]> code.delx.au - transcoding/commitdiff
MP4Box support in encode.py, profiles specify bitrate + more below
authorJames Bunton <jamesbunton@fastmail.fm>
Sat, 28 Feb 2009 11:39:33 +0000 (22:39 +1100)
committerJames Bunton <jamesbunton@fastmail.fm>
Sat, 28 Feb 2009 11:39:33 +0000 (22:39 +1100)
 * Ability to chain commands in a profile
 * Added MP4Box command
 * Removed all uses of mencoder's lavf, and replaced with MP4Box
 * Profiles can specify default bitrates as well as resolutions
 * Made output parameter optional, it can be intelligently inferred

encode.py

index 371d27d9d0be56e544f28d6686d47cc78ef1ea35..f99230ab3605ced1c22487b3a67f594ba80460dc 100755 (executable)
--- a/encode.py
+++ b/encode.py
@@ -8,7 +8,59 @@ import os
 import tempfile
 import shutil
 
-class MencoderCommand(object):
+class FatalException(Exception):
+       pass
+
+class Command(object):
+       def __init__(self, profile, opts):
+               self.profile = profile
+               self.opts = opts
+       
+       def print_install_message(self):
+               print >>sys.stderr, "Problem with command: %s", self.name
+               if self.package:
+                       print >>sys.stderr, "Try running:\n# aptitude install %s", self.package
+       
+       def check_command(self, cmd):
+               if self.opts.dump:
+                       return
+               if subprocess.Popen(["which", cmd], stdout=open("/dev/null", "w")).wait() != 0:
+                       raise FatalException("Command '%s' is required" % cmd)
+
+       def do_exec(self, args):
+               if self.opts.dump:
+                       print "".join(map(commands.mkarg, args))[1:]
+               else:
+                       if subprocess.Popen(args).wait() != 0:
+                               raise FatalException("Failure executing command: %s" % args)
+
+
+class MP4Box(Command):
+       codec2exts = {
+               "xvid": "m4v",
+               "x264": "h264",
+               "faac": "aac",
+       }
+
+       def check(self):
+               self.check_command("mencoder")
+               self.check_command("MP4Box")
+
+       def run(self):
+               p = self.profile
+               video = "video.%s" % self.codec2exts[p.vcodec]
+               audio = "audio.%s" % self.codec2exts[p.acodec]
+               input = self.opts.output + ".avi" # From Mencoder command
+               output = self.opts.output + ".mp4"
+               mencoder = ["mencoder", input, "-ovc", "copy", "-oac", "copy", "-of"]
+               self.do_exec(["rm", "-f", output])
+               self.do_exec(mencoder + ["rawvideo", "-o", video])
+               self.do_exec(mencoder + ["rawaudio", "-o", audio])
+               self.do_exec(["MP4Box", "-add", video, "-add", audio, output])
+               self.do_exec(["rm", "-f", video, audio, input])
+
+
+class Mencoder(Command):
        codec2opts = {
                "lavc": "-lavcopts",
                "xvid": "-xvidencopts",
@@ -17,10 +69,6 @@ class MencoderCommand(object):
                "mp3lame": "-lameopts",
        }
 
-       def __init__(self, profile, opts):
-               self.profile = profile
-               self.opts = opts
-
        def insert_options(self, cmd):
                def try_opt(opt, var):
                        if var is not None:
@@ -42,7 +90,7 @@ class MencoderCommand(object):
                        "vbitrate": self.opts.vbitrate,
                        "abitrate": self.opts.abitrate,
                        "input": self.opts.input,
-                       "output": self.opts.output,
+                       "output": self.opts.output + ".avi",
                        "vpass": vpass,
                }
 
@@ -55,6 +103,7 @@ class MencoderCommand(object):
                self.insert_options(cmd)
                cmd += ["-ovc", p.vcodec, self.codec2opts[p.vcodec], p.vopts]
                cmd += ["-oac", "copy"]
+               cmd += self.profile.extra + self.profile.extra1
                cmd = self.subst_values(cmd, vpass=1)
                return cmd
 
@@ -67,23 +116,39 @@ class MencoderCommand(object):
                cmd += ["-oac", p.acodec, self.codec2opts[p.acodec], p.aopts]
                if self.opts.episode_name:
                        cmd += ["-info", "name='%s'" % self.opts.episode_name]
-               cmd += self.profile.extra
+               cmd += self.profile.extra + self.profile.extra2
                cmd = self.subst_values(cmd, vpass=2)
                return cmd
 
+       def check(self):
+               self.check_command("mencoder")
+
+       def run(self):
+               self.do_exec(self.pass1())
+               self.do_exec(self.pass2())
+
+
+
 class Profile(object):
-       def __init__(self, CommandClass, **kwargs):
+       def __init__(self, commands, **kwargs):
+               self.default_opts = {
+                       "vbitrate": 1000,
+                       "abitrate": 192,
+               }
                self.extra = []
-
-               self.CommandClass = CommandClass
+               self.extra1 = []
+               self.extra2 = []
+               self.commands = commands
                self.__dict__.update(kwargs)
+
        def __contains__(self, keyname):
                return hasattr(self, keyname)
 
+
 profiles = {
        "qt7" :
        Profile(
-               CommandClass=MencoderCommand,
+               commands=[Mencoder, MP4Box],
                vcodec="x264",
                vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:me=umh:partitions=all:trellis=1:subq=7:bframes=1:direct_pred=auto",
                acodec="faac",
@@ -92,31 +157,46 @@ profiles = {
 
        "xvid" :
        Profile(
-               CommandClass=MencoderCommand,
+               commands=[Mencoder],
                vcodec="xvid",
                vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vhq=4:autoaspect",
                acodec="mp3lame",
                aopts="abr:br=%(abitrate)d",
-               extra=["-ffourcc", "DX50"],
+               extra2=["-ffourcc", "DX50"],
        ),
 
        "ipodxvid" :
        Profile(
-               CommandClass=MencoderCommand,
+               commands=[Mencoder, MP4Box],
                vcodec="xvid",
                vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:vhq=4:autoaspect:max_bframes=0",
                acodec="faac",
                aopts="br=%(abitrate)d:mpeg=4:object=2",
+               extra=["-vf-add", "scale=480:-10"],
        ),
 
-       "ipod264" :
+       "ipodx264" :
        Profile(
-               CommandClass=MencoderCommand,
+               commands=[Mencoder, MP4Box],
                vcodec="x264",
                vopts="pass=%(vpass)d: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",
                acodec="faac",
                aopts="br=%(abitrate)d:mpeg=4:object=2:raw",
-               extra=["-of", "lavf", "-lavfopts", "format=mp4", "-channels", "2", "-srate", "48000"]
+               extra2=["-channels", "2", "-srate", "48000"]
+       ),
+
+       "nokiax264" :
+       Profile(
+               commands=[Mencoder, MP4Box],
+               default_opts={
+                       "vbitrate": 256,
+                       "abitrate": 96,
+               },
+               vcodec="x264",
+               vopts="pass=%(vpass)d:bitrate=%(vbitrate)d:nocabac:me=umh:partitions=all:trellis=1:subq=7:bframes=0:direct_pred=auto:global_header",
+               acodec="faac",
+               aopts="br=%(abitrate)d:mpeg=4:object=2:raw",
+               extra=["-vf-add", "scale=320:-10"],
        ),
 }
 
@@ -130,13 +210,13 @@ def parse_args():
        else:
                profile_name = "xvid"
 
-       parser = optparse.OptionParser(usage="%prog [options] input output")
+       parser = optparse.OptionParser(usage="%prog [options] input [output]")
        parser.add_option("--dvd", action="store", dest="dvd")
        parser.add_option("--deinterlace", action="store_true", dest="deinterlace")
        parser.add_option("--vfilters", action="store", dest="vfilters")
        parser.add_option("--afilters", action="store", dest="afilters")
-       parser.add_option("--vbitrate", action="store", dest="vbitrate", type="int", default=1000)
-       parser.add_option("--abitrate", action="store", dest="abitrate", type="int", default=192)
+       parser.add_option("--vbitrate", action="store", dest="vbitrate", type="int")
+       parser.add_option("--abitrate", action="store", dest="abitrate", type="int")
        parser.add_option("--chapter", action="store", dest="chapter")
        parser.add_option("--startpos", action="store", dest="startpos")
        parser.add_option("--endpos", action="store", dest="endpos")
@@ -146,41 +226,60 @@ def parse_args():
        parser.add_option("--episode-name", action="store", dest="episode_name")
        parser.add_option("--dump", action="store_true", dest="dump")
        try:
-               opts, (input, output) = parser.parse_args(sys.argv[1:])
+               opts, args = parser.parse_args(sys.argv[1:])
+               if len(args) == 1:
+                       input = args[0]
+                       output = os.path.splitext(os.path.basename(input))[0]
+               elif len(args) == 2:
+                       input, output = args
        except Exception:
                parser.print_usage()
                sys.exit(1)
        
        if "://" not in input:
-               opts.input = os.path.join(os.getcwd(), input)
+               opts.input = os.path.abspath(input)
        else:
                if opts.dvd:
-                       opts.dvd = os.path.join(os.getcwd(), opts.dvd)
+                       opts.dvd = os.path.abspath(opts.dvd)
                opts.input = input
 
-       opts.output = os.path.join(os.getcwd(), output)
-       return opts
+       opts.output = os.path.abspath(output)
 
-def run(args, dump):
-       if dump:
-               print "".join(map(commands.mkarg, args))[1:]
-       else:
-               return subprocess.Popen(args).wait()
+       return opts
 
 def main():
        opts = parse_args()
+
+       # Find our profile
        try:
                profile = profiles[opts.profile_name]
        except KeyError:
                print >>sys.stderr, "Profile '%s' not found!" % opts.profile_name
                sys.exit(1)
 
+       # Pull in default option values from the profile
+       for key, value in profile.default_opts.iteritems():
+               if getattr(opts, key) is None:
+                       setattr(opts, key, value)
+
+       # Run in a temp dir so that multiple instances can be run simultaneously
        tempdir = tempfile.mkdtemp()
        try:
                os.chdir(tempdir)
-               cmd = profile.CommandClass(profile, opts)
-               if run(cmd.pass1(), opts.dump) == 0 or opts.dump:
-                       run(cmd.pass2(), opts.dump)
+
+               try:
+                       commands = []
+                       for CommandClass in profile.commands:
+                               command = CommandClass(profile, opts)
+                               commands.append(command)
+                               command.check()
+                       for command in commands:
+                               command.run()
+
+               except FatalException, e:
+                       print >>sys.stderr, "Error:", e.message
+                       sys.exit(1)
+
        finally:
                os.chdir("/")
                shutil.rmtree(tempdir)