Class: MencoderWrapper

Inherits:
Object
  • 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) 


104
105
106
 
# File 'lib/mencoder_wrapper.rb', line 104

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

.calculate_fulli_filename(to_here_final_file) ⇒ Object 



43
44
45
 
# 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.



49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
 
# 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
  
  dvd_start_offset = these_settings['dvd_start_offset'] # assume we prefer DVD timings which...we do :P
  raise 'EDL must have a dvd_start_offset, even if just 0.0 (or better yet, 0.28 is a common one), as we use this to translate from DVD to file times' unless dvd_start_offset
  dvd_start_offset = EdlParser.translate_string_to_seconds(dvd_start_offset)
  
  combined = EdlParser.convert_incoming_to_split_sectors these_settings, 0, dvd_start_offset, [], dvd_start_offset
  @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 += "mencoder #{partials.join(' ')} -o #{to_here_final_file} -ovc copy -oac copy\n"
  out += "@rem old DISABLED join way... 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 



26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# 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 



108
109
110
111
112
113
114
115
116
117
118
119
120
 
# File 'lib/mencoder_wrapper.rb', line 108

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