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SCTE-35: Splice Insert (Break Start)

An SCTE-35 splice_insert as XML: the cue that tells a downstream packager a linear ad break starts. outOfNetworkIndicator marks entry into the break, ptsTime is 8 seconds on the 90 kHz PTS clock, and the 30-second break auto-returns. This is the signal a manifest manipulator converts into an HLS EXT-X-CUE-OUT or a new DASH period.

Ad insertionStreaming manifestsVideo QA
Preview, first 10 linesxml
<?xml version="1.0" encoding="UTF-8"?>
<SpliceInfoSection xmlns="http://www.scte.org/schemas/35" protocolVersion="0" ptsAdjustment="0"
                   tier="4095" sapType="3">
  <SpliceInsert spliceEventId="1001" spliceEventCancelIndicator="false" outOfNetworkIndicator="true"
                spliceImmediateFlag="false" uniqueProgramId="1" availNum="1" availsExpected="1">
    <Program><SpliceTime ptsTime="720000"/></Program>
    <BreakDuration autoReturn="true" duration="2700000"/>
  </SpliceInsert>
</SpliceInfoSection>

Specifications

Standard
SCTE-35
Command
splice_insert
Splice Event Id
1001
Out Of Network
true: entering the break
Pts Time
720000 (8.0s at 90 kHz)
Break Duration
2700000 (30.0s at 90 kHz)
Auto Return
true
Alt Text
An SCTE-35 splice_insert as XML: the cue that tells a downstream packager a linear ad break starts
Alt Text Source
description

Testing contract

Expected to pass
Scenario
Parse the SCTE-35 message and compute the wall-clock start and end of the break it signals.
Expected result
A `splice_insert` command, splice event ID 1001, `outOfNetwork` true, PTS time 720000 (8.0s at 90 kHz) with a break duration of 2700000 (30.0s) and `autoReturn` true. The 90 kHz clock is the assertion: dividing by 90000 is required to reach seconds, and `autoReturn` means the return to network is implied rather than separately signalled.

What is a .xml file?

XML (Extensible Markup Language) is a verbose, self-describing markup language using nested tags, attributes, and namespaces to represent structured, hierarchical data. It supports schemas, entities, and validation and underlies many document and data formats. It remains common in enterprise, publishing, and interchange contexts.

How to use this file

Use an example XML file to test parsers, namespace and schema validation, XPath queries, and protection against entity-expansion and external-entity attacks.

How to use this file for testing

“SCTE-35: Splice Insert (Break Start)” is a deterministic Testaroo fixture for Ad insertion, Streaming manifests, Video QA. VAST ad responses and SCTE-35 splice descriptors covering linear break signalling, wrappers, and companion creatives, for testing ad-decision integration and manifest-manipulation logic without calling a real ad server.

Documented properties for this file: XML · 528 bytes. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.

Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such, expect parsers to fail loudly rather than silently accept them.

Media fixtures are short and synthetic by design. Prefer waveform or transcript ground truth in the same group when measuring ASR, trim, upscale, or sync tools; do not assume broadcast-quality masters.

Code examples

import xml.etree.ElementTree as ET

tree = ET.parse("scte35-splice-insert.xml")
root = tree.getroot()
print(root.tag, [c.tag for c in root][:5])

Generated by generation/video_timedtext.py. Free for any use, no attribution required, license.

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