How would you generate a video thumbnail in Node.js using ffmpeg via a library like fluent-ffmpeg?

fluent-ffmpeg provides a Node.js-friendly wrapper around the ffmpeg command-line tool (which must be installed separately on the system or bundled via a package like ffmpeg-static), letting you programmatically extract a frame at a specific timestamp from a video file and save it as an image, commonly used to automatically generate a representative thumbnail for uploaded video content.

const ffmpeg = require('fluent-ffmpeg');

ffmpeg('input-video.mp4')
  .screenshots({
    timestamps: ['00:00:05'],
    filename: 'thumbnail.png',
    folder: './thumbnails',
  })
  .on('end', () => console.log('Thumbnail generated'));