threefive is the highest rated SCTE-35 tool. Ever.

• Decodes SCTE-35 from MPEGTS✔ Base64✔ Bytes✔ DASH✔ Hex ✔ HLS✔ Integers✔ JSON✔ XML✔ XML+Binary✔
• Encodes SCTE-35 to MPEGTS✔ Base64✔ Bytes✔ Hex✔ Integers✔ JSON✔ XML✔ XML+Binary✔

  ---

[ News ]

• threefive now has support for SCTE-35-2. Event Descriptors and Property types from the recently published 2026 SCTE-35-2 Specification.
• threefive v3.0.93 will support HLS autodetection in the cli.

  ---

[ Latest threefive version is v3.0.91 ]

[ Examples ]

[ Tip of the Week ]

[ Documentation ]

Need to inject SCTE-35 into HLS? X9k3.

• web based SCTE-35 tools - threefive and friends over http.
• install
• quick start
• command line tools
  • threefive decode SCTE-35 on the command line
  • scte35bump adjust SCTE-35 PTS in MPEGTS streams
  • scte35fix ffmpeg changes scte-35 streams into bin data, scte35fix changes them back.
  • scte35inject scte35inject inject scte-35 into mpegts.
  • gums gums is a multicast sender(server) for video
• library
  • Using the threefive.Cue class
  • Using the threefive library decode SCTE-35 with less than ten lines of code
  • • threefive Classes threefive is OO, made to subclass
      • Cue Class this class you'll use often
      • Stream Class this is the class for parsing MPEGTS
• SCTE-35 Sidecar Files threefive supports SCTE-35 sidecar files
• SCTE-35 HLS _parse SCTE-35 in HLS__
• SCTE-35 XML and More XML threefive can parse and encode SCTE-35 xml
• Encode SCTE-35 threefive can encode SCTE-35 in every SCTE-35 format
• Make your threefive script an executable with cython threefive is compatible with all python tools

[Install]

• python3 via pip

  python3 -mpip install threefive

• pypy3 via pip

  pypy3 -mpip install threefive

• To add SRT support

  python3 -m pip install srtfu

• To add Automatic AES decryption

  python3 -mpip install pyaes

• From the git repo

git clone https://github.com/superkabuki/scte35.git
cd threefive
make install

• I've jazzed up the makefile to make it easier to install for different python versions and pypy3

  
  git clone https://github.com/superkabuki/scte35.git
  cd threefive

make install py3=pypy3

OR

make install py3=python3.14

works for any python in your path or use a full path if needed.

# [⇧](#-documentation-)
___

### [CLI]
The threefive cli tool is able to parse SCTE-35 from MPEGTS Streams,Base64,Hex,Integers,JSON XML,and XMLBinary.
The format is auto-detected.

# [⇧](#-documentation-)

#### [ Parse SCTE-35 from HLS with threefive ]
```js
threefive https://example.com/master.m3u8

[ Parse SCTE-35 from MPEGTS ]

SCTE-35 can be parsed from MPEGTS over a variety of protocols.

• SCTE-35 Input: MPEGTS
• Protocols: pipes, files, stdin, http(s), multicast,SRT and UDP.
• SCTE-35 Output: JSON (default) base64, bytes, hex, int, xml, and xmlbin.

⇧

[ Parse SCTE-35 Cues ]

• The default output is JSON
• SCTE-35 Inputs: base64, hex, int, JSON,int,xml,and xmlbin.
• SCTE-35 Outputs: base64, bytes, hex, int,JSON, xml, and xmlbin.
• Any Input can be used with Any Output

Here are several examples.

⇧

[Additional functionality]

• threefive has several additional features, mostly related to MPEGTS streams.
• threefive has built in help, just type threefive help
• This table shows how to use them.

⇧

Other tools

threefive also comes with:

scte35bump

• bump adjusts SCTE-35 PTS in an MPEGTS stream

$ scte35bump -h
usage: scte35bump [-h] [-i INFILE] [-o OUTFILE] [-s SECS]

options:
  -h, --help            show this help message and exit
  -i INFILE, --infile INFILE
                        Input source, stdin, file, http(s), udp, or multicast
                        mpegts [default: sys.stdin.buffer]
  -o OUTFILE, --outfile OUTFILE
                        Output file [default: sys.stdout.buffer]
  -s SECS, --secs SECS  Adjustment to apply to SCTE-35 Cues. [default: 0.0]

scte35bump is part of threefive.

⇧

gums

• the Grande Udp Multicast Server

$ gums -h
usage: gums [-h] [-i INPUT] [-a ADDR] [-b BIND_ADDR] [-t TTL]

options:
  -h, --help            show this help message and exit
  -i INPUT, --input INPUT
                        like "/home/a/vid.ts" or "https://futzu.com/xaa.ts"
                        [default: sys.stdin.buffer]
  -a ADDR, --addr ADDR  Destination IP:Port [default: 235.35.3.5:3535]
  -b BIND_ADDR, --bind_addr BIND_ADDR
                        Local IP to bind [default: 0.0.0.0]
  -t TTL, --ttl TTL     Multicast TTL (1 - 255) [default: 32]

gums is part of threefive.

⇧

HLS

• parse HLS for SCTE-35. Supports all HLS SCTE-35 tags.

$ threefive hls help

[ Input ] threefive hls takes an m3u8 URI as input. M3U8 formats supported:

• master ( When a master.m3u8 used, threefive hls parses the first rendition it finds )
• rendition Segment types supported:
• AAC
• AC3
• MPEGTS *codecs:
  • video
    • mpeg2, h.264, h.265
  • audio
    • mpeg2, aac, ac3, mp3

⇧

scte35fix

• when ffmpeg changes a SCTE-35 stream to bin data stream, scte35fix changes it back.

$ scte35fix -h

  scte35fix checks MPEGTS for SCTE-35 Streams
  that have been change to bin data (type 0x06)
  and changes them back to SCTE-35 (type 0x86) streams.
  Output files are created in the current directory
  and prefixed with 'sixfix-'.
  Only bin data streams containing SCTE-35 will be converted.
  Multiple files can be specified on the command line.
  Wild cards work too.

  Example Usage:
        scte35fix video.ts
        scte35fix video1.ts video2.ts
        scte35fix video*.ts
        scte35fix https://example.com/video.ts
        scte35fix srt://10.10.10.13:4201
scte35fix is part of threefive.

⇧

[Using the library]

• Let me show you how easy threefive is to use.

• reading SCTE-35 xml from a file

  a@fu:~/threefive$ pypy3
  Python 3.9.16 (7.3.11+dfsg-2+deb12u3, Dec 30 2024, 22:36:23)
  [PyPy 7.3.11 with GCC 12.2.0] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  >>>> from threefive import reader
  >>>> from threefive import Cue
  >>>> data =reader('/home/a/xml.xml').read()

• load it into a threefive.Cue instance

  >>>> cue = Cue(data)

• Show the data as JSON

  >>>> cue.show()
  {
    "info_section": {
        "table_id": "0xfc",
        "section_syntax_indicator": false,
        "private": false,
        "sap_type": "0x03",
        "sap_details": "No Sap Type",
        "section_length": 92,
        "protocol_version": 0,
        "encrypted_packet": false,
        "encryption_algorithm": 0,
        "pts_adjustment": 0.0,
        "cw_index": "0x00",
        "tier": "0x0fff",
        "splice_command_length": 15,
        "splice_command_type": 5,
        "descriptor_loop_length": 60,
        "crc": "0x7632935"
    },
    "command": {
        "command_length": 15,
        "command_type": 5,
        "name": "Splice Insert",
        "break_auto_return": false,
        "break_duration": 180.0,
        "splice_event_id": 1073743095,
        "splice_event_cancel_indicator": false,
        "out_of_network_indicator": true,
        "program_splice_flag": false,
        "duration_flag": true,
        "splice_immediate_flag": false,
        "event_id_compliance_flag": true,
        "unique_program_id": 1,
        "avail_num": 12,
        "avails_expected": 5
    },
    "descriptors": [
        {
            "tag": 0,
            "identifier": "CUEI",
            "name": "Avail Descriptor",
            "provider_avail_id": 12,
            "descriptor_length": 8
        },
        {
            "tag": 0,
            "identifier": "CUEI",
            "name": "Avail Descriptor",
            "provider_avail_id": 13,
            "descriptor_length": 8
        },
  
    ]
  }

• convert the data back to xml

  >>>> print(cue.xml())
  <scte35:SpliceInfoSection xmlns:scte35="https://scte.org/schemas/35"  ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
   <scte35:SpliceInsert spliceEventId="1073743095" spliceEventCancelIndicator="false" spliceImmediateFlag="false" eventIdComplianceFlag="true" availNum="12" availsExpected="5" outOfNetworkIndicator="true" uniqueProgramId="1">
      <scte35:BreakDuration autoReturn="false" duration="16200000"/>
   </scte35:SpliceInsert>
   <scte35:AvailDescriptor providerAvailId="12"/>
   <scte35:AvailDescriptor providerAvailId="13"/>
   <scte35:AvailDescriptor providerAvailId="14"/>
   <scte35:AvailDescriptor providerAvailId="15"/>
   <scte35:AvailDescriptor providerAvailId="16"/>
   <scte35:AvailDescriptor providerAvailId="17"/>
  </scte35:SpliceInfoSection>

• convert to xml+binary

  >>>> print(cue.xmlbin())
  <scte35:Signal xmlns:scte35="https://scte.org/schemas/35">
    <scte35:Binary>/DBcAAAAAAAAAP/wDwVAAAT3f69+APcxQAABDAUAPAAIQ1VFSQAAAAwACENVRUkAAAANAAhDVUVJAAAADgAIQ1VFSQAAAA8ACENVRUkAAAAQAAhDVUVJAAAAEQdjKTU=</scte35:Binary>
  </scte35:Signal>

• convert to base64

  >>>> print(cue.base64())
  /DBcAAAAAAAAAP/wDwVAAAT3f69+APcxQAABDAUAPAAIQ1VFSQAAAAwACENVRUkAAAANAAhDVUVJAAAADgAIQ1VFSQAAAA8ACENVRUkAAAAQAAhDVUVJAAAAEQdjKTU=

• convert to hex

  >>>> print(cue.hex())
  0xfc305c00000000000000fff00f05400004f77faf7e00f7314000010c05003c0008435545490000000c0008435545490000000d0008435545490000000e0008435545490000000f000843554549000000100008435545490000001107632935

• show just the splice command

  >>>> cue.command.show()
  {
    "command_length": 15,
    "command_type": 5,
    "name": "Splice Insert",
    "break_auto_return": false,
    "break_duration": 180.0,
    "splice_event_id": 1073743095,
    "splice_event_cancel_indicator": false,
    "out_of_network_indicator": true,
    "program_splice_flag": false,
    "duration_flag": true,
    "splice_immediate_flag": false,
    "event_id_compliance_flag": true,
    "unique_program_id": 1,
    "avail_num": 12,
    "avails_expected": 5
  }

• edit the break duration

  >>>> cue.command.break_duration=30
  >>>> cue.command.show()
  {
    "command_length": 15,
    "command_type": 5,
    "name": "Splice Insert",
    "break_auto_return": false,
    "break_duration": 30,
    "splice_event_id": 1073743095,
    "splice_event_cancel_indicator": false,
    "out_of_network_indicator": true,
    "program_splice_flag": false,
    "duration_flag": true,
    "splice_immediate_flag": false,
    "event_id_compliance_flag": true,
    "unique_program_id": 1,
    "avail_num": 12,
    "avails_expected": 5
  }

• re-encode to base64 with the new duration

  >>>> cue.base64()
  '/DBcAAAAAAAAAP/wDwVAAAT3f69+ACky4AABDAUAPAAIQ1VFSQAAAAwACENVRUkAAAANAAhDVUVJAAAADgAIQ1VFSQAAAA8ACENVRUkAAAAQAAhDVUVJAAAAEe1FB6g='

• re-encode to xml with the new duration

  >>>> print(cue.xml())
  <scte35:SpliceInfoSection xmlns:scte35="https://scte.org/schemas/35"  ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
   <scte35:SpliceInsert spliceEventId="1073743095" spliceEventCancelIndicator="false" spliceImmediateFlag="false" eventIdComplianceFlag="true" availNum="12" availsExpected="5" outOfNetworkIndicator="true" uniqueProgramId="1">
      <scte35:BreakDuration autoReturn="false" duration="2700000"/>
   </scte35:SpliceInsert>
   <scte35:AvailDescriptor providerAvailId="12"/>
   <scte35:AvailDescriptor providerAvailId="13"/>
   <scte35:AvailDescriptor providerAvailId="14"/>
   <scte35:AvailDescriptor providerAvailId="15"/>
   <scte35:AvailDescriptor providerAvailId="16"/>
   <scte35:AvailDescriptor providerAvailId="17"/>
  </scte35:SpliceInfoSection>

• show just the descriptors

  >>>> _ = [d.show() for d in cue.descriptors]
  {
    "tag": 0,
    "identifier": "CUEI",
    "name": "Avail Descriptor",
    "provider_avail_id": 12,
    "descriptor_length": 8
  }
  {
    "tag": 0,
    "identifier": "CUEI",
    "name": "Avail Descriptor",
    "provider_avail_id": 13,
    "descriptor_length": 8
  }
  {
    "tag": 0,
    "identifier": "CUEI",
    "name": "Avail Descriptor",
    "provider_avail_id": 14,
    "descriptor_length": 8
  }
  {
    "tag": 0,
    "identifier": "CUEI",
    "name": "Avail Descriptor",
    "provider_avail_id": 15,
    "descriptor_length": 8
  }
  {
    "tag": 0,
    "identifier": "CUEI",
    "name": "Avail Descriptor",
    "provider_avail_id": 16,
    "descriptor_length": 8
  }
  {
    "tag": 0,
    "identifier": "CUEI",
    "name": "Avail Descriptor",
    "provider_avail_id": 17,
    "descriptor_length": 8
  }

• pop off the last descriptor and re-encode to xml

cue.descriptors.pop() {'tag': 0, 'identifier': 'CUEI', 'name': 'Avail Descriptor', 'private_data': None, 'provider_avail_id': 17, 'descriptor_length': 8} print(cue.xml())

``` ___

⇧

[web]

• threefive SCTE-35 Online Parser hosted on my server iodisco.com
• Parse SCTE-35 in MPEGTS over HTTP, in your browser with Go, Wasm and Super Karate Death Car hosted om my server bigcorp.ltd
• Parse SCTE-35 in MPEGTS over HTTP, in your browser with threefive.js,javascript, and a little sed just to keep things interesting. hosted om my server bigcorp.ltd
• SCTE-35 Online Parser powered by threefive another online parser powered by threefive not hosted on my servers.
• SCTE-35 As a Service if you can make an http request, you can parse SCTE-35, no install needed. hosted on my server iodisco.com

  ---

⇧

[XML]

• XML New! updated 05/01/2025

[HLS]

• Advanced Parsing of SCTE-35 in HLS with threefive All HLS SCTE-35 tags, Sidecar Files, AAC ID3 Header Timestamps, SCTE-35 filters... Who loves you baby?

⇧

[Classes]

• The python built in help is always the most up to date docs for the library.

a@fu:~/build7/threefive$ pypy3

>>>> from threefive import Stream
>>>> help(Stream)

• Class Structure
• Cue Class Cue is the main SCTE-35 class to use.
• Stream Class The Stream class handles MPEGTS SCTE-35 streams local, Http(s), UDP, and Multicast.

⇧

[threefive now supports SRT]

• ( You have to unmute the audio )

https://github.com/user-attachments/assets/a323ea90-867f-480f-a55f-e9339263e511

• more SRT and threefive info

• checkout SRTfu

⇧

[more]

• Encode SCTE-35 Some encoding code examples.

  ---

⇧