Class: Ffmprb::Process::Input::Cut

Inherits:
ChainBase show all
Defined in:
lib/ffmprb/process/input/cut.rb

Instance Attribute Summary collapse

Attributes inherited from Ffmprb::Process::Input

#io, #process

Instance Method Summary collapse

Methods inherited from ChainBase

#chain_copy, #channel, #unfiltered, #unfiltered=

Methods inherited from Ffmprb::Process::Input

#args, #audio, audio_args, #chain_copy, #channel, #channel?, #copy, #crop, #cut, #loop, #mute, #pace, #pp, resolve, #reverse, #temporise_io!, #video, video_args, #volume

Constructor Details

#initialize(unfiltered, from:, to:) ⇒ Cut

Returns a new instance of Cut.



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# File 'lib/ffmprb/process/input/cut.rb', line 15

def initialize(unfiltered, from:, to:)
  super unfiltered
  @from = from
  @to = to.to_f == 0 ? nil : to

  fail Error, "cut from: must be"  unless from
  fail Error, "cut from: must be less than to:"  unless !to || from < to
end

Instance Attribute Details

#from ⇒ Object (readonly)

Returns the value of attribute from.



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# File 'lib/ffmprb/process/input/cut.rb', line 13

def from
  @from
end

#to ⇒ Object (readonly)

Returns the value of attribute to.



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# File 'lib/ffmprb/process/input/cut.rb', line 13

def to
  @to
end

Instance Method Details

#filters_for(lbl, video:, audio:) ⇒ Object 



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# File 'lib/ffmprb/process/input/cut.rb', line 24

def filters_for(lbl, video:, audio:)
  fail Error, "cut needs resolution and fps (reorder your filters?)"  unless
    !video || (video.resolution && video.fps)

  # Trimming

  lbl_aux = "tm#{lbl}"
  super(lbl_aux, video: video, audio: audio) +
    if to
      lbl_blk = "bl#{lbl}"
      lbl_pad = "pd#{lbl}"
      [
        *((video && channel?(:video))?
          Filter.blank_source(to - from, video.resolution, video.fps, "#{lbl_blk}:v") +
          Filter.concat_v(["#{lbl_aux}:v", "#{lbl_blk}:v"], "#{lbl_pad}:v") +
          Filter.trim(from, to, "#{lbl_pad}:v", "#{lbl}:v")
          : nil),
        *((audio && channel?(:audio))?
          Filter.silent_source(to - from, "#{lbl_blk}:a") +
          Filter.concat_a(["#{lbl_aux}:a", "#{lbl_blk}:a"], "#{lbl_pad}:a") +
          Filter.atrim(from, to, "#{lbl_pad}:a", "#{lbl}:a")
          : nil)
      ]
    elsif from == 0
      [
        *((video && channel?(:video))? Filter.copy("#{lbl_aux}:v", "#{lbl}:v"): nil),
        *((audio && channel?(:audio))? Filter.anull("#{lbl_aux}:a", "#{lbl}:a"): nil)
      ]
    else  # !to
      [
        *((video && channel?(:video))? Filter.trim(from, nil, "#{lbl_aux}:v", "#{lbl}:v"): nil),
        *((audio && channel?(:audio))? Filter.atrim(from, nil, "#{lbl_aux}:a", "#{lbl}:a"): nil)
      ]
    end
end