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("--startpos", action="store", dest="startpos")
  21         parser.add_option("--endpos", action="store", dest="endpos")
  22         parser.add_option("--dump", action="store_true", dest="dump")
  23         try:
  24                 opts, (input, output) = parser.parse_args(sys.argv[1:])
  25         except:
  26                 parser.print_usage()
  27                 sys.exit(1)
  28
  29         return opts, input, output
  30
  31 def insertOpt(opt, var):
  32         if var:
  33                 cmd.insert(1, var)
  34                 cmd.insert(1, opt)
  35
  36 def run(args, dump):
  37         if dump:
  38                 print " ".join(args)
  39         else:
  40                 subprocess.Popen(args).wait()
  41
  42 def main():
  43         opts, input, output = parseArgs()
  44
  45         insertOpt("-ss", opts.startpos)
  46         insertOpt("-endpos", opts.endpos)
  47         insertOpt("-dvd-device", opts.dvd)
  48
  49         subst = {
  50                 "vbitrate": opts.vbitrate,
  51                 "abitrate": opts.abitrate,
  52                 "filters": opts.filters,
  53                 "input": input,
  54         }
  55
  56         # Pass 1
  57         subst["pass"] = 1
  58         subst["output"] = "/dev/null"
  59         run([x % subst for x in cmd], opts.dump)
  60
  61         # Pass 2
  62         subst["pass"] = 2
  63         subst["output"] = output
  64         run([x % subst for x in cmd], opts.dump)
  65
  66 if __name__ == "__main__":
  67         main()
  68