the following:
- The elapsed time of the avail.
- The duration declared in the original SCTE35 message.
- SCTE35 containing the base64 encoded raw bytes of the original SCTE-35 ad avail message.
  These lines repeat until the ad avail ends.
CUE-IN to indicate the end of the avail.

Example

#EXT-OATCLS-SCTE35:/DA0AAAAAAAAAAAABQb+ADAQ6QAeAhxDVUVJQAAAO3/PAAEUrEoICAAAAAAg+2UBNAAANvrtoQ==  
#EXT-X-ASSET:CAID=0x0000000020FB6501  
#EXT-X-CUE-OUT:201.467
.
.
.
#EXT-X-CUE-OUT-CONT:ElapsedTime=5.939,Duration=201.467,SCTE35=/DA0AAAA+…AAg+2UBNAAANvrtoQ==
.
.
.
#EXT-X-CUE-IN

Meaning of /DA0AAAAAAAAAAAABQb+ADAQ6QAeAhxDVUVJQAAAO3/PAAEUrEoICAAAAAAg+2UBNAAANvrtoQ== acquired at https://comcast.github.io/scte35-js/

tableId: 252
selectionSyntaxIndicator: false
privateIndicator: false
sectionLength: 52
protocolVersion: 0
encryptedPacket: false
encryptedAlgorithm: 0
ptsAdjustment: 0
cwIndex: 0
tier: 0
spliceCommandLength: 5
spliceCommandType: 6
spliceCommand:
- specified: true
- pts: 3150057
descriptorLoopLength: 30
descriptors:
- 0:
  - spliceDescriptorTag: 2
  - descriptorLength: 28
  - indentifier: "CUEI"
  - segmentationEventId: 1073741883
  - segmentationEventCancelIndicator: false
  - programSegmentationFlag: true
  - segmentationDurationFlag: true
  - deliveryNotRestrictedFlag: false
  - webDeliveryAllowedFlag: false
  - noRegionalBlackoutFlag: true
  - archiveAllowedFlag: true
  - deviceResctrictions: 3
  - segmentationDuration: 18132042
  - segmentationUpidType: 8
  - segmentationUpidLength: 8
  - segmentationUpid:
    - 0: 0
    - 1: 0
    - 2: 0
    - 3: 0
    - 4: 32
    - 5: 251
    - 6: 101
    - 7: 1
  - segmentationTypeId: 52
  - segmentNum: 0
  - segmentsExpected: 0
crc: 922414497

Others

https://docs.aws.amazon.com/medialive/latest/ug/schedule-fields-for-splice_insert.html