threefive 2.4.7

Pythonic SCTE35

🥇 threefive is the most advanced SCTE-35 tool, ever.

SCTE-35 Encoder and Decoder Python3 lib.

Latest Version is 2.4.7

• Decodes SCTE-35.
• Encodes SCTE-35.
• Parses SCTE-35 from Base64, Bytes, Hex, Integers, and MPEGTS Streams.
• Parses files, http(s), Multicast, UDP and even stdin ( you can pipe to it).
• Parses SCTE-35 from streams converted to bin data ( type 0x06 ) by ffmpeg.

threefive/go is now cuei

The threefive.Segment class for parsing HLS segments

Installation and Getting Started

Requirements

• threefive requires
  • pypy3 or python 3.6+ (pypy3 runs threefive 2-3 times faster than python 3.10)
  • new_reader
  • pyaes

• Install threefive
  • Fast Start
  • Super Cool Examples
• Versions and Releases

Versions and Releases

>>> import threefive
>>> threefive.version
'2.3.79'
>>>

• Release versions are odd.
• Unstable testing versions are even.

Parse SCTE-35 on the command line.

• Parse base64

threefive '/DAvAAAAAAAA///wFAVIAACPf+/+c2nALv4AUsz1AAAAAAAKAAhDVUVJAAABNWLbowo='

• Parse a hex value

threefive 0xFC302F000000000000FFFFF014054800008F7FEFFE7369C02EFE0052CCF500000000000A0008435545490000013562DBA30A

• Parse MPEGTS from stdin

cat video.ts | threefive

• Parse MPEGTS video over https

threefive https://so.slo.me/longb.ts

• Parse multicast

threefive udp://@235.35.3.5:3535

Parse SCTE-35 programmatically with a few lines of code.

Mpegts Multicast in three lines of code.

import threefive

strm = threefive.Stream('udp://@239.35.0.35:1234')
strm.decode()

(need an easy multicast server? gumd )

---

Mpegts over Https in three lines of code.

import threefive
strm = threefive.Stream('https://iodisco.com/ch1/ready.ts')
strm.decode()


       
   </details>

 <details><summary>Base64 in five lines of code.</summary>

```python3
>>> from threefive import Cue
>>> stuff = '/DAvAAAAAAAA///wBQb+dGKQoAAZAhdDVUVJSAAAjn+fCAgAAAAALKChijUCAKnMZ1g='
>>> cue=Cue(stuff)
>>> cue.decode()
True
 >>> cue.show()

---

Bytes in five lines of code.

>>> import threefive

>>> stuff = b'\xfc0\x11\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\x00\x00\x00O%3\x96'
>>> cue=Cue(stuff)
>>> cue.decode()
True
>>> cue.show()

---

Hex in 4 lines of code.

import threefive

cue = threefive.Cue("0XFC301100000000000000FFFFFF0000004F253396")
cue.decode()
cue.show()

Easy SCTE-35 encoding with threefive.

• Need SCTE-35 Packet Injection? SuperKabuki, powered by threefive.

• Helper functions for SCTE35 Cue encoding

Python 3.8.13 (7.3.9+dfsg-5, Oct 30 2022, 09:55:31)
[PyPy 7.3.9 with GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>> import threefive.encode
>>>> help(threefive.encode)



Help on module threefive.encode in threefive:

NAME
    threefive.encode - encode.py

DESCRIPTION
    threefive.encode has helper functions for Cue encoding.

FUNCTIONS
    mk_splice_insert(event_id, pts=None, duration=None, out=False)
        mk_cue returns a Cue with a Splice Insert.

        The args set the SpliceInsert vars.

        splice_event_id = event_id

        if pts is None (default):
            splice_immediate_flag      True
            time_specified_flag        False

        if pts:
            splice_immediate_flag      False
            time_specified_flag        True
            pts_time                   pts

        If duration is None (default)
            duration_flag              False

        if duration IS set:
            out_of_network_indicator   True
            duration_flag              True
            break_auto_return          True
            break_duration             duration
            pts_time                   pts

        if out is True:
            out_of_network_indicator   True

        if out is False (default):
            out_of_network_indicator   False

    mk_splice_null()
        mk_splice_null returns a Cue
        with a Splice Null

    mk_time_signal(pts=None)
         mk_time_signal returns a Cue
         with a Time Signal
        if pts is None:
             time_specified_flag   False

        if pts IS set:
             time_specified_flag   True
             pts_time              pts

Cue Class

• src cue.py
• The threefive.Cue class decodes a SCTE35 binary, base64, or hex encoded string.

class Cue(threefive.base.SCTE35Base)
 |  Cue(data=None, packet_data=None)

 |  __init__(self, data=None, packet_data=None)
 |      data may be packet bites or encoded string
 |      packet_data is a instance passed from a Stream instance

• Cue.decode()

 |  decode(self)
 |      Cue.decode() parses for SCTE35 data

• After Calling cue.decode() the instance variables can be accessed via dot notation.

    >>>> cue.command
    {'calculated_length': 5, 'name': 'Time Signal', 'time_specified_flag': True, 'pts_time': 21695.740089}

    >>>> cue.command.pts_time
    21695.740089

    >>>> cue.info_section.table_id

    '0xfc'

• Cue.get()

 |  get(self)
 |      Cue.get returns the SCTE-35 Cue
 |      data as a dict of dicts.

Cue.get() Example

>>> from threefive import Cue
>>> cue = Cue('0XFC301100000000000000FFFFFF0000004F253396')
>>> cue.decode()
True
>>> cue
{'bites': b'\xfc0\x11\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\x00\x00\x00O%3\x96',
'info_section': {'table_id': '0xfc', 'section_syntax_indicator': False, 'private': False, 'sap_type': '0x3',
'sap_details': 'No Sap Type', 'section_length': 17, 'protocol_version': 0, 'encrypted_packet': False,
'encryption_algorithm': 0, 'pts_adjustment_ticks': 0, 'pts_adjustment': 0.0, 'cw_index': '0x0', 'tier': '0xfff',
'splice_command_length': 4095, 'splice_command_type': 0, 'descriptor_loop_length': 0, 'crc': '0x4f253396'},
'command': {'command_length': None, 'command_type': 0, 'name': 'Splice Null'},
'descriptors': [], 'packet_data': None}

• Cue.get() omits cue.bites and empty values

>>> cue.get()
{'info_section': {'table_id': '0xfc', 'section_syntax_indicator': False,'private': False, 'sap_type': '0x3',
'sap_details': 'No Sap Type', 'section_length': 17, 'protocol_version': 0, 'encrypted_packet': False,
'encryption_algorithm': 0, 'pts_adjustment_ticks': 0, 'pts_adjustment': 0.0, 'cw_index': '0x0', 'tier': '0xfff',
'splice_command_length': 4095, 'splice_command_type': 0, 'descriptor_loop_length': 0, 'crc': '0x4f253396'},
'command': {'command_type': 0, 'name': 'Splice Null'},
'descriptors': []}

• Cue.get_descriptors()

 |  get_descriptors(self)
 |      Cue.get_descriptors returns a list of
 |      SCTE 35 splice descriptors as dicts.

• Cue.get_json()

 |  get_json(self)
 |      Cue.get_json returns the Cue instance
 |      data in json.

• Cue.show()

 |  show(self)
 |      Cue.show prints the Cue as JSON

• Cue.to_stderr()

 |  to_stderr(self)
 |      Cue.to_stderr prints the Cue

Stream Class

• src stream.py

• The threefive.Stream class parses SCTE35 from Mpegts.

• Supports:

  • File and Http(s) and Udp and Multicast protocols.
  • Multiple Programs.
  • Multi-Packet PAT, PMT, and SCTE35 tables.

• threefive tries to include pid, program, anf pts of the SCTE-35 packet.

class Stream(builtins.object)
 |  Stream(tsdata, show_null=True)
 |
 |  Stream class for parsing MPEG-TS data.

|  __init__(self, tsdata, show_null=True)
|
|      tsdata is a file or http, https,
|       udp or multicast url.
|
|      set show_null=False to exclude Splice Nulls

• Stream.decode(func=show_cue)

|  decode(self, func=show_cue)
|      Stream.decode reads self.tsdata to find SCTE35 packets.
|      func can be set to a custom function that accepts
|      a threefive.Cue instance as it's only argument.

Stream.decode Example

import sys
from threefive import Stream
>>>> Stream('plp0.ts').decode()

• Pass in custom function

• func should match the interface func(cue)

Stream.decode with custom function Example

import sys
import threefive

def display(cue):
   print(f'\033[92m{cue.packet_data}\033[00m')
   print(f'{cue.command.name}')

def do():
   sp = threefive.Stream(tsdata)
   sp.decode(func = display)

if __name__ == '__main__':
    do()

---

• Stream.decode_next()

|  decode_next(self)
|      Stream.decode_next returns the next
|      SCTE35 cue as a threefive.Cue instance.

Stream.decode_next Example

import sys
import threefive

def do():
    arg = sys.argv[1]
    with open(arg,'rb',encoding="utf-8") as tsdata:
        st = threefive.Stream(tsdata)
        while True:
            cue = st.decode_next()
            if not cue:
                return False
            if cue:
                cue.show()

if __name__ == "__main__":
    do()

• Stream.proxy(func = show_cue)

  • Writes all packets to sys.stdout.

  • Writes scte35 data to sys.stderr.

|  decode(self, func=show_cue_stderr)
|      Stream.decode_proxy writes all ts packets are written to stdout
|      for piping into another program like mplayer.
|      SCTE-35 cues are printed to stderr.

Stream.proxy Example

import threefive
sp = threefive.Stream('https://futzu.com/xaa.ts')
sp.decode_proxy()

• Pipe to mplayer

$ python3 proxy.py | mplayer -

---

• Stream.show()

|  show(self)
|   List programs and streams and info for MPEGTS

Stream.show() Example

>>>> from threefive import Stream
>>>> Stream('https://slo.me/plp0.ts').show()

    Service:    fancy ˹
    Provider:   fu-corp
    Pcr Pid:    1051[0x41b]
    Streams:
                Pid: 1051[0x41b]        Type: 0x1b AVC Video
                Pid: 1052[0x41c]        Type: 0x3 MP2 Audio
                Pid: 1054[0x41e]        Type: 0x6 PES Packets/Private Data
                Pid: 1055[0x41f]        Type: 0x86 SCTE35 Data

Need to verify your splice points?

• Try cue2vtt.py in the examples.

  • cue2vtt.py creates webvtt subtitles out of SCTE-35 Cue data

• use it like this

pypy3 cue2vtt.py video.ts | mplayer video.ts -sub -

---

Custom charsets for UPIDS aka upids.charset

Specify a charset for Upid data by setting threefive.upids.charset issue #55

• default charset is ascii
• python charsets info Here
• setting charset to None will return raw bytes.

Example Usage:

>>> from threefive import Cue,upids
>>> i="/DBKAAAAAAAAAP/wBQb+YtC8/AA0AiZDVUVJAAAD6X/CAAD3W3ACEmJibG5kcHBobkQCAsGDpQIAAAAAAAEKQ1VFSRSAIyowMljRk9c="

>>> upids.charset
'ascii'
>>> cue=Cue(i)
>>> cue.decode()
ascii
True
>>> cue.descriptors[0].segmentation_upid
'bblndpphnD\x02\x02���\x02\x00\x00'

>>> upids.charset="utf16"
>>> cue.decode()
utf16
True
>>> cue.descriptors[0].segmentation_upid
'扢湬灤桰䑮Ȃ菁ʥ\x00'

Parse Custom Splice Descriptors

1. Subclass threefive.descriptors.SpliceDescriptor
2. Add self.private_data to __init__
3. Add a decode method
4. Add it to threefive.descriptors.descriptor_map tag:Class 112: MDSNDescriptor

import threefive

class MDSNDescriptor(threefive.descriptors.SpliceDescriptor):
    """
    MDSNDescriptor
    """
    def __init__(self, bites=None):
        super().__init__(bites)
        self.name = "MDSN Descriptor"
        self.private_data=None

    def decode(self):
        self.private_data="".join(list(self.bites[: self.descriptor_length -4].decode()))


if __name__ == '__main__':
    threefive.descriptors.descriptor_map[112]=MDSNDescriptor 

    cue = threefive.Cue('/DBlAAAAAAAAAP/wBQb+GVJTDABPcAZNRFNOQzUCRUNVRUkAAKTff8MAACky4A8xdXJuOnV1aWQ6QnJlYWstQjAwMjA4NTU2ODlfMDAxMi0wNy0xMC1YMDExMjUxNjEyNDAAAPkSB7E=')
    cue.decode()
    cue.show()

a@debian:~/clean/scte35-threefive$ pypy3 mdsn.py 
{
    "info_section": {
        "table_id": "0xfc",
        "section_syntax_indicator": false,
        "private": false,
        "sap_type": "0x3",
        "sap_details": "No Sap Type",
        "section_length": 101,
        "protocol_version": 0,
        "encrypted_packet": false,
        "encryption_algorithm": 0,
        "pts_adjustment_ticks": 0,
        "pts_adjustment": 0.0,
        "cw_index": "0x0",
        "tier": "0xfff",
        "splice_command_length": 5,
        "splice_command_type": 6,
        "descriptor_loop_length": 79,
        "crc": "0xf91207b1"
    },
    "command": {
        "command_length": 5,
        "command_type": 6,
        "name": "Time Signal",
        "time_specified_flag": true,
        "pts_time": 4720.284578,
        "pts_time_ticks": 424825612
    },
    "descriptors": [
        {
            "tag": 112,
            "descriptor_length": 6,
            "name": "MDSN Descriptor",   # <---- Custom Descriptor parsed. 
            "identifier": "MDSN",
            "private_data": "C5"
        },
        {
            "tag": 2,
            "descriptor_length": 69,
            "name": "Segmentation Descriptor",
            "identifier": "CUEI",
            "components": [],
            "segmentation_event_id": "0xa4df",
            "segmentation_event_cancel_indicator": false,
            "program_segmentation_flag": true,
            "segmentation_duration_flag": true,
            "delivery_not_restricted_flag": false,
            "web_delivery_allowed_flag": false,
            "no_regional_blackout_flag": false,
            "archive_allowed_flag": false,
            "device_restrictions": "No Restrictions",
            "segmentation_duration": 30.0,
            "segmentation_duration_ticks": 2700000,
            "segmentation_message": "Provider Advertisement Start",
            "segmentation_upid_type": 15,
            "segmentation_upid_type_name": "URI",
            "segmentation_upid_length": 49,
            "segmentation_upid": "urn:uuid:Break-B0020855689_0012-07-10-X0112516124",
            "segmentation_type_id": 48,
            "segment_num": 0,
            "segments_expected": 0
        }
    ]
}

Powered by threefive

• myvideeotools.com online SCTE-35 Cue parser. Powered by threefive.
• POIS Server is Super Cool.
• bpkio-cli: A command line interface to the broadpeak.io APIs.
• x9k3: SCTE-35 HLS Segmenter and Cue Inserter.
  • amt-play uses x9k3.
• m3ufu: SCTE-35 m3u8 Parser.
• six2scte35: ffmpeg changes SCTE-35 stream type to 0x06 bin data, six2scte35 changes it back.
• SuperKabuki: SCTE-35 Packet Injection.
• showcues m3u8 SCTE-35 parser.

threefive | more

• Diagram of a threefive SCTE-35 Cue.

• ffmpeg and threefive and SCTE35 and Stream Type 0x6 bin data.

• Issues and Bugs and Feature Requests No forms man, just open an issue and tell me what you need.
  It needs to be threefive related or a "What is the meaning of life and stuff?" type of question.

---

• On the Servers I run OpenBSD.

• On my laptop, I run Debian Sid.