hls_capture.rb

#!/usr/bin/env ruby

require "open3"

base_url = ARGV.shift
hls_file = ARGV.shift

o, e, s = Open3.capture3 "curl #{base_url}#{hls_file}"
tslist = o.split("\n").delete_if{|i| i =~ /^#/ }

v_cmd = "ffmpeg "
a_cmd = "ffmpeg "
tslist.each do |ts|
  Open3.capture2e "curl -O #{base_url}#{ts}"
  Open3.capture2e "ffmpeg -i #{ts} -vcodec copy -an #{ts}.mp4"
  Open3.capture2e "ffmpeg -i #{ts} -acodec copy -vn #{ts}.aac"
  v_cmd += "-i #{ts}.mp4 "
  a_cmd += "-i #{ts}.aac "
end

Open3.capture2e "#{v_cmd} -filter_complex 'concat=n=#{tslist.size}:v=1:a=0' video.mp4"
Open3.capture2e "#{a_cmd} -filter_complex 'concat=n=#{tslist.size}:v=0:a=1' audio.aac"
Open3.capture2e "ffmpeg -i video.mp4 -i audio.aac #{Time.now.to_i}.mp4"
Open3.capture2e "rm video.mp4 audio.aac"
tslist.each do |ts|
  Open3.capture2e "rm #{ts} #{ts}.mp4 #{ts}.aac"
end