Class: Bagel::Video::FFMPEG::FadeFilter

Inherits:
Object
  • Object
show all
Defined in:
lib/bagel/video/ffmpeg/fade_filter.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input_index, fade, label, alpha = false) ⇒ FadeFilter

Returns a new instance of FadeFilter.



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# File 'lib/bagel/video/ffmpeg/fade_filter.rb', line 13

def initialize(input_index, fade, label, alpha=false)
  @input_index = input_index
  @fade = fade
  @label = label
  @alpha = alpha
end

Instance Attribute Details

#alpha ⇒ Object (readonly)

Returns the value of attribute alpha.



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# File 'lib/bagel/video/ffmpeg/fade_filter.rb', line 3

def alpha
  @alpha
end

#fade ⇒ Object (readonly)

Returns the value of attribute fade.



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# File 'lib/bagel/video/ffmpeg/fade_filter.rb', line 3

def fade
  @fade
end

#input_index ⇒ Object (readonly)

Returns the value of attribute input_index.



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# File 'lib/bagel/video/ffmpeg/fade_filter.rb', line 3

def input_index
  @input_index
end

#label ⇒ Object (readonly)

Returns the value of attribute label.



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# File 'lib/bagel/video/ffmpeg/fade_filter.rb', line 3

def label
  @label
end

Class Method Details

.for_clip(fade) ⇒ Object 



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# File 'lib/bagel/video/ffmpeg/fade_filter.rb', line 5

def self.for_clip(fade)
  new(INDEX_VIDEO, fade, LABEL_VIDEO, false).to_s
end

.for_overlay(fade, input_index) ⇒ Object 



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# File 'lib/bagel/video/ffmpeg/fade_filter.rb', line 9

def self.for_overlay(fade, input_index)
  new(input_index+1, fade, "#{LABEL_OVERLAY}#{input_index}", true).to_s
end

Instance Method Details

#to_s ⇒ Object 



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# File 'lib/bagel/video/ffmpeg/fade_filter.rb', line 20

def to_s
  chain = []

  if fade.in_start && fade.in_duration
    chain << "fade=t=in:st=#{fade.in_start}:d=#{fade.in_duration}:alpha=#{alpha ? '1' : '0'}"
  end

  if fade.out_start && fade.out_duration
    chain << "fade=t=out:st=#{fade.out_start}:d=#{fade.out_duration}:alpha=#{alpha ? '1' : '0'}"
  end

  "[#{input_index}]#{chain.join(',')}[#{label}]"
end