Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
mpgtx(1)			  User manual			      mpgtx(1)

       mpgtx,  mpgsplit,  mpgcat, mpgjoin, mpginfo, mpgdemux - manipulate mpeg

       mpgtx command [ options ] file [	range |	file ] ...

       mpgtx can split and join	MPEG files in various ways. Three  file	 types
       are  currently handled (more to come): MPEG 1 Video files, MPEG 1/2 Au-
       dio files (mp1, mp2, and	mp3), MPEG 1 System  files  (audio  and	 video
       files),	MPEG  2	 Program  files	(Experimental),	MPEG 2 Transport files
       (demultiplex and	info modes only).  mpgtx is a GOP (Group of  Pictures)
       based  editor. This means that mpgtx cuts MPEG files on a Group Of Pic-
       ture basis, not on a frame-by-frame basis. A typical  GOP  duration  is
       about  0.5  sec	(approx.  15 frames), limiting the maximum accuracy of

       -i     prints information about files, such as duration,	dimention, bi-
	      trate, etc.

       -j     joins files (ranges may be specified, see	the RANGES section).

       -s     splits  files  according to the specified	ranges (see the	RANGES

       -d     demultiplexes composite mpeg file.

       -T     manipulates ID3v1	tags from mp3 files (see tagmp3(1)).

       -h     prints a (not so)	short help message.

       -v     prints version and exit.

       -#     where # is a number, splits the given files in # parts.

	      enables joining of incompatible files (some players are very ro-

	      prevents	mpgtx  to try to catch SIGSEGV signal. This is usefull
	      for debugging.

       In addition, when invoked with the  names  mpgjoin,  mpgcat,  mpgsplit,
       mpgdemux,  tagmp3  or  mpginfo,	mpgtx will modify its behaviour	in the
       following ways:
       mpginfo behaves as mpgtx	-i
       mpgsplit	behaves	as mpgtx -s
       mpgjoin behaves as mpgtx	-j
       mpgcat behaves as mpgtx -j -o -
       mpgdemux	behaves	as mpgtx -d
       tagmp3 behaves as mpgtx -T

       -f     force overwriting	of files, never	ask.

       -Ax    Change aspect ratio of mpeg. Valid are  1,2,3,4  for  1:1,  4:3,
	      16:9, 2.2:1

       -P     Keep junk	or unusual headers in splits

       -X     Desperate	 mode, search the whole	movie for a valid PACK.	In ad-
	      dition with option -N no search information will	be  displayed,
	      only the end summary.

       -N     Suppress	progress  output to the	console. Speeds	up operation a
	      little on	most Systems and much on Macintosh OS9.
	      Suppress time line check in mpginfo mode.

       -b NAME
	      each output file will have the basename NAME

       -o FILE
	      FILE will	be used	as the output file (used with  the  join  com-
	      mand). if	FILE is	-, standard output will	be used.

       Each range must follow a	filename or another range.  A range in an MPEG
       file can	be specified using one of this three notations:	Note  for  OSX
       Users: Ranges must be enclosed in single	or double Quotes!

       [a-b]  from  value  a  inclusive	to value b inclusive. If you want half
	      opened ranges, you may want to use ]a-b],	[a-b[ or ]a-b[.

	      the n th part out	of ntot.  [1/4]	 would	result	in  the	 first
	      quarter of the specified file.

	      with  a  ,  b , ...  in ascending	order. Split specified file at
	      given boundaries.	{55M} therefore	means from beginnig of file to
	      55Megs and from 55Megs to	the end	of file.

       Values of ranges	can be specified in seconds or as a byte offset.

       Time Format
	      HH:MM:SS.SS where	the HH:	part can be omited

       Offset Format
	      a	number optionally followed by M	for Megabytes k	for kilobytes

       Omitted Values
	      An  empty	 value is valid	and is equivalent to the corresponding
	      file boundary:
	      [-10M] are the first 10 Megabytes	of the file.
	      [1:10:04-] from 1	hour 10	minutes	4 seconds to the end of	file.

       All programs return 0 upon successful completion	and 1 on failure.

       mpgjoin movie1.mpg [-0:32] [45M-75M] movie2.mpg -o joined.mpg
	      joined.mpg will contain the first	32 seconds of movie1.mpg  fol-
	      lowed  by	 30 Megs of movie1.mpg starting	at 45 Megs followed by
	      the whole	file movie2.mpg

       mpgtx -124 myfile.mpg -b	output
	      will split myfile.mpg in 124 parts with names output-001.mpg  to

       mpgtx -i	Wazzup.mp3
	      will print infos about given file	such as	duration, bitrate, but
	      also album, track, song name if this file	has an ID3 tag.

       mpgcat myfile.mpg [2/2] | lpr
	      will redirect the	second half of	myfile.mpg  to	your  printer,
	      emptying	it  from toner and paper and make you be fired by your
	      boss... Use carefully.

       Plenty of them :)
       GOP (Group of Picture) based: well this is not a	bug but	it's a limita-
       tion. As	explained in the DESCRIPTION section, this limits the accuracy
       of mpgtx	on joins and splits to approximately 15	frames,	 or  0.5  sec-
       Some  artifacts can be seen with	bad MPEG players playing joined	files.
       These players don't take	into account the broken	link flag used to dis-
       card the	first B	frames they encounter. This is a bug in	their MPEG de-
       coding engine, not mpgtx.

       Laurent Alacoque	<>	CopyLeft 2001.
       Modified	by Chris Danis <>, copyleft 2001.
       Philipp Biermann	<>,	copyleft 2002.
       Erik Schanze <>, copyleft	2004.
       Get new releases	and information	from, and send patches,	 bugs,	girls,
       money etc. to:

       for your	attention. Have	a good day.
       Godmar  Back  and Brent Phillips	helped me to tune the command line in-
       Volker Moell patiently teach me how to build rpms. Danke	Volker.
       Jean Fransisco Sytem (alias Nicolas Schieli)  helped  me	 correct  some
       nasty bugs.
       Thank you guys.

Linux				 DECEMBER 2004			      mpgtx(1)


Want to link to this manual page? Use this URL:

home | help