#Exiftool options pdf#
#Exiftool options update#
#Exiftool options windows#

So ExifTool alone may not be used to securely edit metadata in PDF files.Ĥ) Specifying -GROUP:all= deletes the entire group as a block only if a single family 0 or 1 group is specified.

#Exiftool options update#

This avoids many potential problems, including the inevitable compatibility problems with OEM software which may be very inflexible about the information it expects to find in the maker notes.ģ) Changes to PDF files by ExifTool are reversible (by deleting the update with -PDF-update:all=) because the original information is never actually deleted from the file.

If two assignments affect the same tag, the latter takes precedence (except for list-type tags, for which both values are written).Ģ) In general, MakerNotes tags are considered 'Permanent', and may be edited but not created or deleted individually. Deleting EXIF only removes ExifIFD which also deletesġ) Many tag values may be assigned in a single command. Deleting ExifIFD also deletes InteropIFD and MakerNotes. GPS, IFD1, InteropIFD, MakerNotes, PrintIM and SubIFD. Deleting EXIF or IFD0 also deletes ExifIFD, GlobParamIFD, Also, within an image some groups may be contained within others, and these groups are removed if the containing group is deleted: JPEG Image: Use the -listd option for a complete list of deletable groups, and see note 5 below regarding the 'APP' groups.

However, color space information is removed, so the colors may be affected (but this may be avoided by copying back the tags defined by the ColorSpaceTags shortcut). Note that not all groups are deletable, and that the JPEG APP14 'Adobe' group is not removed by default with -All= because it may affect the appearance of the image. A tag name of All is equivalent to * (except that it doesn't require quoting, while arguments with wildcards do on systems with shell globbing), and is often used when deleting all metadata (ie. When specified with wildcards, 'Unsafe' tags are not written. The wildcards * and ? may be used in tag names to assign the same value to multiple tags. The preferred group in JPEG and TIFF-format images is the first group in the following list where TAG is valid: 1) EXIF, 2) IPTC, 3) XMP. If no group name is specified, the tag is created in the preferred group, and updated in any other location where a same-named tag already exists. TAG may contain one or more leading family 0, 1, 2 or 7 group names, prefixed by optional family numbers, and separated colons.

#Exiftool options windows#

^= is used to write an empty string instead of deleting the tag when no VALUE is given, but otherwise it is equivalent to =, but note that the caret must be quoted on the Windows command line. += may also be used to increment numerical values (or decrement if VALUE is negative), and -= may be used to conditionally delete or replace a tag (see 'WRITING EXAMPLES' for examples). += and -= are used to add or remove existing entries from a list, or to shift date/time values (see Image::ExifTool:: and note 6 below for more details). comment=wow), or delete the tag if no VALUE is given (eg. Write a new value for the specified tag (eg. Exiftool Application Documentation exiftool Application DocumentationĮxiftool - Read and write meta information in files SYNOPSIS ReadingĮxiftool FILE.