Class: VTools::Video

Inherits:
Object
  • Object
show all
Defined in:
lib/vtools/video.rb

Overview

Video instance

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ Video

Returns a new instance of Video.

Raises:



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# File 'lib/vtools/video.rb', line 26

def initialize path

  @invalid = true
  @uncertain_duration = true
  @convert_options  = {}
  @thumbs_options   = {}
  @path = set_path path

  path =~ /([^\/\\]+?)(\.\w+)?$/
  @name = $1

  raise FileError, "the file '#{@path}' does not exist" unless File.exists?(@path)

  @converter    = Converter.new self
  @thumbnailer  = Thumbnailer.new self
end

Instance Attribute Details

#audio_bitrate ⇒ Object (readonly)

Returns the value of attribute audio_bitrate.



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# File 'lib/vtools/video.rb', line 8

def audio_bitrate
  @audio_bitrate
end

#audio_codec ⇒ Object (readonly)

Returns the value of attribute audio_codec.



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# File 'lib/vtools/video.rb', line 8

def audio_codec
  @audio_codec
end

#audio_sample_rate ⇒ Object (readonly)

Returns the value of attribute audio_sample_rate.



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# File 'lib/vtools/video.rb', line 8

def audio_sample_rate
  @audio_sample_rate
end

#audio_stream ⇒ Object (readonly)

Returns the value of attribute audio_stream.



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# File 'lib/vtools/video.rb', line 8

def audio_stream
  @audio_stream
end

#bitrate ⇒ Object (readonly)

Returns the value of attribute bitrate.



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# File 'lib/vtools/video.rb', line 8

def bitrate
  @bitrate
end

#colorspace ⇒ Object (readonly)

Returns the value of attribute colorspace.



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# File 'lib/vtools/video.rb', line 8

def colorspace
  @colorspace
end

#convert_options ⇒ Object (readonly)

Returns the value of attribute convert_options.



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# File 'lib/vtools/video.rb', line 8

def convert_options
  @convert_options
end

#dar ⇒ Object (readonly)

Returns the value of attribute dar.



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# File 'lib/vtools/video.rb', line 8

def dar
  @dar
end

#duration ⇒ Object (readonly)

Returns the value of attribute duration.



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# File 'lib/vtools/video.rb', line 8

def duration
  @duration
end

#frame_rate ⇒ Object (readonly)

Returns the value of attribute frame_rate.



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# File 'lib/vtools/video.rb', line 8

def frame_rate
  @frame_rate
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/vtools/video.rb', line 8

def name
  @name
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/vtools/video.rb', line 8

def path
  @path
end

#resolution ⇒ Object (readonly)

Returns the value of attribute resolution.



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# File 'lib/vtools/video.rb', line 8

def resolution
  @resolution
end

#start ⇒ Object (readonly)

Returns the value of attribute start.



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# File 'lib/vtools/video.rb', line 8

def start
  @start
end

#thumbs_options ⇒ Object (readonly)

Returns the value of attribute thumbs_options.



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# File 'lib/vtools/video.rb', line 8

def thumbs_options
  @thumbs_options
end

#video_bitrate ⇒ Object (readonly)

Returns the value of attribute video_bitrate.



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# File 'lib/vtools/video.rb', line 8

def video_bitrate
  @video_bitrate
end

#video_codec ⇒ Object (readonly)

Returns the value of attribute video_codec.



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# File 'lib/vtools/video.rb', line 8

def video_codec
  @video_codec
end

#video_stream ⇒ Object (readonly)

Returns the value of attribute video_stream.



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# File 'lib/vtools/video.rb', line 8

def video_stream
  @video_stream
end

Instance Method Details

#audio_channels ⇒ Object

valid audio channels index



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# File 'lib/vtools/video.rb', line 133

def audio_channels
  return nil unless @audio_channels
  return @audio_channels[/\d*/].to_i if @audio_channels["channels"]
  return 1 if @audio_channels["mono"]
  return 2 if @audio_channels["stereo"]
  return 6 if @audio_channels["5.1"]
end

#calculated_aspect_ratio ⇒ Object

aspect ratio calculator



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# File 'lib/vtools/video.rb', line 117

def calculated_aspect_ratio
  if dar
    w, h = dar.split(":")
    w.to_f / h.to_f
  else
    aspect = width.to_f / height.to_f
    (aspect.nan? || aspect == 1.0/"x".to_f) ? nil : aspect
  end
end

#convert(setup = {}) ⇒ Object

convert video



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# File 'lib/vtools/video.rb', line 50

def convert setup = {}
  @convert_options = ConvertOptions.new(setup)
  @converter.run
end

#create_thumbs(setup = {}) ⇒ Object

generate thumbs



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# File 'lib/vtools/video.rb', line 44

def create_thumbs setup = {}
  @thumbs_options = ThumbsOptions.new setup.merge({:aspect => calculated_aspect_ratio})
  @thumbnailer.run
end

#get_info ⇒ Object

generate video informatioin



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# File 'lib/vtools/video.rb', line 56

def get_info

  stdin, stdout, stderr = Open3.popen3("#{CONFIG[:ffmpeg_binary]} -i '#{@path}'")
  # Output will land in stderr
  output = stderr.read
  VTools.fix_encoding output

  output[/Duration: (\d{2}):(\d{2}):(\d{2}\.\d{1})/]
  @duration = ($1.to_i*60*60) + ($2.to_i*60) + $3.to_f

  output[/start: (\d*\.\d*)/]
  @start = $1.to_f

  output[/bitrate: (\d*)/]
  @bitrate = $1.to_i || nil

  output[/Video: (.*)/]
  @video_stream = $1

  output[/Audio: (.*)/]
  @audio_stream = $1

  @uncertain_duration = true #output.include?("Estimating duration from bitrate, this may be inaccurate") || @start > 0

  if @video_stream
    @video_codec, @colorspace, resolution, video_bitrate = @video_stream.split(/\s?,\s?/)
    @video_bitrate = video_bitrate =~ %r(\A(\d+) kb/s\Z) ? $1.to_i : nil
    @resolution = resolution.split(" ").first rescue nil # get rid of [PAR 1:1 DAR 16:9]
    @dar = $1 if @video_stream[/DAR (\d+:\d+)/]
  end

  if @audio_stream
    @audio_codec, audio_sample_rate, @audio_channels, unused, audio_bitrate = @audio_stream.split(/\s?,\s?/)
    @audio_bitrate = audio_bitrate =~ %r(\A(\d+) kb/s\Z) ? $1.to_i : nil
    @audio_sample_rate = audio_sample_rate[/\d*/].to_i
  end

  @invalid = false unless @video_stream.to_s.empty?
  @invalid = true if output.include?("is not supported")

  self
end

#height ⇒ Object 



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# File 'lib/vtools/video.rb', line 112

def height
  resolution.split("x").last.to_i rescue nil
end

#size ⇒ Object

video file size



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# File 'lib/vtools/video.rb', line 128

def size
  File.size(@path)
end

#to_json(*args) ⇒ Object 



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# File 'lib/vtools/video.rb', line 14

def to_json(*args)
  ignore = [:@convert_options, :@thumbs_options, :@converter, :@thumbnailer, :@uncertain_duration, :invalid]

  hsh = instance_variables.inject({}) do |data, var|
    data[ var[1..-1] ] = instance_variable_get(var) unless ignore.include? var.to_sym
    data
  end

  hsh["valid"] = !@invalid
  hsh.to_json(*args)
end

#uncertain_duration? ⇒ Boolean

validate duration

Returns:

  • (Boolean) 


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# File 'lib/vtools/video.rb', line 104

def uncertain_duration?
  @uncertain_duration
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vtools/video.rb', line 99

def valid?
  not @invalid
end

#width ⇒ Object 



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# File 'lib/vtools/video.rb', line 108

def width
  resolution.split("x").first.to_i rescue nil
end