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": "-faacopts",
  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.extra = []
  68
  69                 self.CommandClass = CommandClass
  70                 self.__dict__.update(kwargs)
  71         def __contains__(self, keyname):
  72                 return hasattr(self, keyname)
  73
  74 profiles = {
  75         "qt7" :
  76         Profile(
  77                 CommandClass=MencoderCommand,
  78                 vcodec="x264",
  79                 vopts="bitrate=%(vbitrate)d:me=umh:partitions=all:trellis=1:subq=7:bframes=1:direct_pred=auto",
  80                 acodec="faac",
  81                 aopts="br=%(abitrate)d:mpeg=4:object=2",
  82         ),
  83
  84         "xvid" :
  85         Profile(
  86                 CommandClass=MencoderCommand,
  87                 vcodec="xvid",
  88                 vopts="bitrate=%(vbitrate)d:vhq=4:autoaspect",
  89                 acodec="mp3lame",
  90                 aopts="abr:br=%(abitrate)d",
  91                 extra=["-ffourcc", "DX50"],
  92         ),
  93         "ipodxvid" :
  94         Profile(
  95                 CommandClass=MencoderCommand,
  96                 vcodec="xvid",
  97                 vopts="bitrate=%(vbitrate)d:vhq=4:autoaspect:max_bframes=0",
  98                 acodec="faac",
  99                 aopts="br=%(abitrate)d:mpeg=4:object=2",
 100         ),
 101         "ipod264" :
 102         Profile(
 103                 CommandClass=MencoderCommand,
 104                 vcodec="x264",
 105                 vopts="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:global_header:turbo",
 106                 acodec="faac",
 107                 aopts="br=%(abitrate)d:mpeg=4:object=2:raw",
 108                 extra=['-of', 'lavf', '-lavfopts', 'format=mp4', '-channels', '2', '-srate', '48000']
 109         ),
 110 }
 111
 112
 113
 114
 115 def parse_args():
 116         for profile_name in profiles.keys():
 117                 if sys.argv[0].find(profile_name) >= 0:
 118                         break
 119         else:
 120                 profile_name = "xvid"
 121
 122         parser = optparse.OptionParser(usage="%prog [options] input output")
 123         parser.add_option("--dvd", action="store", dest="dvd")
 124         parser.add_option("--vfilters", action="store", dest="vfilters")
 125         parser.add_option("--afilters", action="store", dest="afilters")
 126         parser.add_option("--vbitrate", action="store", dest="vbitrate", type="int", default=1000)
 127         parser.add_option("--abitrate", action="store", dest="abitrate", type="int", default=192)
 128         parser.add_option("--chapter", action="store", dest="chapter")
 129         parser.add_option("--startpos", action="store", dest="startpos")
 130         parser.add_option("--endpos", action="store", dest="endpos")
 131         parser.add_option("--audioid", action="store", dest="audioid")
 132         parser.add_option("--subtitleid", action="store", dest="subtitleid")
 133         parser.add_option("--profile", action="store", dest="profile_name", default=profile_name)
 134         parser.add_option("--episode-name", action="store", dest="episode_name")
 135         parser.add_option("--dump", action="store_true", dest="dump")
 136         try:
 137                 opts, (input, output) = parser.parse_args(sys.argv[1:])
 138         except Exception:
 139                 parser.print_usage()
 140                 sys.exit(1)
 141
 142         opts.input = input
 143         opts.output = output
 144         return opts
 145
 146 def run(args, dump):
 147         if dump:
 148                 print "".join(map(commands.mkarg, args))[1:]
 149         else:
 150                 return subprocess.Popen(args).wait()
 151
 152 def main():
 153         opts = parse_args()
 154         try:
 155                 profile = profiles[opts.profile_name]
 156         except KeyError:
 157                 print >>sys.stderr, "Profile '%s' not found!" % profile_name
 158                 sys.exit(1)
 159
 160         cmd = profile.CommandClass(profile, opts)
 161         if run(cmd.pass1(), opts.dump) == 0 or opts.dump:
 162                 run(cmd.pass2(), opts.dump)
 163
 164 if __name__ == "__main__":
 165         main()
 166