cut-video-clips.js

import "@johnlindquist/kit"
const replaceAll = await npm('just-replace-all')
    
// Name: cut video clips

let cutsToMake = [

  {
    from: '00:10:40',
    to: '00:13:22',
    desc: '04 - 11 client side routing thoughts'
  },
  {
    from: '00:13:21',
    to: '00:15:29',
    desc: '04 - 12 approaching client side routing test'
  },
  {
    from: '00:15:28',
    to: '00:18:04',
    desc: '04 - 13 reach router thoughts'
  },
  {
    from: '00:18:03',
    to: '00:22:15',
    desc: '04 - 14 start page change test'
  },
  {
    from: '00:22:48',
    to: '00:26:17',
    desc: '04 - 15 h1 issues pt1'
  },
  {
    from: '00:26:31',
    to: '00:29:25',
    desc: '04 - 16 h1 issues pt2'
  },
  {
    from: '00:30:10',
    to: '00:33:37',
    desc: '05 - 01 puppeteer intro'
  },
  {
    from: '00:33:36',
    to: '00:35:54',
    desc: '05 - 02 a11y tree intro'
  },
  {
    from: '00:35:53',
    to: '00:38:24',
    desc: '05 - 03 a11y tree part 2'
  },
  {
    from: '00:38:42',
    to: '00:42:07',
    desc: '05 - 04 a11y tree resources'
  },
  {
    from: '00:43:05',
    to: '00:45:20',
    desc: '06 - 01 puppeteer test intro'
  },
  {
    from: '00:45:19',
    to: '00:48:13',
    desc: '06 - 02 puppeteer test setup pt1'
  },
  {
    from: '00:48:52',
    to: '00:49:31',
    desc: '06 - 03 test is running after rename'
  },
  {
    from: '00:49:29',
    to: '00:52:03',
    desc: '06 - 04 writing tree snapshot test'
  },
  {
    from: '00:52:03',
    to: '00:53:45',
    desc: '06 - 05 running tree snapshot test'
  },
  {
    from: '00:53:56',
    to: '00:56:29',
    desc: '06 - 06 intersting only mode'
  },
  {
    from: '00:56:27',
    to: '00:57:22',
    desc: '06 - 07 landmark exploration'
  },
  {
    from: '00:57:23',
    to: '01:02:16',
    desc: '06 - 08 start meganav assertion'
  },
  {
    from: '01:02:17',
    to: '01:04:52',
    desc: '06 - 09 end meganav assertion'
  },
  {
    from: '01:06:05',
    to: '01:10:46',
    desc: '06 - 10 new snapshot test'
  },
  {
    from: '01:11:56',
    to: '01:13:47',
    desc: '06 - 11 snapshot experiment'
  },
  {
    from: '01:14:20',
    to: '01:15:44',
    desc: '07 - 01 CI intro'
  },
  {
    from: '01:15:43',
    to: '01:16:35',
    desc: '07 - 02 start adding a workflow'
  },
  {
    from: '01:16:34',
    to: '01:18:37',
    desc: '07 - 03 add cct'
  },
  {
    from: '01:18:43',
    to: '01:20:28',
    desc: '07 - 04 check github actions'
  },
  {
    from: '01:23:47',
    to: '01:25:10',
    desc: '07 - 05 fix cct command'
  },
  {
    from: '01:25:13',
    to: '01:26:16',
    desc: '07 - 06 push updated command'
  },
  {
    from: '01:26:58',
    to: '01:27:42',
    desc: '07 - 07 watch cypress work'
  },
  {
    from: '01:28:20',
    to: '01:30:07',
    desc: 'q about wordpress'
  },
  {
    from: '01:30:13',
    to: '01:36:24',
    desc: 'q about lighthouse'
  },
  {
    from: '01:36:28',
    to: '01:38:35',
    desc: 'q about helmet'
  },
  {
    from: '01:38:43',
    to: '01:41:39',
    desc: 'q about prioritization'
  },

]

// from to desc

/*
*  Highlight the long video we are taking clips out of in Finder
*/
let longVideoFile = await getSelectedFile()

/**
 * Tell kit we want to be working in the same directory as the source file
 */
cd(path.dirname(longVideoFile))


for (let cut of cutsToMake) {
  let fadeLength = 1
  let clipFileName = `${replaceAll(cut.desc, ' ', '_')}.mp4`

  await exec(`ffmpeg -i "${longVideoFile}" -c copy -ss ${cut.from} -to ${cut.to} ${clipFileName}`)

  let { stdout } = await exec(`ffprobe -loglevel error -show_entries format=duration -of default=nk=1:nw=1 "${clipFileName}"`)
  let totalDuration = stdout

  let offset = totalDuration - fadeLength
  
  let editedVideo = await exec(`ffmpeg -i "${clipFileName}" -codec:v libx264 -crf 18 -filter_complex "[0:v]fade=type=in:duration=${fadeLength},fade=type=out:duration=${fadeLength}:start_time='${offset}'[v];[0:a]afade=type=in:duration=${fadeLength},afade=type=out:duration=${fadeLength}:start_time='${offset}'[a]" -map "[v]" -map "[a]" "${clipFileName}_fade.mp4"`)

}