Class: VideoDimensions::Backends::MediaInfo

Inherits:
Base
  • Object
show all
Defined in:
lib/video_dimensions/backends/media_info.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ MediaInfo

Returns a new instance of MediaInfo.



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# File 'lib/video_dimensions/backends/media_info.rb', line 13

def initialize(input)
  @input = input
end

Class Method Details

.available? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/video_dimensions/backends/media_info.rb', line 4

def self.available?
  `which #{binary} 2>&1 > /dev/null`
  $?.exitstatus == 0
end

.binary ⇒ Object 



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# File 'lib/video_dimensions/backends/media_info.rb', line 9

def self.binary
  'mediainfo'
end

Instance Method Details

#bitrate ⇒ Object 



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# File 'lib/video_dimensions/backends/media_info.rb', line 33

def bitrate
  output.match(/^Bit rate\s+: ([\d\s]+) Kbps$/) do |m|
    m[1].gsub(' ', '').to_i
  end
end

#codec ⇒ Object 



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# File 'lib/video_dimensions/backends/media_info.rb', line 39

def codec
  output.match(/^Codec ID\s+: (.+)$/) do |m|
    m[1]
  end
end

#dimensions ⇒ Object 



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# File 'lib/video_dimensions/backends/media_info.rb', line 17

def dimensions
  [width, height] if width && height
end

#duration ⇒ Object 



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# File 'lib/video_dimensions/backends/media_info.rb', line 45

def duration
  # MediaInfo only incudes the two longest durations in the ouptut (e.g.,
  # 1h 5m; 5m 10s; 10s 15ms)
  output.match(/^Duration\s+:( \d+h)?( \d+mn)?( \d+s)?(?: \d+ms)?$/) do |m|
    # Map all of the captures to Integers, removing the time notation and
    # converting nils to 0, and use sprintf to include leading zeros
    sprintf("%02d:%02d:%02d", *m.captures.map(&:to_i))
  end
end

#framerate ⇒ Object 



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# File 'lib/video_dimensions/backends/media_info.rb', line 55

def framerate
  output.match(/^Frame rate\s+: ([\d\.]+) fps$/) do |m|
    m[1].to_f
  end
end

#height ⇒ Object 



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# File 'lib/video_dimensions/backends/media_info.rb', line 27

def height
  output.match(/^Height\s+: ([\d\s]+) pixels$/) do |m|
    m[1].gsub(' ', '').to_i
  end
end

#width ⇒ Object 



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# File 'lib/video_dimensions/backends/media_info.rb', line 21

def width
  output.match(/^Width\s+: ([\d\s]+) pixels$/) do |m|
    m[1].gsub(' ', '').to_i
  end
end