Class: MencoderWrapper

Inherits:
Object show all
Defined in:
lib/mencoder_wrapper.rb

Defined Under Namespace

Classes: TimingError

Class Method Summary collapse

Class Method Details

.am_on_developer_machine? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mencoder_wrapper.rb', line 99

def am_on_developer_machine?
  Socket.gethostname =~ /roger|pack/i
end

.calculate_fulli_filename(to_here_final_file) ⇒ Object 



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# File 'lib/mencoder_wrapper.rb', line 43

def calculate_fulli_filename to_here_final_file
  @big_temp_fulli = to_here_final_file + ".fulli_unedited.tmp.mpg"
end

.get_bat_commands(these_settings, this_from_file, to_here_final_file, start_here = nil, end_here = nil, dvd_title_track = "1", delete_partials = false, require_deletion_entry = false) ⇒ Object

called from the UI… only for transcoding.



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# File 'lib/mencoder_wrapper.rb', line 49

def get_bat_commands these_settings, this_from_file, to_here_final_file, start_here = nil, end_here = nil, dvd_title_track = "1", delete_partials = false, require_deletion_entry = false
  combined = EdlParser.convert_incoming_to_split_sectors these_settings
  @dvd_title_track = dvd_title_track
  assert dvd_title_track
  if start_here || end_here
    raise 'need both end and start' unless end_here && start_here
    start_here = EdlParser.translate_string_to_seconds(start_here)
    end_here   = EdlParser.translate_string_to_seconds(end_here)
    combined.select!{|start, endy, type| start > start_here && endy < end_here }
    raise TimingError.new("unable to find deletion entry between #{start_here} and #{end_here}") if require_deletion_entry && combined.length == 0
    # it's relative now, since we rip from not the beginning
    previous_end = start_here
  else
    previous_end = 0
  end
  calculate_fulli_filename to_here_final_file
  out = get_header this_from_file, these_settings
  @idx = 0
  combined.each {|start, endy, type|
    if start > previous_end
      out += get_section previous_end, start, false, to_here_final_file
    end
    # type is either mute or :blank or :mute
    if type == :blank
     # do nothing... clip will be skipped
    else
      out += get_section start, endy, true, to_here_final_file
    end
    previous_end = endy
  }
  # trailer
  out += get_section previous_end, end_here || 1_000_000, false, to_here_final_file
  partials = (1..@idx).map{|n| "#{to_here_final_file}.#{n}.avi"}
  to_here_final_file = to_here_final_file + ".avi"
  if File.exist? to_here_final_file
    p 'warning, overwriting+deleting previous ' + to_here_final_file
    FileUtils.rm to_here_final_file # raises on deletion failure...which is what we want I think...typically...early warning...
  end
  out += "call mencoder #{partials.join(' ')} -o #{to_here_final_file} -ovc copy -oac copy\n"
  out += "@rem old DISABLED join way... call mencoder -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd:tsaf -vf scale=720:480,harddup -srate 48000 -af lavcresample=48000 -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:keyint=18:vstrict=0:acodec=ac3:abitrate=192:aspect=16/9 -ofps 30000/1001  #{partials.join(' ')} -o #{to_here_final_file}\n"
  
  delete_prefix = delete_partials ? "" : "@rem "
  delete_prefix = "@rem" if am_on_developer_machine? # for ease of double checking...

  out += "#{delete_prefix} del #{@big_temp_fulli}\n"
  out += "#{delete_prefix} del " + partials.join(' ') + "\n"
  out += "echo wrote (probably successfully) to #{to_here_final_file}"
  out
end

.get_header(this_file, these_settings) ⇒ Object 



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# File 'lib/mencoder_wrapper.rb', line 26

def get_header this_file, these_settings
  out = ''
  if File.exist?(@big_temp_fulli) && File.exist?(@big_temp_fulli + '.done')
    out = '@rem ' # don't re-do this file if .done file already exists...
  end
  audio_codec = these_settings['audio_codec'] || 'mp3lame' # not copy...sniff...or you can't hear cars... LODO
  # LODO do I need mp3lame for sintel, or can I get away with lavc? will it work overall currently?
  # -vf pullup,softskip "fixes" freaky mixed DVD's, or so they tell me...
  # harddup is "to create a DVD compliant" video which...I think I don't need...but DVD players require it...
  #   "This will result in a slightly bigger file, but will not cause problems when demuxing or remuxing into other container formats." LODO no harddup ok ???
  # lodo: can I use ffmpeg to unmux-ify/GOP'ify perhaps?
  # LODO 24000/1001 ?
  # -vf pullup,softskip for DVD's that mix progressive and something something [some of them]...whatever it even really means :P
  video_opts = "-vf scale=720:480,pullup,softskip,harddup -forceidx -ovc lavc -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:keyint=1:vstrict=0:acodec=ac3:abitrate=192:autoaspect -ofps 30000/1001"
  out += "mencoder \"#{this_file.gsub('"', '\\"')}\" -of mpeg -mpegopts format=dvd:tsaf -alang en -nocache -sid 1000 -oac #{audio_codec} #{video_opts} -o #{@big_temp_fulli} -dvd-device #{this_file} && echo done_grabbing > #{@big_temp_fulli}.done\n"
end

.get_section(start, endy, should_mute, to_here_final_file) ⇒ Object 



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# File 'lib/mencoder_wrapper.rb', line 103

def get_section start, endy, should_mute, to_here_final_file    
  raise 'start == end' if start == endy # should never actually happen...
  # delete 0.001 as per wiki's suggestion.
  endy = endy - start - 0.001
  # very decreased volume is like muting :)
  # LODO can we copy more here? ntsc-dvd supposedly remuxes...
  codecs = should_mute ? "-vcodec copy -acodec ac3 -vol 0 " : "-vcodec copy -acodec copy " # LODO the ac3 must match the other copy codec ?
  partial_filename = to_here_final_file + '.' + (@idx += 1).to_s + '.avi'
  if File.exist? partial_filename
    FileUtils.rm partial_filename
  end
  "ffmpeg -i #{@big_temp_fulli} #{codecs} -ss #{start} -t #{endy} #{partial_filename}\n"
end