Class: Ffmprb::Process::Input

Inherits:
Object
  • Object
show all
Defined in:
lib/ffmprb/process/input.rb

Direct Known Subclasses

Cropped, Cut, Loud

Defined Under Namespace

Classes: Cropped, Cut, Loud

Instance Method Summary collapse

Constructor Details

#initialize(io, only: nil) ⇒ Input

Returns a new instance of Input.

Raises:



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# File 'lib/ffmprb/process/input.rb', line 128

def initialize(io, only: nil)
  @io = resolve(io)
  @channels = [*only]
  @channels = nil  if @channels.empty?
  raise Error, "Inadequate A/V channels"  if
    [:video, :audio].any?{|medium| !@io.channel?(medium) && channel?(medium, true)}
end

Instance Method Details

#audio ⇒ Object 



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# File 'lib/ffmprb/process/input.rb', line 170

def audio
  Input.new self, only: :audio
end

#channel?(medium, force = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ffmprb/process/input.rb', line 190

def channel?(medium, force=false)
  return !!@channels && @channels.include?(medium) && @io.channel?(medium)  if force

  (!@channels || @channels.include?(medium)) && @io.channel?(medium)
end

#crop(ratio) ⇒ Object

NOTE ratio is either a CROP_PARAMS symbol-ratio hash or a single (global) ratio



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# File 'lib/ffmprb/process/input.rb', line 174

def crop(ratio)  # NOTE ratio is either a CROP_PARAMS symbol-ratio hash or a single (global) ratio
  Cropped.new self, crop: ratio
end

#cut(from: 0, to: nil) ⇒ Object 



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# File 'lib/ffmprb/process/input.rb', line 178

def cut(from: 0, to: nil)
  Cut.new self, from: from, to: to
end

#filters_for(lbl, process:, output:, video: true, audio: true) ⇒ Object 



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# File 'lib/ffmprb/process/input.rb', line 140

def filters_for(lbl, process:, output:, video: true, audio: true)

  # Channelling

  if @io.respond_to?(:filters_for)
    lbl_aux = "au#{lbl}"
    @io.filters_for(lbl_aux, process: process, output: output, video: video, audio: audio) +
      [
        *((video && @io.channel?(:video))?
          (channel?(:video)? Filter.copy("#{lbl_aux}:v", "#{lbl}:v"): Filter.nullsink("#{lbl_aux}:v")):
          nil),
        *((audio && @io.channel?(:audio))?
          (channel?(:audio)? Filter.anull("#{lbl_aux}:a", "#{lbl}:a"): Filter.anullsink("#{lbl_aux}:a")):
          nil)
      ]
  else
    in_lbl = process[self]
    raise Error, "Data corruption"  unless in_lbl
    [
      # XXX this fixup is temporary, leads to resolution loss on crop etc... *(video && @io.channel?(:video) && channel?(:video)? Filter.copy("#{in_lbl}:v", "#{lbl}:v"): nil),
      *(video && @io.channel?(:video) && channel?(:video)? Filter.scale_pad_fps(output.target_width, output.target_height, output.target_fps, "#{in_lbl}:v", "#{lbl}:v"): nil),
      *(audio && @io.channel?(:audio) && channel?(:audio)? Filter.anull("#{in_lbl}:a", "#{lbl}:a"): nil)
    ]
  end
end

#mute ⇒ Object 



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# File 'lib/ffmprb/process/input.rb', line 182

def mute
  Loud.new self, volume: 0
end

#options ⇒ Object 



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# File 'lib/ffmprb/process/input.rb', line 136

def options
  ['-i', @io.path]
end

#video ⇒ Object 



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# File 'lib/ffmprb/process/input.rb', line 166

def video
  Input.new self, only: :video
end

#volume(vol) ⇒ Object 



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# File 'lib/ffmprb/process/input.rb', line 186

def volume(vol)
  Loud.new self, volume: vol
end