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tcdemux(1)		    General Commands Manual		    tcdemux(1)

       tcdemux - demultiplex a program stream

	      -i  name	[  -t  magic  ]	 [ -x codec ] [	-S unit,[s1-s2]	] [ -a
	      ach,[vch]	] [ -s 0xnn ] [	-M mode	] [ -f fps ] [ -W ] [ -O  ]  [
	      -P name ]	[ -A n[,m[,...]]  ] [ -d verbosity ] [ -v ]

       tcdemux is Copyright (C)	by Thomas Oestreich.

       tcdemux is part of and usually called by	transcode.
       However,	it can also be used independently.
       tcdemux reads source (from stdin	if not explicitely defined) and	prints
       on the standard output.

       -i name
	      Specify input source.  If	ommited, stdin is assumed.

       -x codec
	      Process only packets containing given codec as  payload.	 Exam-
	      ples are "mpeg2" for MPEG	video or "ac3" for audio packets.

       -t magic
	      Specify  the input file type magic.  Useful for using tcdemux in
	      pipelines. This is normally autodetected.

       -a ach[,vch]
	      Process only packets containing given audio track	ach and	 video
	      track  vch.   Most  program stream feature multiple audio	tracks
	      but only a single	video stream. Default is "-a 0,0".

       -s 0xnn
	      Select specific multimedia track using the  standard  identifier
	      0xnn.  This useful to extract subtitle packets.

       -f fps Specify the frame	rate fps for subtitle meta information used by
	      external applications.

       -S unit[,s1-s2]
	      Select a program unit unit and a selected	GOP  range  s1-s2  for
	      processing. A unit is usually a set of GOPs that need to be syn-
	      chronized	at the very beginning. This option can be used to  el-
	      eminate  junk units at the beginning of the main presentation or
	      to select	certain	episodes of a TV series	from a DVD. A GOP is a
	      logical  unit  to	 be  properly decoded, i.e., decoding can only
	      start at the beginning of	a GOP.

       -O     Do not skip initial sequence. Used internally by transcode.

       -A n[,m[,...]]
	      Select packets using an identifier for extracting	only  selected
	      streams without processing. This is useful for size reduction of
	      your multimedia stream. Example:

	      tcdemux -i big_dvd.vob -A	0xe0,0x81,0x20 > small_dvd.vob

	      extracts all packets for the video stream, AC3 audio  track  (1)
	      and the first subtitle stream (0).

       -M mode
	      Select synchronization strategy mode.  This is how transcode se-
	      lects the	beginning of a video and audio stream to  assure  both
	      streams are sychronized for further processing:

	      0	   no synchronization. Packets are printed directly to stdout.

	      1	   synchronization  based  on  PTS  information	 found	in the
	      packet header. Audio packets are delayed until a suitable	start-
	      ing point	is found. Default for PAL videos.

	      2	   NTSC	adapted	synchronization	mode. Detailed information for
	      each GOP contained in the	video stream are piped to a stdout  to
	      be processed by the certain import modules. This enables adjust-
	      ing the frame rate or inverse telecine, if necessary.

	      3	      more advanced synchronization mode 1 with	msec  granular
	      adjustment. Details delegated to transcode.

	      4	       more advanced synchronization mode 2 with msec granular
	      adjustment for NTSC materail. Details delegated to transcode.

	      5-7  undocumented	debugging modes	for internal use.

       -P file
	      Write GOP	meta information to file instead of tdout.

       -W     Print a navigation log file for a	given video stream to  stdout.
	      This is used for transcode's "psu	mode" and "cluster mode".

       -d level
	      With  this  option you can specify a bitmask to enable different
	      levels of	verbosity (if supported).   You	 can  combine  several
	      levels by	adding the corresponding values:

	      QUIET	    0

	      INFO	    1

	      DEBUG	    2

	      STATS	    4

	      WATCH	    8

	      FLIST	   16

	      VIDCORE	   32

	      SYNC	   64

	      COUNTER	  128

	      PRIVATE	  256

       -v     Print version information	and exit.

       tcdemux	is a front end for de-multiplexing program streams and is used
       in transcode's import modules.

       The command

       tcprobe -i movie.vob -x mpeg2

       extracts	only MPEG video	packets. Further processing, i.e.,  extracting
       the elementary video stream is done by tcextract.

       tcdemux was written by Thomas Oestreich
       <>   with  contributions  from
       many others.  See AUTHORS for details.

       avifix(1), avimerge(1),	avisplit(1),  tcdecode(1),  tcdemux(1),	 tcex-
       tract(1), tccat(1), tcscan(1), transcode(1)

tcdemux(1)		       09th January 2003		    tcdemux(1)


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