threefive3 3.0.37

SCTE-35 decoder and encoder with MPEGTS and HLS and XML support.

Install |SCTE-35 Cli | SCTE-35 HLS | Cue Class | Stream Class | Online SCTE-35 Parser | Encode SCTE-35 | SCTE-35 Examples | SCTE-35 XML

threefive3 is better than you.

✅ SCTE-35 Parser ✅ SCTE-35 Encoder ✅ SCTE-35 HLS ✅ SCTE-35 Xml+binary ✅ SCTE-35 Cli ✅ SCTE-35 library

• Parses SCTE-35 from MPEGTS, HLS, XML+Binary, Base64, Bytes, Hex, Integers, or JSON.
• Encode SCTE-35 to Base64, Bytes, Hex, Int, JSON,XML, or Xml+binary.
• Built-in network support for HTTP(S), UDP, and Multicast.
• Automatic AES decryption for HLS.
• All HLS SCTE-35 Tags are Supported.

Latest release is v3.0.37

_Released Thursday April 18th, 2025

Stay up to date, only the latest release is supported.

MPEGTS streams can be parsed for SCTE-35 with three lines of code.

a@fu:~/build5/scte35/scte35$ pypy3

>>>> from threefive3 import Stream
>>>> strm=Stream('https://futzu.com/xaa.ts')
>>>> strm.decode()

Checkout the Super Cool SCTE-35 Examples

threefive3 v3.0.37 is ready

• Xml is back and better than ever. The new Ultra Xml Parser Supreme replaces the Super Xml Parser.

XML

Documentation

• Install

Cli

• SCTE-35 Cli Super Tool Encodes, Decodes, and Recodes. This is pretty cool, it does SCTE-35 seven different ways.
  • The cli tool comes with builtin documentation just type threefive3 help

HLS

• Advanced Parsing of SCTE-35 in HLS with threefive3 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/threefive3$ 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.

---

| more

• Online SCTE-35 Parser Supporte Base64, Bytes,Hex,Int, Json, Xml, and Xml+binary.

• Encode SCTE-35 Some encoding code examples.

---

Install

• python3 via pip

python3 -mpip install threefive3

• pypy3

pypy3 -mpip install threefive3

• from the git repo

git clone https://github.com/superkabuki/scte35.git
cd threefive3
make install

---

Using the library

• Let me show you how easy threefive3 is to use.
• well start off reading SCTE-35 xml from a file

a@fu:~/threefive3$ 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 threefive3 import reader
>>>> from threefive3 import Cue
>>>> data =reader('/home/a/xml.xml').read()
* load it into a threefive3.Cue instance
```py3
>>>> 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
        },
        {
            "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
        }
    ]
}

• 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())
<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:SpliceInfoSection>

The Cli tool

The cli tool installs automatically with pip or the Makefile.

• SCTE-35 Inputs
• SCTE-35 Outputs
• Parse MPEGTS streams for SCTE-35
• Parse SCTE-35 in hls
• Display MPEGTS iframes
• Display raw SCTE-35 packets from video streams
• Repair SCTE-35 streams changed to bin data by ffmpeg

Inputs

• Most inputs are auto-detected.
• stdin is auto selected and auto detected.
• SCTE-35 data is printed to stderr
• stdout is used when piping video
• mpegts can be specified by file name or URI.

threefive3 udp://@235.2.5.35:3535

• If a file comtains a SCTE-35 cue as a string( base64,hex,int,json,or xml+bin), redirect the file contents.

  threefive3 < json.json  

• quoted strings(( base64,hex,int,json or xml+bin), can be passed directly on the command line as well.

threefive3 '/DAWAAAAAAAAAP/wBQb+ztd7owAAdIbbmw=='

Input Type	Cli Example
Base64	threefive3 '/DAsAAAAAyiYAP/wCgUAAAABf1+ZmQEBABECD0NVRUkAAAAAf4ABADUAAC2XQZU='
Hex	threefive3 0xfc301600000000000000fff00506fed605225b0000b0b65f3b
HLS	threefive3 hls https://example.com/master.m3u8
JSON	threefive3 < json.json
Xmlbin	js threefive3 < xmlbin.xml

Streams

Protocol	Cli Example
File	threefive3 video.ts
Http(s)	threefive3 https://example.com/video.ts
Stdin	threefive3 < video.ts
UDP Multicast	threefive3 udp://@235.35.3.5:9999
UDP Unicast	threefive3 udp://10.0.0.7:5555
HLS	threefive3 hls https://example.com/master.m3u8

Outputs

• output type is determined by the key words base64, bytes, hex, int, json, and xmlbin.
• json is the default.
• Any input (except HLS,) can be returned as any output
  • examples Base64 to Hex etc...)

Output Type	Cli Example
Base 64	threefive3 0xfc301600000000000000fff00506fed605225b0000b0b65f3b base64
Bytes	threefive3 0xfc301600000000000000fff00506fed605225b0000b0b65f3b bytes
Hex	threefive3 '/DAsAAAAAyiYAP/wCgUAAAABf1+ZmQEBABECD0NVRUkAAAAAf4ABADUAAC2XQZU=' hex
Integer	threefive3 '/DAsAAAAAyiYAP/wCgUAAAABf1+ZmQEBABECD0NVRUkAAAAAf4ABADUAAC2XQZU=' int
JSON	threefive3 0xfc301600000000000000fff00506fed605225b0000b0b65f3b json
Xml+bin	threefive3 0xfc301600000000000000fff00506fed605225b0000b0b65f3b xmlbin

hls

• parse hls manifests and segments for SCTE-35

threefive3 hls https://example.com/master.m3u8

---

Iframes

• Show iframes PTS in an MPEGTS video

threefive3 iframes https://example.com/video.ts

---

packets

• Print raw SCTE-35 packets from multicast mpegts video

threefive3 packets udp://@235.35.3.5:3535

---

proxy

• Parse a https stream and write raw video to stdout

threefive3 proxy video.ts

---

pts

• Print PTS from mpegts video

threefive3 pts video.ts

---

sidecar

• Parse a stream, write pts,write SCTE-35 Cues to sidecar.txt

threefive3 sidecar video.ts

---

sixfix

• Fix SCTE-35 data mangled by ffmpeg

threefive3 sixfix video.ts

---

show

• Probe mpegts video ( kind of like ffprobe )

 threefive3 show video.ts

---

version

• Show version

 threefive3 version

---

help

• Help

 threefive3 help

---

Stream Multicast with the threefive cli, it's easy.

• The threefive3 cli has long been a Multicast Receiver( client )
• The cli now comes with a builtin Multicast Sender( server).
• It's optimized for MPEGTS (1316 byte Datagrams) but you can send any video or file.
• The defaults will work in most situations, you don't even have to set the address.
• threefive3 cli also supports UDP Unicast Streaming.

a@fu:~$ threefive3 mcast help
usage: threefive3 mcast [-h] [-i INPUT] [-a ADDR] [-b BIND_ADDR] [-t TTL]

optional arguments:
  -h, --help            show this help message and exit
  -i INPUT, --input INPUT
                        like "/home/a/vid.ts" or "udp://@235.35.3.5:3535" 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]
a@fu:~$ 

iodisco.com/scte35

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Install threefive3 | SCTE-35 HLS | Cue Class | Stream Class | Online SCTE-35 Parser | Encode SCTE-35