Subtitles Generator - draft

A node module to generate subtitles by segmenting a list of time-coded text.

Exports to

• TTML for Premiere as .xml
• TTML
• iTT - for Apple
• srt
• vtt
• csv
• txt - pre-segmented text

It can also provide pre-segmented lines if the input is plain text.

Setup

git clone, cd into folder, npm install

Usage

const subtitlesComposer = require('./src/index.js');
// const sampleWords = // some word json 
const subtitlesJson = subtitlesComposer({words: sampleWords, type: 'json'})
const ttmlPremiere = subtitlesComposer({words: sampleWords, type: 'premiere'})
const ittData = subtitlesComposer({words: sampleWords, type: 'itt'})
const ttmlData = subtitlesComposer({words: sampleWords, type: 'ttml'})
const srtData = subtitlesComposer({words: sampleWords, type: 'srt'})
const vttData = subtitlesComposer({words: sampleWords, type: 'vtt'})

see example-usage.js for more comprehensive example.

To try locally

npx babel-node example-usage.js

words Input

• either an array list of words objects
  example

const sampleWords =[ 
      {
        "id": 0,
        "start": 13.02,
        "end": 13.17,
        "text": "There"
      },
      {
        "id": 1,
        "start": 13.17,
        "end": 13.38,
        "text": "is"
      },
      {
        "id": 2,
        "start": 13.38,
        "end": 13.44,
        "text": "a"
      },
      {
        "id": 3,
        "start": 13.44,
        "end": 13.86,
        "text": "day."
      },
...

• or a string of text
  Example

const sampleWords = "There is a day. ..."

If input words is plain text only (and not a list of words with timecodes) then can only use pre-segment-txt option. (see test-presegment.txt for example)

Output:

see example-output folder for examples.

System Architecture

In pseudo code, at a high level

// expecting array list of words OR plain text string

  // if array list of words, convert text into string

  // presegment the text 
     using pre segmentation algorithm to break into line of x char - default 35

// generate subtitles 
   use subtitles generators for various format to convert presegemented json into subtitles

// return trsult

Segmentation algorithm refactored from pietrop/subtitlesComposer originally by @polizoto. And subtitles generation in various originally format by @laurian and @maboaas part of BBC Subtitlelizer project.

Development env

• npm > 6.1.0
• Node 10 - dubnium
• Eslint
• Babel

Node version is set in node version manager .nvmrc

Build

npm run build

uses babel-cli to transpile ES6 into the ./build folder.

Tests

npm test

To run tests during development

npm run test:watch

Linting

To run linter

npm run lint

To run and fix

npm run lint:fix

Deployment

coming soon, deploying to npm registry as @bbc/subtitles-composer

npm run publish:public

---

TODO

• Open source
• use import/export in modules
• add babel