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

   1 #!/usr/bin/env python
   2
   3 import commands
   4 import optparse
   5 import subprocess
   6 import sys
   7 import os
   8 import tempfile
   9 import shutil
  10
  11 class FatalException(Exception):
  12         pass
  13
  14 class Command(object):
  15         def __init__(self, profile, opts):
  16                 self.profile = profile
  17                 self.opts = opts
  18
  19         def print_install_message(self):
  20                 print >>sys.stderr, "Problem with command: %s", self.name
  21                 if self.package:
  22                         print >>sys.stderr, "Try running:\n# aptitude install %s", self.package
  23
  24         def check_command(self, cmd):
  25                 if self.opts.dump:
  26                         return
  27                 if subprocess.Popen(["which", cmd], stdout=open("/dev/null", "w")).wait() != 0:
  28                         raise FatalException("Command '%s' is required" % cmd)
  29
  30         def check_no_file(self, path):
  31                 if os.path.exists(path):
  32                         raise FatalException("Output file '%s' exists." % path)
  33
  34         def do_exec(self, args):
  35                 if self.opts.dump:
  36                         print "".join(map(commands.mkarg, args))[1:]
  37                 else:
  38                         if subprocess.Popen(args).wait() != 0:
  39                                 raise FatalException("Failure executing command: %s" % args)
  40
  41
  42 class MP4Box(Command):
  43         codec2exts = {
  44                 "xvid": "m4v",
  45                 "x264": "h264",
  46                 "faac": "aac",
  47         }
  48
  49         def check(self):
  50                 self.check_command("mencoder")
  51                 self.check_command("MP4Box")
  52                 self.check_no_file(self.opts.output + ".mp4")
  53
  54         def run(self):
  55                 p = self.profile
  56                 video = "video.%s" % self.codec2exts[p.vcodec]
  57                 audio = "audio.%s" % self.codec2exts[p.acodec]
  58                 input = self.opts.output + ".avi" # From Mencoder command
  59                 output = self.opts.output + ".mp4"
  60                 mencoder = ["mencoder", input, "-ovc", "copy", "-oac", "copy", "-of"]
  61                 self.do_exec(["rm", "-f", output])
  62                 self.do_exec(mencoder + ["rawvideo", "-o", video])
  63                 self.do_exec(mencoder + ["rawaudio", "-o", audio])
  64                 self.do_exec(["MP4Box", "-add", video, "-add", audio, output])
  65                 self.do_exec(["rm", "-f", video, audio, input])
  66
  67
  68 class Mencoder(Command):
  69         codec2opts = {
  70                 "lavc": "-lavcopts",
  71                 "xvid": "-xvidencopts",
  72                 "x264": "-x264encopts",
  73                 "faac": "-faacopts",
  74                 "mp3lame": "-lameopts",
  75         }
  76
  77         def insert_options(self, cmd):
  78                 def try_opt(opt, var):
  79                         if var is not None:
  80                                 cmd.append(opt)
  81                                 cmd.append(var)
  82                 if self.opts.deinterlace:
  83                         cmd += ["-vf-add", "pp=lb"]
  84                 try_opt("-ss", self.opts.startpos)
  85                 try_opt("-endpos", self.opts.endpos)
  86                 try_opt("-dvd-device", self.opts.dvd)
  87                 try_opt("-chapter", self.opts.chapter)
  88                 try_opt("-aid", self.opts.audioid)
  89                 try_opt("-sid", self.opts.subtitleid)
  90                 try_opt("-vf-add", self.opts.vfilters)
  91                 try_opt("-af", self.opts.afilters)
  92
  93         def subst_values(self, cmd, vpass):
  94                 subst = {
  95                         "vbitrate": self.opts.vbitrate,
  96                         "abitrate": self.opts.abitrate,
  97                         "input": self.opts.input,
  98                         "output": self.opts.output + ".avi",
  99                         "vpass": vpass,
 100                 }
 101
 102                 return [x % subst for x in cmd]
 103
 104         def pass1(self):
 105                 p = self.profile
 106                 cmd = []
 107                 cmd += ["mencoder", "%(input)s", "-o", "/dev/null"]
 108                 self.insert_options(cmd)
 109                 cmd += ["-ovc", p.vcodec, self.codec2opts[p.vcodec], p.vopts]
 110                 cmd += ["-oac", "copy"]
 111                 cmd += self.profile.extra + self.profile.extra1
 112                 cmd = self.subst_values(cmd, vpass=1)
 113                 return cmd
 114
 115         def pass2(self):
 116                 p = self.profile
 117                 cmd = []
 118                 cmd += ["mencoder", "%(input)s", "-o", "%(output)s"]
 119                 self.insert_options(cmd)
 120                 cmd += ["-ovc", p.vcodec, self.codec2opts[p.vcodec], p.vopts]
 121                 cmd += ["-oac", p.acodec, self.codec2opts[p.acodec], p.aopts]
 122                 if self.opts.episode_name:
 123                         cmd += ["-info", "name='%s'" % self.opts.episode_name]
 124                 cmd += self.profile.extra + self.profile.extra2
 125                 cmd = self.subst_values(cmd, vpass=2)
 126                 return cmd
 127
 128         def check(self):
 129                 self.check_command("mencoder")
 130                 self.check_no_file(self.opts.output + ".avi")
 131
 132         def run(self):
 133                 self.do_exec(self.pass1())
 134                 self.do_exec(self.pass2())
 135
 136
 137
 138 class Profile(object):
 139         def __init__(self, commands, **kwargs):
 140                 self.default_opts = {
 141                         "vbitrate": 1000,
 142                         "abitrate": 192,
 143                 }
 144                 self.extra = []
 145                 self.extra1 = []
 146                 self.extra2 = []
 147                 self.commands = commands
 148                 self.__dict__.update(kwargs)
 149
 150         def __contains__(self, keyname):
 151                 return hasattr(self, keyname)
 152
 153
 154 profiles = {
 155         "qt7" :
 156         Profile(
 157                 commands=[Mencoder, MP4Box],
 158                 vcodec="x264",
 159                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:me=umh:partitions=all:trellis=1:subq=7:bframes=1:direct_pred=auto",
 160                 acodec="faac",
 161                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 162         ),
 163
 164         "xvid" :
 165         Profile(
 166                 commands=[Mencoder],
 167                 vcodec="xvid",
 168                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vhq=4:autoaspect",
 169                 acodec="mp3lame",
 170                 aopts="abr:br=%(abitrate)d",
 171                 extra2=["-ffourcc", "DX50"],
 172         ),
 173
 174         "ipodxvid" :
 175         Profile(
 176                 commands=[Mencoder, MP4Box],
 177                 vcodec="xvid",
 178                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vhq=4:autoaspect:max_bframes=0",
 179                 acodec="faac",
 180                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 181                 extra=["-vf-add", "scale=480:-10"],
 182         ),
 183
 184         "ipodx264" :
 185         Profile(
 186                 commands=[Mencoder, MP4Box],
 187                 vcodec="x264",
 188                 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",
 189                 acodec="faac",
 190                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 191                 extra=["-vf-add", "scale=480:-10"],
 192                 extra2=["-channels", "2", "-srate", "48000"],
 193         ),
 194
 195         "nokiax264" :
 196         Profile(
 197                 commands=[Mencoder, MP4Box],
 198                 default_opts={
 199                         "vbitrate": 256,
 200                         "abitrate": 96,
 201                 },
 202                 vcodec="x264",
 203                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:nocabac:me=umh:partitions=all:trellis=1:subq=7:bframes=0:direct_pred=auto",
 204                 acodec="faac",
 205                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 206                 extra=["-vf-add", "scale=320:-10"],
 207         ),
 208
 209         "n97xvid" :
 210         Profile(
 211                 commands=[Mencoder, MP4Box],
 212                 default_opts={
 213                         "vbitrate": 1000,
 214                         "abitrate": 96,
 215                 },
 216                 vcodec="xvid",
 217                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vhq=4:autoaspect:max_bframes=0",
 218                 acodec="faac",
 219                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 220                 extra=["-vf-add", "scale=640:-10"],
 221         ),
 222
 223         "n97x264" :
 224         Profile(
 225                 commands=[Mencoder, MP4Box],
 226                 default_opts={
 227                         "vbitrate": 1000,
 228                         "abitrate": 96,
 229                 },
 230                 vcodec="x264",
 231                 vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vbv_maxrate=2000:vbv_bufsize=2000:nocabac:me=umh:partitions=all:trellis=1:subq=7:bframes=0:direct_pred=auto:level_idc=20",
 232                 acodec="faac",
 233                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 234                 extra=["-vf-add", "scale=640:-10"],
 235         ),
 236 }
 237
 238
 239
 240
 241 def parse_args():
 242         for profile_name in profiles.keys():
 243                 if sys.argv[0].find(profile_name) >= 0:
 244                         break
 245         else:
 246                 profile_name = "xvid"
 247
 248         parser = optparse.OptionParser(usage="%prog [options] input [output]")
 249         parser.add_option("--dvd", action="store", dest="dvd")
 250         parser.add_option("--deinterlace", action="store_true", dest="deinterlace")
 251         parser.add_option("--vfilters", action="store", dest="vfilters")
 252         parser.add_option("--afilters", action="store", dest="afilters")
 253         parser.add_option("--vbitrate", action="store", dest="vbitrate", type="int")
 254         parser.add_option("--abitrate", action="store", dest="abitrate", type="int")
 255         parser.add_option("--chapter", action="store", dest="chapter")
 256         parser.add_option("--startpos", action="store", dest="startpos")
 257         parser.add_option("--endpos", action="store", dest="endpos")
 258         parser.add_option("--audioid", action="store", dest="audioid")
 259         parser.add_option("--subtitleid", action="store", dest="subtitleid")
 260         parser.add_option("--profile", action="store", dest="profile_name", default=profile_name)
 261         parser.add_option("--episode-name", action="store", dest="episode_name")
 262         parser.add_option("--dump", action="store_true", dest="dump")
 263         try:
 264                 opts, args = parser.parse_args(sys.argv[1:])
 265                 if len(args) == 1:
 266                         input = args[0]
 267                         output = os.path.splitext(os.path.basename(input))[0]
 268                 elif len(args) == 2:
 269                         input, output = args
 270                 else:
 271                         raise ValueError
 272         except Exception:
 273                 parser.print_usage()
 274                 sys.exit(1)
 275
 276         if "://" not in input:
 277                 opts.input = os.path.abspath(input)
 278         else:
 279                 if opts.dvd:
 280                         opts.dvd = os.path.abspath(opts.dvd)
 281                 opts.input = input
 282
 283         opts.output = os.path.abspath(output)
 284
 285         return opts
 286
 287 def main():
 288         opts = parse_args()
 289
 290         # Find our profile
 291         try:
 292                 profile = profiles[opts.profile_name]
 293         except KeyError:
 294                 print >>sys.stderr, "Profile '%s' not found!" % opts.profile_name
 295                 sys.exit(1)
 296
 297         # Pull in default option values from the profile
 298         for key, value in profile.default_opts.iteritems():
 299                 if getattr(opts, key) is None:
 300                         setattr(opts, key, value)
 301
 302         # Run in a temp dir so that multiple instances can be run simultaneously
 303         tempdir = tempfile.mkdtemp()
 304         try:
 305                 os.chdir(tempdir)
 306
 307                 try:
 308                         commands = []
 309                         for CommandClass in profile.commands:
 310                                 command = CommandClass(profile, opts)
 311                                 commands.append(command)
 312                                 command.check()
 313                         for command in commands:
 314                                 command.run()
 315
 316                 except FatalException, e:
 317                         print >>sys.stderr, "Error:", e.message
 318                         sys.exit(1)
 319
 320         finally:
 321                 os.chdir("/")
 322                 shutil.rmtree(tempdir)
 323
 324 if __name__ == "__main__":
 325         main()
 326