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

   1 #!/usr/bin/env python
   2
   3 import optparse, subprocess, sys
   4
   5 cmd = [
   6         "mencoder", "%(input)s", "-o", "%(output)s",
   7         "-ffourcc", "DX50",
   8         "-vf", "%(filters)s",
   9         "-ovc", "xvid", "-xvidencopts", "pass=%(pass)d:bitrate=%(vbitrate)d:vhq=4",
  10         "-oac", "mp3lame", "-lameopts", "abr:br=%(abitrate)d",
  11 ]
  12
  13
  14 def parseArgs():
  15         parser = optparse.OptionParser(usage="%prog [options] input output")
  16         parser.add_option("--dvd", action="store", dest="dvd")
  17         parser.add_option("--filters", action="store", dest="filters", default="denoise3d")
  18         parser.add_option("--vbitrate", action="store", dest="vbitrate", type="int", default=600)
  19         parser.add_option("--abitrate", action="store", dest="abitrate", type="int", default=192)
  20         parser.add_option("--chapter", action="store", dest="chapter")
  21         parser.add_option("--startpos", action="store", dest="startpos")
  22         parser.add_option("--endpos", action="store", dest="endpos")
  23         parser.add_option("--audioid", action="store", dest="audioid")
  24         parser.add_option("--dump", action="store_true", dest="dump")
  25         try:
  26                 opts, (input, output) = parser.parse_args(sys.argv[1:])
  27         except:
  28                 parser.print_usage()
  29                 sys.exit(1)
  30
  31         return opts, input, output
  32
  33 def insertOpt(opt, var):
  34         if var:
  35                 cmd.insert(1, var)
  36                 cmd.insert(1, opt)
  37
  38 def run(args, dump):
  39         if dump:
  40                 print " ".join(args)
  41         else:
  42                 subprocess.Popen(args).wait()
  43
  44 def main():
  45         opts, input, output = parseArgs()
  46
  47         insertOpt("-ss", opts.startpos)
  48         insertOpt("-endpos", opts.endpos)
  49         insertOpt("-dvd-device", opts.dvd)
  50         insertOpt("-chapter", opts.chapter)
  51         insertOpt("-aid", opts.audioid)
  52
  53         subst = {
  54                 "vbitrate": opts.vbitrate,
  55                 "abitrate": opts.abitrate,
  56                 "filters": opts.filters,
  57                 "input": input,
  58         }
  59
  60         # Pass 1
  61         subst["pass"] = 1
  62         subst["output"] = "/dev/null"
  63         run([x % subst for x in cmd], opts.dump)
  64
  65         # Pass 2
  66         subst["pass"] = 2
  67         subst["output"] = output
  68         run([x % subst for x in cmd], opts.dump)
  69
  70 if __name__ == "__main__":
  71         main()
  72