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

   1 #!/usr/bin/env python
   2
   3 import commands, optparse, subprocess, sys, os
   4
   5 class MencoderCommand(object):
   6         codec2opts = {
   7                 "lavc": "-lavcopts",
   8                 "xvid": "-xvidencopts",
   9                 "x264": "-x264encopts",
  10                 "faac": "-faaccopts",
  11                 "mp3lame": "-lameopts",
  12         }
  13
  14         def __init__(self, profile, opts):
  15                 self.profile = profile
  16                 self.opts = opts
  17
  18         def insertOptions(self, cmd):
  19                 def tryOpt(opt, var):
  20                         if var is not None:
  21                                 cmd.append(opt)
  22                                 cmd.append(var)
  23                 tryOpt("-ss", self.opts.startpos)
  24                 tryOpt("-endpos", self.opts.endpos)
  25                 tryOpt("-dvd-device", self.opts.dvd)
  26                 tryOpt("-chapter", self.opts.chapter)
  27                 tryOpt("-aid", self.opts.audioid)
  28                 tryOpt("-sid", self.opts.subtitleid)
  29                 tryOpt("-vf", self.opts.vfilters)
  30                 tryOpt("-af", self.opts.afilters)
  31
  32         def substValues(self, cmd):
  33                 subst = {
  34                         "vbitrate": self.opts.vbitrate,
  35                         "abitrate": self.opts.abitrate,
  36                         "input": self.opts.input,
  37                         "output": self.opts.output,
  38                 }
  39
  40                 return [x % subst for x in cmd]
  41
  42         def pass1(self):
  43                 p = self.profile
  44                 cmd = []
  45                 cmd += ["mencoder", "%(input)s", "-o", "/dev/null"]
  46                 self.insertOptions(cmd)
  47                 cmd += ["-ovc", p.vcodec, self.codec2opts[p.vcodec], "pass=1:"+p.vopts]
  48                 cmd += ["-oac", "copy"]
  49                 cmd = self.substValues(cmd)
  50                 return cmd
  51
  52         def pass2(self):
  53                 p = self.profile
  54                 cmd = []
  55                 cmd += ["mencoder", "%(input)s", "-o", "%(output)s"]
  56                 self.insertOptions(cmd)
  57                 cmd += ["-ovc", p.vcodec, self.codec2opts[p.vcodec], "pass=2:"+p.vopts]
  58                 cmd += ["-oac", p.acodec, self.codec2opts[p.acodec], p.aopts]
  59                 if self.opts.episode_name:
  60                         cmd += ["-info", "name='%s'" % self.opts.episode_name]
  61                 cmd += self.profile.extra
  62                 cmd = self.substValues(cmd)
  63                 return cmd
  64
  65 class Profile(object):
  66         def __init__(self, CommandClass, **kwargs):
  67                 self.CommandClass = CommandClass
  68                 self.__dict__.update(kwargs)
  69
  70 profiles = {
  71         "qt7" :
  72         Profile(
  73                 CommandClass=MencoderCommand,
  74                 vcodec="x264",
  75                 vopts="bitrate=%(vbitrate)d:me=umh:partitions=all:trellis=1:subq=7:bframes=1:direct_pred=auto",
  76                 acodec="faac",
  77                 aopts="br=%(abitrate)d:mpeg=4:object=2",
  78         ),
  79
  80         "xvid" :
  81         Profile(
  82                 CommandClass=MencoderCommand,
  83                 vcodec="xvid",
  84                 vopts="bitrate=%(vbitrate)d:vhq=4:autoaspect",
  85                 acodec="mp3lame",
  86                 aopts="abr:br=%(abitrate)d",
  87                 extra=["-ffourcc", "DX50"],
  88         ),
  89         "ipodxvid" :
  90         Profile(
  91                 CommandClass=MencoderCommand,
  92                 vcodec="xvid",
  93                 vopts="bitrate=%(vbitrate)d:vhq=4:autoaspect:max_bframes=0",
  94                 acodec="faac",
  95                 aopts="br=%(abitrate)d:mpeg=4:object=2",
  96         ),
  97         "ipod264" :
  98         Profile(
  99                 CommandClass=MencoderCommand,
 100                 vcodec="x264",
 101                 vopts="bitrate=%(vbitrate)d:me=umh:threads=auto:partitions=all:trellis=1:subq=7:bframes=1:direct_pred=auto",
 102                 acodec="faac",
 103                 aopts="br=%(abitrate)d:mpeg=4:object=2",# "-channels", "2", "-srate", "48000",
 104         ),
 105 }
 106
 107
 108
 109
 110 def parse_args():
 111         for profile_name in profiles.keys():
 112                 if sys.argv[0].find(profile_name) >= 0:
 113                         break
 114         else:
 115                 profile_name = "xvid"
 116
 117         parser = optparse.OptionParser(usage="%prog [options] input output")
 118         parser.add_option("--dvd", action="store", dest="dvd")
 119         parser.add_option("--vfilters", action="store", dest="vfilters")
 120         parser.add_option("--afilters", action="store", dest="afilters")
 121         parser.add_option("--vbitrate", action="store", dest="vbitrate", type="int", default=1000)
 122         parser.add_option("--abitrate", action="store", dest="abitrate", type="int", default=192)
 123         parser.add_option("--chapter", action="store", dest="chapter")
 124         parser.add_option("--startpos", action="store", dest="startpos")
 125         parser.add_option("--endpos", action="store", dest="endpos")
 126         parser.add_option("--audioid", action="store", dest="audioid")
 127         parser.add_option("--subtitleid", action="store", dest="subtitleid")
 128         parser.add_option("--profile", action="store", dest="profile_name", default=profile_name)
 129         parser.add_option("--episode-name", action="store", dest="episode_name")
 130         parser.add_option("--dump", action="store_true", dest="dump")
 131         try:
 132                 opts, (input, output) = parser.parse_args(sys.argv[1:])
 133         except Exception:
 134                 parser.print_usage()
 135                 sys.exit(1)
 136
 137         opts.input = input
 138         opts.output = output
 139         return opts
 140
 141 def run(args, dump):
 142         if dump:
 143                 print "".join(map(commands.mkarg, args))[1:]
 144         else:
 145                 return subprocess.Popen(args).wait()
 146
 147 def main():
 148         opts = parse_args()
 149         try:
 150                 profile = profiles[opts.profile_name]
 151         except KeyError:
 152                 print >>sys.stderr, "Profile '%s' not found!" % profile_name
 153                 sys.exit(1)
 154
 155         cmd = profile.CommandClass(profile, opts)
 156         if run(cmd.pass1(), opts.dump) == 0 or opts.dump:
 157                 run(cmd.pass2(), opts.dump)
 158
 159 if __name__ == "__main__":
 160         main()
 161