geerates chapters.txt from a youtube video id

chapters-youtube.rb

#!/bin/env ruby

# Usage: chapters-youtube.rb IDofTHEfineVIDEO
# see mux.rb - https://gist.github.com/akostadinov/8197947def1fe61c12a5ffffc615c969

require "json"
require "open-uri"

def sec_to_time(sec)
  sec = Integer(sec)
  hours = sec / 3600
  mins = ( sec - hours * 3600 ) / 60
  sec = ( sec - hours * 3600 - mins * 60 )
  "#{hours}:#{"%02d" % mins}:#{"%02d" % sec}"
end


yt_video_id = ARGV.first

base_url = "https://yt.lemnoslife.com/videos?part=chapters,contentDetails&id="

video_metadata = JSON.parse(URI.open("#{base_url}#{yt_video_id}").read)
chapters_json = video_metadata["items"].first["chapters"]["chapters"]
duration = video_metadata["items"].first["contentDetails"]["duration"]

chapter_lines = chapters_json.map {"#{sec_to_time(_1['time'])} #{_1['title']}" }
chapter_lines << "#{sec_to_time(duration)} end"

puts(chapter_lines.join("\n"))

example-output.txt

0:00:00 Intro
0:00:15 Welcome
0:03:43 Special Message
0:12:04 end