Skip to content
Testaroo
xml801 B

SCTE-35: Time Signal With Segmentation Descriptor

The modern SCTE-35 form: a time_signal command carrying a segmentation descriptor rather than a bare splice_insert. Type 34 marks a provider placement opportunity start, and the delivery restrictions declare that this break may not be filled for web delivery: the field that ad-insertion logic is supposed to honour and frequently ignores. Includes a base64 UPID identifying the content.

Ad insertionStreaming manifestsVideo QA
Preview, first 13 linesxml
<?xml version="1.0" encoding="UTF-8"?>
<SpliceInfoSection xmlns="http://www.scte.org/schemas/35" protocolVersion="0" ptsAdjustment="0"
                   tier="4095" sapType="3">
  <TimeSignal><SpliceTime ptsTime="1440000"/></TimeSignal>
  <SegmentationDescriptor segmentationEventId="2002" segmentationEventCancelIndicator="false"
                          segmentationDuration="2700000" segmentationTypeId="34"
                          segmentNum="1" segmentsExpected="1">
    <DeliveryRestrictions webDeliveryAllowedFlag="false" noRegionalBlackoutFlag="true"
                          archiveAllowedFlag="true" deviceRestrictions="3"/>
    <SegmentationUpid segmentationUpidType="12" segmentationUpidLength="12">MDEyMzQ1Njc4OQ==</SegmentationUpid>
  </SegmentationDescriptor>
</SpliceInfoSection>

Specifications

Standard
SCTE-35
Command
time_signal
Segmentation Type Id
34 (Provider Placement Opportunity Start)
Segmentation Event Id
2002
Pts Time
1440000 (16.0s at 90 kHz)
Duration
2700000 (30.0s)
Web Delivery Allowed
false
Upid Type
12 (MPU)
Alt Text
The modern SCTE-35 form: a time_signal command carrying a segmentation descriptor rather than a bare splice_insert
Alt Text Source
description

Testing contract

Expected to pass
Scenario
Parse the SCTE-35 message and decide whether the break may be delivered to a web client.
Expected result
A `time_signal` command carrying segmentation type ID 34 (Provider Placement Opportunity Start), segmentation event ID 2002, PTS time 1440000 (16.0s at 90 kHz), duration 2700000 (30.0s) and UPID type 12 (MPU). `webDeliveryAllowed` is false, so a packager that inserts this break into an HLS or DASH output is ignoring an explicit restriction - the flag is the whole point of the fixture.

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: Time Signal With Segmentation Descriptor” 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: 2700000 (30.0s). 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-time-signal.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.

Related files