class FFMPEG::Transcoder
Public Class Methods
new(movie, output_file, options = EncodingOptions.new, transcoder_options = {})
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# File lib/ffmpeg/transcoder.rb, line 16 def initialize(movie, output_file, options = EncodingOptions.new, transcoder_options = {}) @movie = movie @output_file = output_file FFMPEG.logger.level = Logger::INFO if options.is_a?(String) || options.is_a?(EncodingOptions) @raw_options = options elsif options.is_a?(Hash) FFMPEG.logger.level = Logger::ERROR if options[:silent] @raw_options = EncodingOptions.new(options) else raise ArgumentError, "Unknown options format '#{options.class}', should be either EncodingOptions, Hash or String." end @transcoder_options = transcoder_options @errors = [] apply_transcoder_options end
timeout()
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# File lib/ffmpeg/transcoder.rb, line 12 def self.timeout @@timeout end
timeout=(time)
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# File lib/ffmpeg/transcoder.rb, line 8 def self.timeout=(time) @@timeout = time end
Public Instance Methods
encoded()
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# File lib/ffmpeg/transcoder.rb, line 53 def encoded @encoded ||= Movie.new(@output_file) end
encoding_succeeded?()
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# File lib/ffmpeg/transcoder.rb, line 47 def encoding_succeeded? @errors << "no output file created" and return false unless File.exist?(@output_file) @errors << "encoded file is invalid" and return false unless encoded.valid? true end
run(&block)
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# File lib/ffmpeg/transcoder.rb, line 37 def run(&block) transcode_movie(&block) if @transcoder_options[:validate] validate_output_file(&block) return encoded else return nil end end
Private Instance Methods
apply_transcoder_options()
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# File lib/ffmpeg/transcoder.rb, line 105 def apply_transcoder_options # if true runs #validate_output_file @transcoder_options[:validate] = @transcoder_options.fetch(:validate) { true } return if @movie.calculated_aspect_ratio.nil? case @transcoder_options[:preserve_aspect_ratio].to_s when "width" new_height = @raw_options.width / @movie.calculated_aspect_ratio new_height = new_height.ceil.even? ? new_height.ceil : new_height.floor new_height += 1 if new_height.odd? # needed if new_height ended up with no decimals in the first place @raw_options[:resolution] = "#{@raw_options.width}x#{new_height}" when "height" new_width = @raw_options.height * @movie.calculated_aspect_ratio new_width = new_width.ceil.even? ? new_width.ceil : new_width.floor new_width += 1 if new_width.odd? @raw_options[:resolution] = "#{new_width}x#{@raw_options.height}" end end
fix_encoding(output)
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# File lib/ffmpeg/transcoder.rb, line 124 def fix_encoding(output) output[/test/] rescue ArgumentError output.force_encoding("ISO-8859-1") end
transcode_movie() { |0| ... }
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frame= 4855 fps= 46 q=31.0 size= 45306kB time=00:02:42.28 bitrate=2287.0kbits/
# File lib/ffmpeg/transcoder.rb, line 59 def transcode_movie @command = "#{FFMPEG.ffmpeg_binary} -y -i #{Shellwords.escape(@movie.path)} #{@raw_options} #{Shellwords.escape(@output_file)}" FFMPEG.logger.info("Running transcoding...\n#{@command}\n") @output = "" Open3.popen3(@command) do |_stdin, _stdout, stderr, wait_thr| begin yield(0.0) if block_given? next_line = Proc.new do |line| fix_encoding(line) @output << line if line.include?("time=") if line =~ /time=(\d+):(\d+):(\d+.\d+)/ # ffmpeg 0.8 and above style time = ($1.to_i * 3600) + ($2.to_i * 60) + $3.to_f else # better make sure it wont blow up in case of unexpected output time = 0.0 end progress = time / @movie.duration yield(progress) if block_given? end end if @@timeout stderr.each_with_timeout(wait_thr.pid, @@timeout, 'size=', &next_line) else stderr.each('size=', &next_line) end rescue Timeout::Error => e FFMPEG.logger.error "Process hung...\n@command\n#{@command}\nOutput\n#{@output}\n" raise Error, "Process hung. Full output: #{@output}" end end end
validate_output_file() { |0| ... }
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# File lib/ffmpeg/transcoder.rb, line 94 def validate_output_file(&block) if encoding_succeeded? yield(1.0) if block_given? FFMPEG.logger.info "Transcoding of #{@movie.path} to #{@output_file} succeeded\n" else errors = "Errors: #{@errors.join(", ")}. " FFMPEG.logger.error "Failed encoding...\n#{@command}\n\n#{@output}\n#{errors}\n" raise Error, "Failed encoding.#{errors}Full output: #{@output}" end end