code.delx.au - transcoding/blob - encode.py

   1 #!/usr/bin/env python
   2
   3 import optparse
   4 import re
   5 import subprocess
   6 import sys
   7 import os
   8 import shutil
   9 import tempfile
  10
  11 class FatalException(Exception):
  12         pass
  13
  14 def mkarg(arg):
  15         if re.match("^[a-zA-Z0-9\-\\.,/@_:=]*$", arg):
  16                 return arg
  17
  18         if "'" not in arg:
  19                 return "'%s'" % arg
  20         out = "\""
  21         for c in arg:
  22                 if c in "\\$\"`":
  23                         out += "\\"
  24                 out += c
  25         out += "\""
  26         return out
  27
  28 def midentify(source, field):
  29         process = subprocess.Popen(
  30                 [
  31                         "mplayer", source,
  32                         "-ao", "null", "-vo", "null",
  33                         "-frames", "0", "-identify",
  34                 ],
  35                 stdout=subprocess.PIPE,
  36                 stderr=subprocess.PIPE,
  37         )
  38         for line in process.stdout:
  39                 try:
  40                         key, value = line.split("=")
  41                 except ValueError:
  42                         continue
  43                 if key == field:
  44                         return value.strip()
  45
  46
  47
  48 class Command(object):
  49         codec2exts = {
  50                 "xvid": "m4v",
  51                 "x264": "h264",
  52                 "faac": "aac",
  53                 "mp3lame": "mp3",
  54                 "copyac3": "ac3",
  55         }
  56
  57         def __init__(self, profile, opts):
  58                 self.profile = profile
  59                 self.opts = opts
  60                 self.init()
  61                 self.audio_tmp = "audio." + self.codec2exts[profile.acodec]
  62                 self.video_tmp = "video." + self.codec2exts[profile.vcodec]
  63
  64         def init(self):
  65                 pass
  66
  67         def print_install_message(self):
  68                 print >>sys.stderr, "Problem with command: %s", self.name
  69                 if self.package:
  70                         print >>sys.stderr, "Try running:\n# aptitude install %s", self.package
  71
  72         def check_command(self, cmd):
  73                 if self.opts.dump:
  74                         return
  75                 if subprocess.Popen(["which", cmd], stdout=open("/dev/null", "w")).wait() != 0:
  76                         raise FatalException("Command '%s' is required" % cmd)
  77
  78         def check_no_file(self, path):
  79                 if os.path.exists(path):
  80                         raise FatalException("Output file '%s' exists." % path)
  81
  82         def do_exec(self, args):
  83                 if self.opts.dump:
  84                         print " ".join(map(mkarg, args))
  85                 else:
  86                         if subprocess.Popen(args).wait() != 0:
  87                                 raise FatalException("Failure executing command: %s" % args)
  88
  89
  90 class MP4Box(Command):
  91         def check(self):
  92                 self.check_command("MP4Box")
  93                 self.check_no_file(self.opts.output + ".mp4")
  94
  95         def run(self):
  96                 if self.opts.dump:
  97                         fps = "???"
  98                 else:
  99                         fps = midentify(self.video_tmp, "ID_VIDEO_FPS")
 100
 101                 output = self.opts.output + ".mp4"
 102                 self.do_exec([
 103                         "MP4Box",
 104                         "-fps", fps,
 105                         "-add", self.video_tmp,
 106                         "-add", self.audio_tmp,
 107                         output
 108                 ])
 109
 110
 111
 112 class MKVMerge(Command):
 113         def check(self):
 114                 self.check_command("mkvmerge")
 115                 self.check_no_file(self.opts.output + ".mkv")
 116
 117         def run(self):
 118                 if self.opts.dump:
 119                         fps = "???"
 120                 else:
 121                         fps = midentify(self.video_tmp, "ID_VIDEO_FPS")
 122
 123                 self.do_exec([
 124                         "mkvmerge",
 125                         "-o", self.opts.output + ".mkv",
 126                         "--default-duration", "0:%sfps"%fps,
 127                         self.video_tmp,
 128                         self.audio_tmp,
 129                 ])
 130
 131
 132
 133 class MencoderMux(Command):
 134         def check(self):
 135                 self.check_command("mencoder")
 136                 self.check_no_file(self.opts.output + ".avi")
 137
 138         def run(self):
 139                 self.do_exec([
 140                         "mencoder",
 141                         "-o", self.opts.output + ".avi",
 142                         "-oac", "copy", "-ovc", "copy",
 143                         "-noskip", "-mc", "0",
 144                         "-audiofile", self.audio_tmp,
 145                         self.video_tmp,
 146                 ])
 147
 148
 149
 150 class Mencoder(Command):
 151         codec2opts = {
 152                 "xvid": "-xvidencopts",
 153                 "x264": "-x264encopts",
 154                 "faac": "-faacopts",
 155                 "mp3lame": "-lameopts",
 156         }
 157
 158         def init(self):
 159                 if self.opts.copyac3:
 160                         self.profile.acodec = "copyac3"
 161                         self.profile.aopts = None
 162
 163         def insert_options(self, cmd):
 164                 def try_opt(opt, var):
 165                         if var is not None:
 166                                 cmd.append(opt)
 167                                 cmd.append(var)
 168                 if self.opts.deinterlace:
 169                         cmd += ["-vf-add", "pp=lb"]
 170                 if self.opts.detelecine:
 171                         self.opts.ofps = "24000/1001"
 172                         cmd += ["-vf-add", "pullup,softskip"]
 173                 if self.opts.copyac3:
 174                         cmd += ["-noskip", "-mc", "0"]
 175                 try_opt("-fps", self.opts.ifps)
 176                 try_opt("-ofps", self.opts.ofps)
 177                 try_opt("-ss", self.opts.startpos)
 178                 try_opt("-endpos", self.opts.endpos)
 179                 try_opt("-dvd-device", self.opts.dvd)
 180                 try_opt("-chapter", self.opts.chapter)
 181                 try_opt("-aid", self.opts.audioid)
 182                 try_opt("-sid", self.opts.subtitleid)
 183                 try_opt("-vf-add", self.opts.vfilters)
 184                 try_opt("-af-add", self.opts.afilters)
 185                 cmd += ["-vf-add", "harddup"]
 186
 187         def subst_values(self, cmd, vpass):
 188                 subst = {
 189                         "vbitrate": self.opts.vbitrate,
 190                         "abitrate": self.opts.abitrate,
 191                         "vpass": vpass,
 192                 }
 193
 194                 return [x % subst for x in cmd]
 195
 196         def passn(self, n):
 197                 p = self.profile
 198
 199                 acodec = p.acodec
 200                 if acodec == "copyac3":
 201                         if n == 1:
 202                                 acodec = "copy"
 203                         else:
 204                                 # Hack to stop x264 crashing
 205                                 acodec = "mp3lame"
 206
 207                 cmd = []
 208                 cmd += ["mencoder", self.opts.input]
 209                 self.insert_options(cmd)
 210                 cmd += ["-ovc", p.vcodec, self.codec2opts[p.vcodec], p.vopts]
 211                 cmd += ["-oac", acodec]
 212                 if p.aopts:
 213                         cmd += [self.codec2opts[p.acodec], p.aopts]
 214                 cmd += self.profile.extra1 + self.profile.extra
 215                 cmd = self.subst_values(cmd, vpass=n)
 216
 217                 return cmd
 218
 219
 220         def pass1(self):
 221                 cmd = self.passn(1)
 222                 cmd += ["-o", self.audio_tmp, "-of", "rawaudio"]
 223                 return cmd
 224
 225         def pass2(self):
 226                 cmd = self.passn(2)
 227                 cmd += ["-o", self.video_tmp, "-of", "rawvideo"]
 228                 return cmd
 229
 230         def check(self):
 231                 self.check_command("mencoder")
 232                 self.check_no_file(self.audio_tmp)
 233                 self.check_no_file(self.video_tmp)
 234
 235         def run(self):
 236                 self.do_exec(self.pass1())
 237                 self.do_exec(self.pass2())
 238
 239
 240
 241 class Profile(object):
 242         def __init__(self, commands, **kwargs):
 243                 self.default_opts = {
 244                         "vbitrate": 1000,
 245                         "abitrate": 192,
 246                 }
 247                 self.extra = []
 248                 self.extra1 = []
 249                 self.extra2 = []
 250                 self.commands = commands
 251                 self.__dict__.update(kwargs)
 252
 253         def __contains__(self, keyname):
 254                 return hasattr(self, keyname)
 255
 256
 257 profiles = {
 258         "x264" :
 259         Profile(
 260                 commands=[Mencoder, MKVMerge],
 261                 vcodec="x264",
 262                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:subq=6:frameref=6:me=umh:partitions=all:bframes=4:b_adapt:qcomp=0.7:keyint=250",
 263                 acodec="mp3lame",
 264                 aopts="abr:br=%(abitrate)d",
 265         ),
 266
 267         "xvid" :
 268         Profile(
 269                 commands=[Mencoder, MencoderMux],
 270                 vcodec="xvid",
 271                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vhq=4:autoaspect",
 272                 acodec="mp3lame",
 273                 aopts="abr:br=%(abitrate)d",
 274         ),
 275
 276         "apple-quicktime" :
 277         Profile(
 278                 commands=[Mencoder, MP4Box],
 279                 vcodec="x264",
 280                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:me=umh:partitions=all:trellis=1:subq=7:bframes=1:direct_pred=auto",
 281                 acodec="faac",
 282                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 283         ),
 284
 285         "ipod-xvid" :
 286         Profile(
 287                 commands=[Mencoder, MP4Box],
 288                 vcodec="xvid",
 289                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vhq=4:autoaspect:max_bframes=0",
 290                 acodec="faac",
 291                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 292                 extra=["-vf-add", "scale=480:-10"],
 293         ),
 294
 295         "ipod-x264" :
 296         Profile(
 297                 commands=[Mencoder, MP4Box],
 298                 vcodec="x264",
 299                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vbv_maxrate=1500:vbv_bufsize=2000:nocabac:me=umh:partitions=all:trellis=1:subq=7:bframes=0:direct_pred=auto:level_idc=30:turbo",
 300                 acodec="faac",
 301                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 302                 extra=["-vf-add", "scale=480:-10"],
 303                 extra2=["-channels", "2", "-srate", "48000"],
 304         ),
 305
 306         "nokia-n97" :
 307         Profile(
 308                 commands=[Mencoder, MP4Box],
 309                 default_opts={
 310                         "vbitrate": 256,
 311                         "abitrate": 64,
 312                 },
 313                 vcodec="xvid",
 314                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vhq=4:autoaspect:max_bframes=0",
 315                 acodec="faac",
 316                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 317                 extra=["-vf-add", "scale=640:-10"],
 318         ),
 319 }
 320
 321
 322
 323
 324 def parse_args():
 325         for profile_name in profiles.keys():
 326                 if sys.argv[0].find(profile_name) >= 0:
 327                         break
 328         else:
 329                 profile_name = "xvid"
 330
 331         parser = optparse.OptionParser(usage="%prog [options] input [output]")
 332         parser.add_option("--dvd", action="store", dest="dvd")
 333         parser.add_option("--deinterlace", action="store_true", dest="deinterlace")
 334         parser.add_option("--detelecine", action="store_true", dest="detelecine")
 335         parser.add_option("--copyac3", action="store_true", dest="copyac3")
 336         parser.add_option("--vfilters", action="store", dest="vfilters")
 337         parser.add_option("--afilters", action="store", dest="afilters")
 338         parser.add_option("--vbitrate", action="store", dest="vbitrate", type="int")
 339         parser.add_option("--abitrate", action="store", dest="abitrate", type="int")
 340         parser.add_option("--chapter", action="store", dest="chapter")
 341         parser.add_option("--ifps", action="store", dest="ifps")
 342         parser.add_option("--ofps", action="store", dest="ofps")
 343         parser.add_option("--startpos", action="store", dest="startpos")
 344         parser.add_option("--endpos", action="store", dest="endpos")
 345         parser.add_option("--audioid", action="store", dest="audioid")
 346         parser.add_option("--subtitleid", action="store", dest="subtitleid")
 347         parser.add_option("--profile", action="store", dest="profile_name", default=profile_name)
 348         parser.add_option("--dump", action="store_true", dest="dump")
 349         try:
 350                 opts, args = parser.parse_args(sys.argv[1:])
 351                 if len(args) == 1:
 352                         input = args[0]
 353                         output = os.path.splitext(os.path.basename(input))[0]
 354                 elif len(args) == 2:
 355                         input, output = args
 356                 else:
 357                         raise ValueError
 358         except Exception:
 359                 parser.print_usage()
 360                 sys.exit(1)
 361
 362         if "://" not in input:
 363                 opts.input = os.path.abspath(input)
 364         else:
 365                 if opts.dvd:
 366                         opts.dvd = os.path.abspath(opts.dvd)
 367                 opts.input = input
 368
 369         opts.output = os.path.abspath(output)
 370
 371         return opts
 372
 373 def main():
 374         os.nice(1)
 375
 376         opts = parse_args()
 377
 378         # Find our profile
 379         try:
 380                 profile = profiles[opts.profile_name]
 381         except KeyError:
 382                 print >>sys.stderr, "Profile '%s' not found!" % opts.profile_name
 383                 sys.exit(1)
 384
 385         # Pull in default option values from the profile
 386         for key, value in profile.default_opts.iteritems():
 387                 if getattr(opts, key) is None:
 388                         setattr(opts, key, value)
 389
 390         # Run in a temp dir so that multiple instances can be run simultaneously
 391         tempdir = tempfile.mkdtemp()
 392         try:
 393                 os.chdir(tempdir)
 394
 395                 try:
 396                         commands = []
 397                         for CommandClass in profile.commands:
 398                                 command = CommandClass(profile, opts)
 399                                 commands.append(command)
 400                                 command.check()
 401                         for command in commands:
 402                                 command.run()
 403
 404                 except FatalException, e:
 405                         print >>sys.stderr, "Error:", str(e)
 406                         sys.exit(1)
 407
 408         finally:
 409                 os.chdir("/")
 410                 shutil.rmtree(tempdir)
 411
 412 if __name__ == "__main__":
 413         main()
 414