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