code.delx.au - transcoding/blob - toh264.py

   1 #!/usr/bin/env python
   2
   3 import optparse, subprocess, sys
   4
   5 cmd = [
   6         "mencoder", "%(input)s", "-o", "%(output)s",
   7         "-vf", "%(filters)s",
   8         "-ovc", "x264", "-x264encopts", "pass=%(pass)d:bitrate=%(vbitrate)d:me=umh:partitions=all:trellis=1",
   9         "-oac", "faac", "-faacopts", "br=%(abitrate)d:mpeg=4:object=2", "-channels", "2", "-srate", "48000",
  10 ]
  11
  12
  13 def parseArgs():
  14         parser = optparse.OptionParser(usage="%prog [options] input output")
  15         parser.add_option("--dvd", action="store", dest="dvd")
  16         parser.add_option("--filters", action="store", dest="filters", default="denoise3d")
  17         parser.add_option("--vbitrate", action="store", dest="vbitrate", type="int", default=600)
  18         parser.add_option("--abitrate", action="store", dest="abitrate", type="int", default=192)
  19         parser.add_option("--startpos", action="store", dest="startpos")
  20         parser.add_option("--endpos", action="store", dest="endpos")
  21         parser.add_option("--dump", action="store_true", dest="dump")
  22         try:
  23                 opts, (input, output) = parser.parse_args(sys.argv[1:])
  24         except:
  25                 parser.print_usage()
  26                 sys.exit(1)
  27
  28         return opts, input, output
  29
  30 def insertOpt(opt, var):
  31         if var:
  32                 cmd.insert(1, var)
  33                 cmd.insert(1, opt)
  34
  35 def run(args, dump):
  36         if dump:
  37                 print " ".join(args)
  38         else:
  39                 subprocess.Popen(args).wait()
  40
  41 def main():
  42         opts, input, output = parseArgs()
  43
  44         insertOpt("-ss", opts.startpos)
  45         insertOpt("-endpos", opts.endpos)
  46         insertOpt("-dvd-device", opts.dvd)
  47
  48         subst = {
  49                 "vbitrate": opts.vbitrate,
  50                 "abitrate": opts.abitrate,
  51                 "filters": opts.filters,
  52                 "input": input,
  53         }
  54
  55         # Pass 1
  56         subst["pass"] = 1
  57         subst["output"] = "/dev/null"
  58         run([x % subst for x in cmd], opts.dump)
  59
  60         # Pass 2
  61         subst["pass"] = 2
  62         subst["output"] = output
  63         run([x % subst for x in cmd], opts.dump)
  64
  65 if __name__ == "__main__":
  66         main()
  67