Class: TranscodingMachine::Server::MediaFileAttributes

Inherits:
Hash
  • Object
show all
Defined in:
lib/transcoding_machine/server/media_file_attributes.rb

Constant Summary collapse

ASPECT_RATIO_2_35_BY_1 = 
2.35
ASPECT_RATIO_16_BY_9 = 
16.0 / 9.0
ASPECT_RATIO_4_BY_3 = 
4.0 / 3.0
ASPECT_RATIO_NAMES = 
{ASPECT_RATIO_2_35_BY_1 => '2.35/1', ASPECT_RATIO_16_BY_9 => '16/9', ASPECT_RATIO_4_BY_3 => '4/3'}
ASPECT_RATIO_VALUES = 
ASPECT_RATIO_NAMES.invert
CODECS = 
{'ffmp3' => :mp3, 'mp3' => :mp3, 'faad' => :aac, 'ffh264' => :h264, 'h264' => :h264, 'ffvp6f' => :flash_video}
TRACK_FIELD_TYPES = 
{
  :codec => :codec,
  :width => :integer,
  :height => :integer,
  :format => :string,
  :aspect => :float,
  :id => :integer,
  :bitrate => :integer,
  :fps => :float,
  :file_name => :string,
  :length => :float,
  :demuxer => :string,
  :rate => :integer,
  :channels => :integer
}
FIELD_TYPES = 
{
  :audio => :boolean,
  :audio_format => :string,
  :audio_rate => :integer,
  :audio_bitrate => :integer,
  :audio_codec => :codec,
  :audio_channels => :integer,
  :video => :boolean,
  :video_format => :string,
  :video_codec => :codec,
  :width => :integer,
  :height => :integer,
  :aspect_ratio => :float,
  :video_fps => :float,
  :video_bitrate => :integer,
  :ipod_uuid => :boolean,
  :bitrate => :integer,
  :length => :float,
  :file_name => :string,
  :file_extension => :string,
  :demuxer => :string,
  :poster_time => :float
}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(media_file_path) ⇒ MediaFileAttributes

Returns a new instance of MediaFileAttributes.



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# File 'lib/transcoding_machine/server/media_file_attributes.rb', line 58

def initialize(media_file_path)
  super()
  ffmpeg = FfmpegIntegrator.new(media_file_path)
  mplayer = MplayerIntegrator.new(media_file_path)

  puts "FFMPEG:\n#{ffmpeg.tracks.inspect}"

  puts "MPLAYER:\n#{mplayer.tracks.inspect}"

  store(:ipod_uuid, false)

  merge!(get_video_info(get_video_track(ffmpeg.tracks), get_video_track(mplayer.tracks)))
  merge!(get_audio_info(get_audio_track(ffmpeg.tracks), get_audio_track(mplayer.tracks)))
  merge!(get_container_info(ffmpeg.tracks[:container], mplayer.tracks[:container]))

  derive_values

  if video?
    atomic_parsley = AtomicParsleyIntegrator.new(media_file_path)
    puts "ATOMIC_PARSLEY:\n#{atomic_parsley.tracks.inspect}"
    store(:ipod_uuid, atomic_parsley.tracks[:container][:ipod_uuid])

    exiftool = ExifToolIntegrator.new(media_file_path)
    puts "EXIFTOOL:"
    puts exiftool.inspect
    store(:poster_time, exiftool.poster_time)
    if exiftool.aspect_ratio and aspect_ratio != exiftool.aspect_ratio
      store(:height, (width / exiftool.aspect_ratio).to_i)
      store(:aspect_ratio, exiftool.aspect_ratio)
    elsif exiftool.width && exiftool.height
      store(:width, exiftool.width)
      store(:height, exiftool.height)
      derive_values
    end
    fix_dimensions
  end

  delete_if {|key, value| value.nil?}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name, *args) ⇒ Object (private)

Intercept calls



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# File 'lib/transcoding_machine/server/media_file_attributes.rb', line 282

def method_missing(method_name, *args)
  if (FIELD_TYPES[method_name])
    self[method_name]
  else
    super
  end
end

Class Method Details

.parse_values(values) ⇒ Object 



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# File 'lib/transcoding_machine/server/media_file_attributes.rb', line 120

def self.parse_values(values)
  values.values.each do |track_values|
    track_values.each do |key, value|
      case TRACK_FIELD_TYPES[key]
      when :integer
        track_values[key] = value.to_i
      when :float
        track_values[key] = value.to_f
      when :codec
        track_values[key] = CODECS[value] || value
      end
    end
  end

  values
end

Instance Method Details

#audio? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/transcoding_machine/server/media_file_attributes.rb', line 102

def audio?
  audio
end

#thumbnail_file ⇒ Object 



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# File 'lib/transcoding_machine/server/media_file_attributes.rb', line 106

def thumbnail_file
  return @thumbnail_file if @thumbnail_file

  return nil unless video? and height and width

  time = poster_time
  if time.nil? or time == 0 or time > 30
    time = length / 10.0
    time = 10 if time > 10
  end

  @thumbnail_file = FfmpegIntegrator.create_thumbnail(file_name, width, height, time)
end

#video? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/transcoding_machine/server/media_file_attributes.rb', line 98

def video?
  video
end