index.js

const fs = require('fs')
const getVideoMetaIndex = require('./src/get-video-meta-index')
const peelMetaStream = require('./src/peel-meta-stream')
const parseMetaFile = require('./src/parse-meta-file')

const args = {}
process.argv.slice(2).forEach((arg, i) => {
  if (i % 2 === 0) args[arg.replace(/^-/, '')] = process.argv[i + 3]
})

const META_TYPE = 'gpmd'
const VIDEO_INPUT = `./data/${args.input}`
const META_OUTPUT = './data/01.bin'
const META_OUTPUT_JSON = './data/meta.json'

const logger = console;

(async () => {
  const videoMetaIndex = await getVideoMetaIndex(VIDEO_INPUT, META_TYPE)
  if (!videoMetaIndex) return logger.log('Put a GoPro video in the data folder!')
  if (videoMetaIndex === -1) return logger.log(`No metadata stream found in the video ${VIDEO_INPUT}`)
  logger.log(`Meta stream found at index ${videoMetaIndex}`)
  logger.log(`Starting ffmpeg command to peel metadata from video ${VIDEO_INPUT}`)

  await peelMetaStream(VIDEO_INPUT, videoMetaIndex, META_OUTPUT)
  logger.log('Gps stream generated by ffmpeg file is ready to be parsed')

  const meta = await parseMetaFile(META_OUTPUT)

  fs.writeFileSync(META_OUTPUT_JSON, JSON.stringify(meta, null, 2))

  logger.log('This is the end ...')
})()