git-thinh

  const ffmpeg = child_process.spawn('ffmpeg', [
    // the input
    '-i',
    '-',

    // video codec config: low latency, adaptive bitrate, 
    // list of presets: https://trac.ffmpeg.org/wiki/Encode/H.264
    // tune zerolatency is good for fast encoding and low-latency streaming
    // g:v 60 ==> https://www.reddit.com/r/ffmpeg/comments/redaa2/while_livestreaming_to_youtube_using_ffmpeg_i_get/
    '-c:v',

git-thinh

const ffmpegTee = (youtube, twitch, facebook) => {
  return [
    '-i',
    '-',
    // select first stream intended for output
    '-map',
    '0',
    // video codec config: low latency, adaptive bitrate
    '-c:v',
    'libx264',