extract(1) [centos man page]
EXTRACT(1) General Commands Manual EXTRACT(1) NAME
extract - determine meta-information about a file SYNOPSIS
extract [ -bghLnvV ] [ -H hash-algorithm ] [ -i ] [ -l library ] [ -p type ] [ -x type ] file ... DESCRIPTION
This manual page documents version 0.6.0 of the extract command. extract tests each file specified in the argument list in an attempt to infer meta-information from it. Each file is subjected to the meta-data extraction libraries from libextractor. libextractor classifies meta-information (also referred to as keywords) into types. A list of all types can be obtained with the -L option. OPTIONS
-b Display the output in BiBTeX format. -g Use grep-friendly output (all keywords on a single line for each file). Use the verbose option to print the filename first, fol- lowed by the keywords. Use the verbose option twice to also display the keyword types. This option will not print keyword types or non-textual metadata. -h Print a brief summary of the options. -i Run plugins in-process (for debugging). By default, each plugin is run in its own process. -l libraries Use the specified libraries to extract keywords. The general format of libraries is .I [[-]LIBRARYNAME[:[-]LIBRARYNAME]*] where LIBRARYNAME is a libextractor compatible library and typically of the form .Ijpeg. The minus before the libraryname indicates that this library should be removed from the existing list. To run only a few selected plugins, use -l in combination with -n. -L Print a list of all known keyword types. -n Do not use the default set of extractors (typically all standard extractors, currently mp3, ogg, jpg, gif, png, tiff, real, html, pdf and mime-types), use only the extractors specified with the .B -l option. -p type Print only the keywords matching the specified type. By default, all keywords that are found and not removed as duplicates are printed. -v Print the version number and exit. -V Be verbose. This option can be specified multiple times to increase verbosity further. -x type Exclude keywords of the specified type from the output. By default, all keywords that are found and not removed as duplicates are printed. SEE ALSO
libextractor(3) - description of the libextractor library EXAMPLES
$ extract test/test.jpg comment - (C) 2001 by Christian Grothoff, using gimp 1.2 1 mimetype - image/jpeg $ extract -V -x comment test/test.jpg Keywords for file test/test.jpg: mimetype - image/jpeg $ extract -p comment test/test.jpg comment - (C) 2001 by Christian Grothoff, using gimp 1.2 1 $ extract -nV -l png.so -p comment test/test.jpg test/test.png Keywords for file test/test.jpg: Keywords for file test/test.png: comment - Testing keyword extraction LEGAL NOTICE
libextractor and the extract tool are released under the GPL. libextractor is a GNU package. BUGS
A couple of file-formats (on the order of 10^3) are not recognized... AUTHORS
extract was originally written by Christian Grothoff <christian@grothoff.org> and Vidyut Samanta <vids@cs.ucla.edu>. Use <libextrac- tor@gnu.org> to contact the current maintainer(s). AVAILABILITY
You can obtain the original author's latest version from http://www.gnu.org/software/libextractor/ libextractor 0.6.0 Dec 20, 2009 EXTRACT(1)
Check Out this Related Man Page
EXTRACT(1) General Commands Manual EXTRACT(1) NAME
extract - determine meta-information about a file SYNOPSIS
extract [ -bghLnvV ] [ -H hash-algorithm ] [ -i ] [ -l library ] [ -p type ] [ -x type ] file ... DESCRIPTION
This manual page documents version 0.6.0 of the extract command. extract tests each file specified in the argument list in an attempt to infer meta-information from it. Each file is subjected to the meta-data extraction libraries from libextractor. libextractor classifies meta-information (also referred to as keywords) into types. A list of all types can be obtained with the -L option. OPTIONS
-b Display the output in BiBTeX format. -g Use grep-friendly output (all keywords on a single line for each file). Use the verbose option to print the filename first, fol- lowed by the keywords. Use the verbose option twice to also display the keyword types. This option will not print keyword types or non-textual metadata. -h Print a brief summary of the options. -i Run plugins in-process (for debugging). By default, each plugin is run in its own process. -l libraries Use the specified libraries to extract keywords. The general format of libraries is .I [[-]LIBRARYNAME[:[-]LIBRARYNAME]*] where LIBRARYNAME is a libextractor compatible library and typically of the form .Ijpeg. The minus before the libraryname indicates that this library should be removed from the existing list. To run only a few selected plugins, use -l in combination with -n. -L Print a list of all known keyword types. -n Do not use the default set of extractors (typically all standard extractors, currently mp3, ogg, jpg, gif, png, tiff, real, html, pdf and mime-types), use only the extractors specified with the .B -l option. -p type Print only the keywords matching the specified type. By default, all keywords that are found and not removed as duplicates are printed. -v Print the version number and exit. -V Be verbose. This option can be specified multiple times to increase verbosity further. -x type Exclude keywords of the specified type from the output. By default, all keywords that are found and not removed as duplicates are printed. SEE ALSO
libextractor(3) - description of the libextractor library EXAMPLES
$ extract test/test.jpg comment - (C) 2001 by Christian Grothoff, using gimp 1.2 1 mimetype - image/jpeg $ extract -V -x comment test/test.jpg Keywords for file test/test.jpg: mimetype - image/jpeg $ extract -p comment test/test.jpg comment - (C) 2001 by Christian Grothoff, using gimp 1.2 1 $ extract -nV -l png.so -p comment test/test.jpg test/test.png Keywords for file test/test.jpg: Keywords for file test/test.png: comment - Testing keyword extraction LEGAL NOTICE
libextractor and the extract tool are released under the GPL. libextractor is a GNU package. BUGS
A couple of file-formats (on the order of 10^3) are not recognized... AUTHORS
extract was originally written by Christian Grothoff <christian@grothoff.org> and Vidyut Samanta <vids@cs.ucla.edu>. Use <libextrac- tor@gnu.org> to contact the current maintainer(s). AVAILABILITY
You can obtain the original author's latest version from http://www.gnu.org/software/libextractor/ libextractor 0.6.0 Dec 20, 2009 EXTRACT(1)