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oggz-chop(1)							  oggz-chop(1)

NAME
       oggz-chop  — Extract the part of an Ogg file between given start and/or
       end times.

SYNOPSIS
       oggz-chop [-o filename	|  --output  filename  ]   [-s	start_time   |
       --start	start_time  ]	[-e end_time  | --end end_time ]  [-k  | --no-
       skeleton ] filename

       oggz-chop [-h  | --help ]  [-v  | --version ]

Description
       oggz-chop chops a section of an Ogg file.  It correctly interprets  the
       granulepos timestamps of Ogg CELT, CMML, Dirac, FLAC, Kate, PCM, Speex,
       Theora and Vorbis bitstreams.  Run oggz-known-codecs(1) for a full list
       of codecs known by the installed version of oggz.

       The  output  file contains copies of the headers of the input file, and
       all the codec data required to correctly decode the content between the
       start  and end times specified on the commandline. For codecs with data
       dependencies like video keyframes, the keyframe prior to	 the  starting
       time will be included in the output.

       Note  that oggz-chop operates by copying pages of Ogg data; it does not
       strip partial packets from the first or last data page included in  the
       output.	It  does  however  ensure to set the end of stream flag on the
       last page of each logical bitstream.

       Skeleton handling: By default, the output will contain a Skeleton track
       specifying the start of the chop as presentation time.

Options
       oggz-chop accepts the following options:

   Output options
       -o filename, --output filename
		 Write output to the specified filename instead of printing it
		 to standard output.

       -s start_time, --start start_time
		 Specify the start time of the chopped section to output.

       -e end_time, --end end_time
		 Specify the end time of the chopped section to output.

       -k , --no-skeleton
		 Do NOT include a Skeleton bitstream in the output.

       -h, --help
		 Display usage information and exit.

       -v, --version
		 Output version information and exit.

EXAMPLES
       Extract the first minute of file.ogx:

	      oggz chop -e 1:00 file.ogx

       Extract from the second to the fifth minute of file.ogx:

	      oggz chop -s 2:00 -e 5:00 -o output.ogx file.ogx

       Extract, specifying SMPTE-25 frame offsets:

	      oggz chop -s smpte-25:00:02:03::12 -e  smpte-25:00:05:02::04  -o
	      output.ogv file.ogv

Server configuration
       The  following configuration for Apache httpd will enable oggz-chop. As
       with most Apache directives, this may of course be restricted  to  par‐
       ticular Directories or Locations:

       ScriptAlias /oggz-chop /usr/bin/oggz-chop

       Action application/ogg /oggz-chop

   HTTP/1.1 Cacheability
       oggz-chop  generates Last-Modified HTTP headers, and responds correctly
       to If-Modified-Since conditional GET requests.

AUTHOR
       Conrad Parker	    February 25, 2008;

COPYRIGHT
       Copyright © 2008 Annodex Association

SEE ALSO
       oggz-validate(1), oggz-merge(1), oggz-dump(1), hogg(1)

								  oggz-chop(1)

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