Class: Av::Commands::Ffmpeg

Inherits:
Base
  • Object
show all
Defined in:
lib/av/commands/ffmpeg.rb

Instance Attribute Summary

Attributes inherited from Base

#audio_filters, #command_name, #default_params, #destination, #input_params, #options, #output_format, #output_params, #source, #video_filters

Instance Method Summary collapse

Methods inherited from Base

#add_destination, #add_input_param, #add_output_param, #add_source, #identify, #parse_param, #reset_default_filters, #reset_input_filters, #reset_output_filters, #run, #set_input_params, #set_output_params

Constructor Details

#initialize(options = {}) ⇒ Ffmpeg

Returns a new instance of Ffmpeg.



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# File 'lib/av/commands/ffmpeg.rb', line 8

def initialize(options = {})
  super(options)
  @command_name = "ffmpeg"
  # TODO handle quite for ffmpeg
end

Instance Method Details

#filter_concat(list) ⇒ Object 



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# File 'lib/av/commands/ffmpeg.rb', line 14

def filter_concat list
  index_file = Tempfile.new('ffmpeg-concat')
  File.open(index_file, 'w') do |file|
    list.each do |item|
      file.write("file '#{item}'\n")
    end
  end
  add_input_param concat: "-i #{index_file.path}"
  self
end

#filter_rotate(degrees) ⇒ Object

Raises:



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# File 'lib/av/commands/ffmpeg.rb', line 30

def filter_rotate degrees
  raise ::Av::InvalidFilterParameter unless degrees % 90 == 0
  case degrees
    when 90
      add_input_param vf: 'transpose=1'
    when 180
      add_input_param vf: 'vflip,hflip'
    when 270
      add_input_param vf: 'transpose=2'
  end
  self
end

#filter_volume(vol) ⇒ Object 



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# File 'lib/av/commands/ffmpeg.rb', line 25

def filter_volume vol
  add_input_param af: "volume=#{vol}"
  self
end