Module: Vidibus::Encoder::Helper::Tools

Included in:
Base
Defined in:
lib/vidibus/encoder/helper/tools.rb

Instance Method Summary collapse

Instance Method Details

#matching_frame_rate(list) ⇒ Object

Return a matching frame rate from given list. You may use this method to determine which of your valid frame rates fits the input best.

Raises:

  • (ArgumentError) 


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# File 'lib/vidibus/encoder/helper/tools.rb', line 9

def matching_frame_rate(list)
  raise(ArgumentError, 'Argument must be an array') unless list && list.is_a?(Array)
  input_frame_rate = input.frame_rate
  list.each do |rate|
    return rate if rate == input_frame_rate
  end
  # Detect the smallest multiple of any list entry
  lowest_q = nil
  wanted = nil
  list.each do |rate|
    q, r = input_frame_rate.divmod(rate)
    if r == 0 && (!lowest_q || lowest_q > q)
      lowest_q = q
      wanted = rate
    end
  end
  wanted
end