tcdemux man page on DragonFly

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tcdemux(1)							    tcdemux(1)

NAME
       tcdemux - demultiplex a program stream

SYNOPSIS
       tcdemux
	      -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 ]

COPYRIGHT
       tcdemux is Copyright (C) by Thomas Oestreich.

DESCRIPTION
       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.

OPTIONS
       -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
	      eleminate	 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
	      selects 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.

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

EXAMPLES
       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.

AUTHORS
       tcdemux was written by Thomas Oestreich
       <ostreich@theorie.physik.uni-goettingen.de>   with  contributions  from
       many others.  See AUTHORS for details.

SEE ALSO
       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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