Split, divides or cut a long video in mp4 parts (requires ffmpeg)

videosplit.js

#!/usr/bin/env node

let fs = require('fs');                 // FileSystem
let cmd = require('child_process');     // System calls
let path = require('path');             // Paths

let color = {
  red: '\x1b[31m',
  green: '\x1b[32m',
  yellow: '\x1b[33m',
  blue: '\x1b[34m',
  magenta: '\x1b[35m',
  cyan: '\x1b[36m',
  white: '\x1b[37m',
  lightgray: '\x1b[90m',
  lightred: '\x1b[91m',
  lightgreen: '\x1b[92m',
  lightyellow: '\x1b[93m',
  lightblue: '\x1b[94m',
  lightmagenta: '\x1b[95m',
  lightcyan: '\x1b[96m',
  lightwhite: '\x1b[97m',
  reset: '\x1b[0m',
  style: {
    bold: '\x1b[1m',
    underline: '\x1b[4m'
  }
}

// Example data.txt
// 00:00 00:59 Part 1 - Introduction
// 01:00 03:33 Part 2 - Content
// 03:34 06:41 Part 3 - The end

// Command syntax
if (process.argv.length == 2) {
  console.log(`Use: ${color.lightblue}${process.argv[1]}${color.reset} [--render] <original.mp4> <data.txt> [number-line-only-process]\n`);
  console.log(`\t${color.lightyellow}--render${color.reset}\tRe-encode entire video. More slow, but more accurate (youtube-friendly)`);
  console.log(`\t${color.lightyellow}<original.mp4>${color.reset}\tOriginal loooong video.`);
  console.log(`\t${color.lightyellow}<data.txt>${color.reset}\tFragments text file. Format: BEGIN_TIME END_TIME FILENAME`);
  console.log(`\t${color.lightyellow}[number]${color.reset}\tProcess only specified video/line. Optional.`);
  console.log(`\nThis command require ffmpeg and libraries installed.\n`);
  process.exit();
}

let render = '-vcodec copy -acodec copy';

if (process.argv[2] == '--render') {
  render = '';
  process.argv.splice(2,1);
}

let video = process.argv[2];
let data = process.argv[3];
let number = process.argv[4];

fs.readFile(data, 'utf8', (err,data) => {
  if (err)
    return console.error(err);
  else {

    // Process data
    lines = data.split('\r\n');
    lines.forEach((e,i) => {
      let [begin, end, ...filename] = e.split(' ');
      filename = filename.join(' ');
      let fullfilename = process.cwd() + path.sep + filename + '.mp4';

      if ((number == i+1) || (number == null)) {
        process.stdout.write(`File ${filename}.mp4... `);
        if (fs.existsSync(fullfilename))
          console.log(`Exists. ${color.lightblue}Skipping${color.reset}`);
        else {
          try {
            let time = process.hrtime();
            cmd.execSync(`ffmpeg -i "${video}" ${render} -ss ${begin} -to ${end} "${filename}.mp4"`, {stdio: ['ignore', 'pipe', 'pipe']});
            let [s,ns] = process.hrtime(time);
            s = (s > 60 ? Math.round(s/60) + 'min' : s + 'sec');
            console.log(`${color.green}Ok${color.reset} ${Math.round(fs.statSync(fullfilename).size / 1024 / 1024)}Mb ~${s}`);
          } catch(e) {
            console.log(`${color.red}Error ${e.status} ${e.stderr.toString().split('\r\n').slice(-3)[1]}${color.reset}`);
          }
        }
      }
    });

  }
});