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