Class: Umatic::Youtube

Inherits:
Channel show all
Defined in:
lib/channel/youtube.rb

Constant Summary collapse

QUALITY = 
{
  # low quality
  '5'  => { :f => 'flv',  :d => '240p' },
  '6'  => { :f => 'flv',  :d => '270p'},
  '13' => { :f => '3gp',  :d => 'N/A' },
  '17' => { :f => '3gp',  :d => '144p' },
  '18' => { :f => 'mp4',  :d => '360p' },

  # medium quality
  '34' => { :f => 'flv',  :d => '360p' },
  '35' => { :f => 'flv',  :d => '480p' },
  '43' => { :f => 'webm', :d => '360p' },
  '44' => { :f => 'webm', :d => '480p' },

  # high quality
  '22' => { :f => 'mp4',  :d => '720p' },
  '37' => { :f => 'mp4',  :d => '1080p' },
  '38' => { :f => 'mp4',  :d => '3072p' },
  '45' => { :f => 'webm', :d => '720p' },
  '46' => { :f => 'webm', :d => '1080p'  }
}

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Channel

channels, inherited, #initialize, open, #process

Constructor Details

This class inherits a constructor from Umatic::Channel

Class Method Details

.supports?(url) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/channel/youtube.rb', line 6

def self.supports? url
  url.match(/http[s]?:\/\/www.youtube.com\/watch?.*v=.+/) != nil
end

Instance Method Details

#parse(page) ⇒ Object 



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# File 'lib/channel/youtube.rb', line 32

def parse page
  json_match = page.match(/<script>.+ytplayer.config = (.+).+?<\/script>/)
  raise "Unable to retrieve video info" unless json_match
  info = JSON::parse json_match[1]

  title = info['args']['title']
  description = ''
  sources = []

  maps = info["args"]["url_encoded_fmt_stream_map"]
  maps.split(',').each do |m|
    params = CGI::parse(m)
    params.each { |k, v| params[k] = v[0] }
    itag = params['itag']
    next unless QUALITY.keys.include?(itag)

    s = OpenStruct.new
    s.format = QUALITY[itag][:f]
    s.info   = QUALITY[itag][:d]
    s.url    = "#{params['url']}&signature=#{params['sig']}"
    sources << s
  end

  {
    :title => title,
    :description => description,
    :sources => sources
  }
end