Manpages

JHEAD

NAME

SYNOPSIS

jhead [options] files...  

DESCRIPTION

This manual page documents briefly the jhead command.

This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. Instead, it has documentation in HTML format; see below.

jhead is a command line driven utility for extracting digital camera settings from the Exif format files used by many digital cameras. It handles the various confusing ways these can be expressed, and displays them as F-stop, shutter speed, etc. It is also able to reduce the size of digital camera JPEGs without loss of information, by deleting integral thumbnails that digital cameras put into the Exif header.  

OPTIONS

Note that jhead does not support the usual GNU command line syntax for both short and long options - only short options are supported. The summary of options included below is taken from the -h (help) output of the command.

-h

Show help and a summary of options.

-dc

Delete comment field (as left by progs like Photoshop & Compupic)
 

-de

Strip Exif section (smaller jpeg file, but loose digicam info)
 

-st name

Save Exif thumbnail, if there is one, in file <name>. If output file name contains the substring "&i" then the image file name is subsitute for the &i. Note that quotes around the argument are required for the '&' to be passed to the program. An output name of '-' causes thumbnail to be written to stdout.
 

-te name

Transfer exif header from another image file <name>. Uses same name mangling as '-st' option
 

-dt

Remove exif integral thumbnails and other non camera setting parts of exif header. Typically trims 10k.
 

-v

even more verbose output
 

-c

concise output
 

-model model

Only process files from digicam containing model substring in camera model description
 

-ft

Set file modification time to Exif time
 

-n[format-string]

Rename files according to date. If the optional format-string is not supplied, the format is mmdd-hhmmss. If a format-string is given, it is passed to the 'strftime' function for formatting This feature is useful for ordering files from multipe digicams to sequence of taking. Only renames files whose names are mostly numerical (as assigned by digicam) The destination name already exists, a letter or digit is added to the end of the name to make it unique.
 

-nf[format-string]

Same as -n, but rename regardless of original name
 

-ta<+|->h[:mm]

Adjust time by h:mm backwards of forwards. Useful when having taken picutres with the wrong time set on the camera, such as when travelling across time zones or DST changes.
 

-cmd command

Apply 'command' to every file, then re-insert exif and command sections into the image. &i will be substituted for the input file name, and &o (if &o is used). Use quotes around the command string.
 

SEE ALSO

The program is documented in the usage.html file that is included with the source distribution. Additional information is also available through the -h (help) option.  

AUTHOR

jhead was written by Matthias Wandel <mwandel@sentex.net> and may be downloaded directly from http://www.sentex.net/~mwandel/jhead

This manual page was written by Dave Baker <dsb3@debian.org> for the Debian GNU/Linux system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts.

Index

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

SEE ALSO

AUTHOR