Class: VTools::Thumbnailer

Inherits:
Object
  • Object
show all
Includes:
SharedMethods
Defined in:
lib/vtools/thumbnailer.rb

Overview

Takes care about generating thumbnails requires ffmpegthumbnailer

Instance Method Summary collapse

Methods included from SharedMethods

included

Methods included from SharedMethods::Common

#config, #fix_encoding, #generate_path, #hash_to_obj, #json_to_obj, #keys_to_sym, #log, #logger=, #network_call, #parse_json, #path_generator

Constructor Details

#initialize(video) ⇒ Thumbnailer

Returns a new instance of Thumbnailer.



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# File 'lib/vtools/thumbnailer.rb', line 10

def initialize video
  @video = video
end

Instance Method Details

#run ⇒ Object

thumbnailer job



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# File 'lib/vtools/thumbnailer.rb', line 15

def run

  options = @video.thumbs_options
  errors = []
  thumbs = []
  postfix = options[:postfix]
  @total = options[:thumb_count].to_i

  @output_file = "#{generate_path @video.name, "thumb"}/#{@video.name}_"
  command = "#{CONFIG[:thumb_binary]} -i '#{@video.path}' #{options} "

  # callback
  Hook.exec :before_thumb, @video, options

  # process cicle
  @total.times do |count|

    seconds = (options && options[:t]) || set_point(options || count)

    file = "#{@output_file}#{ postfix || (options && options[:t]) || count }.jpg"
    exec = "#{command} -t #{seconds} -o '#{file}' 2>&1"
    options = nil

    Open3.popen3(exec) do |stdin, stdout, stderr|
      lines = stdout.readlines.join(" ")
      VTools.fix_encoding lines
      # save thumb if no error
      if (error = lines).empty?
        thumbs << thumb = {:path => file, :offset => time_offset(seconds)}
        Hook.exec :in_thumb, @video, thumb # callbacks
      else
        errors << "#{error} (#{file})"
      end
    end
  end

  # callbacks
  if errors.empty?
    Hook.exec :thumb_success, @video, thumbs
  else
    errors = " Errors: #{errors.flatten.join(";").gsub(/\n/, ' ')}. "
    Hook.exec :thumb_error, @video, errors
    raise ProcessError, "Thumbnailer error: #{errors}" if thumbs.empty? && @total > 0
  end

  thumbs
end