Class: Wavesync::BpmDetector

Inherits:
Object
  • Object
show all
Defined in:
lib/wavesync/bpm_detector.rb

Class Method Summary collapse

Class Method Details

.available? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wavesync/bpm_detector.rb', line 7

def self.available?
  system('which bpm > /dev/null 2>&1') && system('which ffmpeg > /dev/null 2>&1')
end

.detect(file_path) ⇒ Object 



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# File 'lib/wavesync/bpm_detector.rb', line 11

def self.detect(file_path)
  output = `ffmpeg -i #{Shellwords.escape(file_path)} -ac 1 -ar 44100 -f f32le - 2>/dev/null | bpm`
  bpm = output.strip.to_f
  bpm.positive? ? bpm.round : nil
rescue StandardError
  nil
end