DASH ad markers

MediaTailor

AWS Elemental MediaTailor uses SCTE-35 cue-out markers to identify ad avails in the DASH manifest using the following logic:

By default, AWS Elemental MediaTailor manages DASH manifests as multi-period manifests. You can change your configuration to handle single-period DASH manifests from your origin server. For information, see Creating an MediaTailor playback configuration.

The following sections provide additional detail about DASH ad marker handling and provides decorated manifests from the origin.

DASH origin manifest XML requirements

Ad markers in DASH manifests from the origin must be formatted properly for MediaTailor to identify ad breaks. The following topics describe these formatting requirements in clear XML.

SpliceInsert in clear XML

SpliceInsert ad markers in clear XML must contain the following:

<Period start="PT444806.040S" id="123586" duration="PT15.000S">
  <EventStream timescale="90000" schemeIdUri="urn:scte:scte35:2013:xml">
    <Event duration="1350000">
      <scte35:SpliceInfoSection protocolVersion="0" ptsAdjustment="180832" tier="4095">
        <scte35:SpliceInsert spliceEventId="4026531855" spliceEventCancelIndicator="false" outOfNetworkIndicator="true" spliceImmediateFlag="false" uniqueProgramId="1" availNum="1" availsExpected="1">
            <scte35:Program><scte35:SpliceTime ptsTime="5672624400"/></scte35:Program>
            <scte35:BreakDuration autoReturn="true" duration="1350000"/>
        </scte35:SpliceInsert>
      </scte35:SpliceInfoSection>
    </Event>
  .
  .
  .
</Period>

TimeSignal in clear XML

TimeSignal ad markers in clear XML must contain the following:

Cue-out numbers

The following are supported cue-out numbers for the segmentationTypeId.

<Period start="PT346530.250S" id="178443" duration="PT61.561S">
  <EventStream timescale="90000" schemeIdUri="urn:scte:scte35:2013:xml">
    <Event duration="5310000">
      <scte35:SpliceInfoSection protocolVersion="0" ptsAdjustment="183003" tier="4095">
        <scte35:TimeSignal>
          <scte35:SpliceTime ptsTime="3442857000"/>
         </scte35:TimeSignal>
        <scte35:SegmentationDescriptor segmentationEventId="1414668" segmentationEventCancelIndicator="false" segmentationDuration="8100000" segmentationTypeId="52" segmentNum="0" segmentsExpected="0">
            <scte35:DeliveryRestrictions webDeliveryAllowedFlag="false" noRegionalBlackoutFlag="false" archiveAllowedFlag="false" deviceRestrictions="3"/>
            <scte35:SegmentationUpid segmentationUpidType="12" segmentationUpidLength="2">0100</scte35:SegmentationUpid>
          </scte35:SegmentationDescriptor>
        </scte35:SpliceInfoSection>
    </Event>
  .
  .
  .
</Period>

DASH origin manifest base64-encoded binary requirements

Ad markers in DASH manifests from the origin must be formatted properly for MediaTailor to identify ad breaks. The following topics describe these formatting requirements in base64-encoded binary.

Both TimeSignal and SpliceInsert ad markers in base64-encoded manifests must contain the following:

The decoded binary must provide a splice_info_section with the same information as what's required for clear XML ad markers.

The decoded binary must provide a splice_info_section with the same set of information as the clear XML would provide in a scte35:SpliceInfoSection element. The command type must be either splice_insert() or time_signal(), and the additional settings must comply with those described previously for clear XML delivery.

The following example shows this option, with the required markers in bold.

<Period start="PT444806.040S" id="123586" duration="PT15.000S">
    <EventStream schemeIdUri="urn:scte:scte35:2014:xml+bin" timescale="1">
      <Event presentationTime="1541436240" duration="24" id="29">
        <scte35:Signal xmlns="http://www.scte.org/schemas/35/2016">
          <scte35:Binary>/DAhAAAAAAAAAP/wEAUAAAHAf+9/fgAg9YDAAAAAAAA25aoh</scte35:Binary>
        </scte35:Signal>
      </Event>
      <Event presentationTime="1541436360" duration="24" id="30">
        <scte35:Signal xmlns="http://www.scte.org/schemas/35/2016">
          <scte35:Binary>QW5vdGhlciB0ZXN0IHN0cmluZyBmb3IgZW5jb2RpbmcgdG8gQmFzZTY0IGVuY29kZWQgYmluYXJ5Lg==</scte35:Binary>
        </scte35:Signal>
      </Event>
  .
  .
  .
</Period>

The following is the decoded binary for the first event listed in the preceding example. The setting for splice_command_type is 5, which indicates splice_insert.

{
        "table_id": 252,
        "section_syntax_indicator": false,
        "private_indicator": false,
        "section_length": 33,
        "protocol_version": 0,
        "encrypted_packet": false,
        "encryption_algorithm": 0,
        "pts_adjustment": 0,
        "cw_index": 0,
        "tier": "0xFFF",
        "splice_command_length": 16,
        "splice_command_type": 5,
        "splice_command": {
          "splice_event_id": 448,
          "splice_event_cancel_indicator": false,
          "out_of_network_indicator": true,
          "program_splice_flag": true,
          "duration_flag": true,
          "splice_immediate_flag": false,
          "utc_splice_time": {
            "time_specified_flag": false,
            "pts_time": null
          },
          "component_count": 0,
          "components": null,
          "break_duration": {
            "auto_return": false,
            "duration": {
              "pts_time": 2160000,
              "wall_clock_seconds": 24.0,
              "wall_clock_time": "00:00:24:00000"
            }
          },
          "unique_program_id": 49152,
          "avail_num": 0,
          "avails_expected": 0
        },
        "splice_descriptor_loop_length": 0,
        "splice_descriptors": null,
        "Scte35Exception": {
          "parse_status": "SCTE-35 cue parsing completed with 0 errors.",
          "error_messages": [],
          "table_id": 252,
          "splice_command_type": 5
        }
      }