Class: VideoDimensions::Backends::FFmpeg

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ FFmpeg

Returns a new instance of FFmpeg.



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

def self.binary
  'ffmpeg'
end

Instance Method Details

#bitrate ⇒ Object 



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# File 'lib/video_dimensions/backends/ffmpeg.rb', line 31

def bitrate
  # Video streams don't always surface their own bitrate, so we'll settle
  # for the "total" bitrate
  output.match(/^\s+Duration: .+bitrate: (\d+) kb\/s$/m) do |m|
    m[1].to_i
  end
end

#codec ⇒ Object 



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

def codec
  output.match(/Stream .+ Video: (\w+)/m) do |m|
    m[1]
  end
end

#dimensions ⇒ Object 



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

def dimensions
  output.match(/Stream .+ Video: .+ (\d+)x(\d+).*/) do |m|
    [m[1].to_i, m[2].to_i]
  end
end

#duration ⇒ Object 



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

def duration
  output.match(/Duration: ([\d\:]+)/) do |m|
    m[1]
  end
end

#framerate ⇒ Object 



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# File 'lib/video_dimensions/backends/ffmpeg.rb', line 51

def framerate
  output.match(/([\d\.]+) tbr/) do |m|
    m[1].to_f
  end
end

#height ⇒ Object 



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

def height
  dimensions && dimensions[1]
end

#width ⇒ Object 



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# File 'lib/video_dimensions/backends/ffmpeg.rb', line 23

def width
  dimensions && dimensions[0]
end