Thumbnails on progress bar

[vogler]

Seems like a sprite containing all thumbnails needs to be generated on the server since dynamically generating thumbnails in the browser is too slow or hard to do.

Standalone, for any player:

• https://github.com/web-streaming/ppbar - supports chapters, markers, heatmaps, thumbnails

Players with (plugins for) progress bar previews: see #1

• https://github.com/videojs/video.js
  • https://www.npmjs.com/package/videojs-vtt-thumbnails
  • https://www.npmjs.com/package/videojs-sprite-thumbnails
  • https://www.npmjs.com/package/videojs-thumbnails
• https://github.com/sampotts/plyr#preview-thumbnails recommends AWS transcoder
• https://github.com/tjenkinson/clappr-thumbnails-plugin recommends https://github.com/flavioribeiro/video-thumbnail-generator

Generate sprite with thumbnails:

• https://timelens.blinry.org via https://github.com/Chocobozzz/PeerTube/issues/537
• https://github.com/flavioribeiro/video-thumbnail-generator 251 Python
• https://github.com/bakape/thumbnailer 137 Go
• https://github.com/volumenetwork/video-thumbnail-generator 56 JS
• https://github.com/ultmaster/video-thumbnail 32 Python
• https://github.com/truethari/thumb-gen 17 Python
• just run ffmpeg: https://www.maketecheasier.com/create-thumbnail-sheets-for-videos-linux/