Convert mp4 to m3u8/hls

Hi guys!

I would like to know if is possible to convert mp4 to m3u8 using Shrine

# frozen_string_literal: true

require 'streamio-ffmpeg'

class VideoUploader < Shrine
  plugin :pretty_location

  Attacher.validate do
    validate_mime_type %w[video/mp4]
    validate_extension %w[mp4]
  end

  Attacher.derivatives do |original|
    transcoded = Tempfile.new ['transcoded', '.m3u8']
    screenshot = Tempfile.new ['screenshot', '.jpg']

    transcoder_options = { validate: false }

    movie = FFMPEG::Movie.new(original.path)
    movie.transcode(transcoded.path, %w[-codec: copy -start_number 0 -hls_time 10 -hls_list_size 0 -f hls], transcoder_options)
    movie.screenshot(screenshot.path)

    { transcoded: transcoded, screenshot: screenshot }
  end
end

The thing is that m3u8 files are chunk into multiple .ts and I don’t know if Shrine is compatible with this approach. This code is generating the .ts files in /tmp but only saving the .m3u8.

Thanks!