Class: Abrizer::FfmpegProcessor

Inherits:
Object
  • Object
show all
Includes:
FilepathHelpers
Defined in:
lib/abrizer/ffmpeg_processor.rb

Instance Method Summary collapse

Methods included from FilepathHelpers

#audio_filepath, #audio_filepath_fragmented, #basename, #canvas_filepath, #canvas_partial_filepath, #filename_directory, #first_image_filepath, #hlsts_filepath, #hlsts_partial_filepath, #mp4_filepath, #mp4_partial_filepath, #mpd_filepath, #mpd_partial_filepath, #output_directory, #output_directory_basename, #poster_image_filepath, #poster_partial_filepath, #sprites_filepath, #sprites_partial_filepath, #vp9_filepath, #vp9_partial_filepath, #webvtt_input_filepath

Constructor Details

#initialize(filename, output_dir = nil) ⇒ FfmpegProcessor

Returns a new instance of FfmpegProcessor.



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# File 'lib/abrizer/ffmpeg_processor.rb', line 6

def initialize(filename, output_dir=nil)
  @filename = filename
  @output_directory = output_dir
  @adaptation_finder = Abrizer::AdaptationFinder.new(@filename)
end

Instance Method Details

#first_pass_adaptation ⇒ Object 



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# File 'lib/abrizer/ffmpeg_processor.rb', line 24

def first_pass_adaptation
  adaptations = Abrizer::AdaptationFinder.new(@filename).adaptations
  sorted = adaptations.sort_by do |adaptation|
   adaptation.width
  end
  sorted[-2]
end

#first_pass_cmd ⇒ Object 



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# File 'lib/abrizer/ffmpeg_processor.rb', line 32

def first_pass_cmd
  first_pass_adaptation.ffmpeg_cmd(@filename, output_directory, 1)
end

#make_directory ⇒ Object 



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# File 'lib/abrizer/ffmpeg_processor.rb', line 20

def make_directory
  FileUtils.mkdir output_directory unless File.exist? output_directory
end

#process ⇒ Object 



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# File 'lib/abrizer/ffmpeg_processor.rb', line 12

def process
  make_directory
  Dir.chdir output_directory
  process_first_pass
  process_second_passes
  process_audio
end

#process_audio ⇒ Object 



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# File 'lib/abrizer/ffmpeg_processor.rb', line 52

def process_audio
  `ffmpeg -y -i #{@filename} -c:a libfdk_aac -b:a 128k -vn #{audio_filepath}`
  `mp4fragment #{audio_filepath} #{audio_filepath_fragmented}`
  FileUtils.rm audio_filepath
end

#process_first_pass ⇒ Object 



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# File 'lib/abrizer/ffmpeg_processor.rb', line 36

def process_first_pass
  puts first_pass_cmd
  `#{first_pass_cmd}`
end

#process_second_passes ⇒ Object

Creates a file per adaptation based on aspect ratio and resolution



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# File 'lib/abrizer/ffmpeg_processor.rb', line 42

def process_second_passes
  @adaptation_finder.adaptations.each do |adaptation|
    cmd = adaptation.ffmpeg_cmd(@filename, output_directory, 2)
    puts cmd
    `#{cmd}`
    `mp4fragment #{adaptation.filepath(@filename, output_directory)} #{adaptation.filepath_fragmented(@filename, output_directory)}`
    FileUtils.rm adaptation.filepath(@filename, output_directory)
  end
end