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         "-ffourcc", "DX50",
   8         "-vf", "%(filters)s",
   9         "-ovc", "x264", "-x264encopts", "pass=%(pass)d:turbo:bitrate=%(vbitrate)d:bframes=0:me=umh:partitions=all:trellis=1:qp_step=4:qcomp=0.7:direct_pred=auto:keyint=300",
  10         "-oac", "faac", "-faacopts", "br=%(abitrate)d:mpeg=4:object=2", "-channels", "2", "-srate", "48000",
  11 ]
  12
  13 parser = optparse.OptionParser(usage="%prog [options] input output")
  14 parser.add_option("--dvd", action="store", dest="dvd")
  15 parser.add_option("--filters", action="store", dest="filters", default="denoise3d")
  16 parser.add_option("--vbitrate", action="store", dest="vbitrate", type="int", default=600)
  17 parser.add_option("--abitrate", action="store", dest="abitrate", type="int", default=192)
  18 parser.add_option("--dump", action="store_true", dest="dump")
  19 try:
  20         opts, (input, output) = parser.parse_args(sys.argv[1:])
  21 except:
  22         parser.print_usage()
  23         sys.exit(1)
  24
  25 # Start/stop time?
  26 # Custom dvd device?
  27 if opts.dvd:
  28         cmd.insert(1, opts.dvd)
  29         cmd.insert(1, "-dvd-device")
  30
  31 # Default options
  32 subst = {
  33         "vbitrate": opts.vbitrate,
  34         "abitrate": opts.abitrate,
  35         "filters": opts.filters,
  36         "input": input,
  37 }
  38
  39 def run(args):
  40         if opts.dump:
  41                 print " ".join(args)
  42         else:
  43                 subprocess.Popen(args).wait()
  44
  45 # Pass 1
  46 subst["pass"] = 1
  47 subst["output"] = "/dev/null"
  48 run([x % subst for x in cmd])
  49
  50 # Pass 2
  51 subst["pass"] = 2
  52 subst["output"] = output
  53 run([x % subst for x in cmd])
  54