Class: ActiveJob::Ffmpeg::Encoder::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/active_job/ffmpeg/encoder/base.rb

Direct Known Subclasses

MP4, WebM

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Base

Returns a new instance of Base.

Raises:

  • (ArgumentError) 


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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 12

def initialize(options = {})
  raise ArgumentError unless options.is_a?(Hash)
  merged_options = preset_options.merge(options)
  @size              = merged_options[:size]
  @aspect            = merged_options[:aspect]
  @video_bitrate     = merged_options[:video_bitrate]
  @audio_bitrate     = merged_options[:audio_bitrate]
  @audio_sample_rate = merged_options[:audio_sample_rate]
  @other_options     = merged_options[:other_options]
end

Instance Attribute Details

#audio_bitrate ⇒ Object (readonly)

Returns the value of attribute audio_bitrate.



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 8

def audio_bitrate
  @audio_bitrate
end

#audio_sample_rate ⇒ Object (readonly)

Returns the value of attribute audio_sample_rate.



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 8

def audio_sample_rate
  @audio_sample_rate
end

#input_filename ⇒ Object (readonly)

Returns the value of attribute input_filename.



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 9

def input_filename
  @input_filename
end

#on_complete ⇒ Object

Returns the value of attribute on_complete.



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 10

def on_complete
  @on_complete
end

#on_progress ⇒ Object

Returns the value of attribute on_progress.



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 10

def on_progress
  @on_progress
end

#other_options ⇒ Object (readonly)

Returns the value of attribute other_options.



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 8

def other_options
  @other_options
end

#output_filename ⇒ Object (readonly)

Returns the value of attribute output_filename.



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 9

def output_filename
  @output_filename
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 8

def size
  @size
end

#video_bitrate ⇒ Object (readonly)

Returns the value of attribute video_bitrate.



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 8

def video_bitrate
  @video_bitrate
end

Instance Method Details

#acodec ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 35

def acodec
  raise NotImplementedError
end

#aspect(filename = nil) ⇒ Object 



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 39

def aspect(filename = nil)
  @aspect || Ffmpeg.get_aspect(filename)
end

#do_encode(input, output) ⇒ Object 



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 53

def do_encode(input, output)
  @input_filename = input
  @output_filename = output
  cmd = %W(#{Ffmpeg.ffmpeg_cmd} -y -i #{@input_filename} -f #{format} -s #{size} -aspect #{aspect(@input_filename)} -vcodec #{vcodec} -b:v #{video_bitrate} -acodec #{acodec} -ar #{audio_sample_rate} -b:a #{audio_bitrate})
  cmd.concat(other_options.split(" "))
  cmd.reject!(&:empty?)
  cmd << @output_filename

  if ENV["DEBUG"]
    Ffmpeg.logger.debug(cmd.map(&:shellescape).join(" "))
  end

  duration = nil
  time = nil
  progress = nil

  Open3.popen3(*cmd) do |stdin, stdout, stderr, wait_th|
    while line = stderr.gets("\r")
      if line =~ /Duration:(\s.?(\d*):(\d*):(\d*)\.(\d*))/
        duration = $2.to_i * 3600 + $3.to_i * 60 + $4.to_i
      end

      if line =~ /frame=.*time=(\s*(\d*):(\d*):(\d*)\.(\d*))/
        time = $2.to_i * 3600 + $3.to_i * 60 + $4.to_i
      end

      if duration && time
        progress = (time / duration.to_f)
        on_progress.call(progress) if on_progress
      end
    end

    wait_th.join
  end

  on_complete.call(self) if on_complete
end

#format ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 27

def format
  raise NotImplementedError
end

#preset_options ⇒ Object 



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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 23

def preset_options
  {}
end

#vcodec ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/active_job/ffmpeg/encoder/base.rb', line 31

def vcodec
  raise NotImplementedError
end