Class: TranscodingMachine::Server::MplayerIntegrator

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

Constant Summary collapse

BINARY = 
["mplayer"]
OPTIONS = 
["-identify", "-vo", "null", "-ao", "null", "-frames", "0", "-really-quiet", "-msgcharset", "utf8"]
TIMEOUT = 
60
MPLAYER_TRACK_FIELD_MAP = 
{
  'CODEC' => :codec,
  'WIDTH' => :width,
  'HEIGHT' => :height,
  'FORMAT' => :format,
  'ASPECT' => :aspect,
  'ID' => :id,
  'BITRATE' => :bitrate,
  'FPS' => :fps,
  'FILENAME' => :file_name,
  'LENGTH' => :length,
  'DEMUXER' => :demuxer,
  'RATE' => :rate,
  'NCH' => :channels
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file_path) ⇒ MplayerIntegrator

Returns a new instance of MplayerIntegrator.



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# File 'lib/transcoding_machine/server/media_file_attributes.rb', line 439

def initialize(file_path)
  commandline = []
  commandline += BINARY
  commandline += OPTIONS
  commandline += [file_path]
  puts "trying to run: #{commandline.join(' ')}"
  result = begin
    timeout(TIMEOUT) do
      Open3.popen3(*commandline) do |i, o, e|
        [o.read, e.read]
      end
    end
  rescue Timeout::Error => e
    puts "Timeout reached when inspecting #{file_path} with mplayer"
    raise e
  end

  raise "mplayer error when inspecting #{file_path}: #{result.last}" if result.first.empty? && !result.last.empty?

  mplayer_values = {:container => {:type => :container}}

  match = result.first.match(/.*ID_AUDIO_ID=(\d).*/)
  audio_track = mplayer_values["track_#{match[1]}".to_sym] = {:type => :audio} unless match.nil?

  match = result.first.match(/.*ID_VIDEO_ID=(\d).*/)
  video_track = mplayer_values["track_#{match[1]}".to_sym] = {:type => :video} unless match.nil?

  result.first.split(/\n/).each do |line|
    #puts line
    if (match = line.match(/ID_([^_]+)(_([^=].*))?=(.*)/))
      if match[3]
        key = MPLAYER_TRACK_FIELD_MAP[match[3]] || match[3]
      else
        key = MPLAYER_TRACK_FIELD_MAP[match[1]] || match[1]
      end
      case match[1]
      when 'VIDEO'
        video_track[key] = match[4]
      when 'AUDIO'
        audio_track[key] = match[4]
      else
        mplayer_values[:container][key] = match[4]
      end
    end
  end

  @tracks = MediaFileAttributes.parse_values(mplayer_values)
end

Instance Attribute Details

#tracks ⇒ Object

Returns the value of attribute tracks.



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# File 'lib/transcoding_machine/server/media_file_attributes.rb', line 418

def tracks
  @tracks
end