Print Page - Two attempts required to write to xmp:About

Title: Two attempts required to write to xmp:About
Post by: robbie.morrison on April 06, 2017, 08:34:55 AM

Hello Phil

It seems to take a second attempt to get exiftool -xmp:About="xxxxx" to stick.

The PDF file itself is an export from Inkscape using a relatively simple illustration and opting to embed the fonts.

Here goes (and TIA, Robbie):

$ exiftool -duplicates -groupHeadings 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf

Code Select


---- ExifTool ----
ExifTool Version Number         : 10.48
---- File ----
File Name                       : 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf
Directory                       : .
File Size                       : 41 kB
File Modification Date/Time     : 2017:04:06 01:54:31+02:00
File Access Date/Time           : 2017:04:06 01:54:31+02:00
File Inode Change Date/Time     : 2017:04:06 01:54:31+02:00
File Permissions                : rw-r-----
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
---- PDF ----
PDF Version                     : 1.5
Linearized                      : No
Page Count                      : 1
Creator                         : cairo 1.14.6 (http://cairographics.org)
Producer                        : cairo 1.14.6 (http://cairographics.org)

$ exiftool -v5 -author="yyyyy" -xmp:About="xxxxx" 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf # first time

Code Select


Writing PDF:Author if tag exists
Writing PostScript:Author
Writing PNG:Author
Writing MIE-Doc:Author
Writing XMP-xmp:Author if tag exists
Writing XMP-acdsee:Author if tag exists
Writing XMP-pdf:Author
Writing XMP-rdf:About
======== 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf
Rewriting 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf...
  Editing tags in: MIE-Doc PDF PNG PostScript XMP
  Creating tags in: PDF XMP
    + PDF:Author = 'yyyyy'
  Creating XMP
    + XMP-pdf:Author = 'yyyyy'
    1 image files updated

$ exiftool -duplicates -groupHeadings 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf

Code Select


---- ExifTool ----
ExifTool Version Number         : 10.48
---- File ----
File Name                       : 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf
Directory                       : .
File Size                       : 44 kB
File Modification Date/Time     : 2017:04:06 01:55:51+02:00
File Access Date/Time           : 2017:04:06 01:55:51+02:00
File Inode Change Date/Time     : 2017:04:06 01:55:51+02:00
File Permissions                : rw-r-----
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
---- PDF ----
PDF Version                     : 1.5
Linearized                      : No
Page Count                      : 1
Creator                         : cairo 1.14.6 (http://cairographics.org)
Producer                        : cairo 1.14.6 (http://cairographics.org)
Author                          : yyyyy
---- XMP ----
XMP Toolkit                     : Image::ExifTool 10.48
Author                          : yyyyy

$ exiftool -v5 -author="yyyyy" -xmp:About="xxxxx" 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf # second time

Code Select


Writing PNG:Author
Writing PDF:Author if tag exists
Writing MIE-Doc:Author
Writing PostScript:Author
Writing XMP-pdf:Author
Writing XMP-acdsee:Author if tag exists
Writing XMP-xmp:Author if tag exists
Writing XMP-rdf:About
======== 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf
Rewriting 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf...
  Editing tags in: MIE-Doc PDF PNG PostScript XMP
  Creating tags in: PDF XMP
    - PDF:Author = 'yyyyy'
    + PDF:Author = 'yyyyy'
  Rewriting XMP
    - XMP-rdf:About = ''
    + XMP-rdf:About = 'xxxxx'
    - XMP-pdf:Author = 'yyyyy'
    + XMP-pdf:Author = 'yyyyy'
    1 image files updated

$ exiftool -duplicates -groupHeadings 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf

Code Select


---- ExifTool ----
ExifTool Version Number         : 10.48
---- File ----
File Name                       : 2017-ccl-d-flier-climate-dividend-cycle.en.02a.pdf
Directory                       : .
File Size                       : 44 kB
File Modification Date/Time     : 2017:04:06 01:56:32+02:00
File Access Date/Time           : 2017:04:06 01:56:32+02:00
File Inode Change Date/Time     : 2017:04:06 01:56:32+02:00
File Permissions                : rw-r-----
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
---- PDF ----
PDF Version                     : 1.5
Linearized                      : No
Page Count                      : 1
Creator                         : cairo 1.14.6 (http://cairographics.org)
Producer                        : cairo 1.14.6 (http://cairographics.org)
Author                          : yyyyy
---- XMP ----
XMP Toolkit                     : Image::ExifTool 10.48
About                           : xxxxx
Author                          : yyyyy

Title: Re: Two attempts required to write to xmp:About
Post by: Phil Harvey on April 06, 2017, 09:33:48 AM

Hi Robbie,

Good point, thanks. Writing XMP:About didn't work when creating new XMP in PDF files. This will be fixed in ExifTool 10.49.

Thanks for this report!

- Phil

Edit: Note that just writing XMP:About without any other tags still won't do anything if XMP didn't already exist because there must be something to be about.

Title: Re: Two attempts required to write to xmp:About
Post by: robbie.morrison on April 06, 2017, 11:22:56 AM

Hello Phil

Fantastic service.

many thanks and best wishes, Robbie

Title: Re: Two attempts required to write to xmp:About
Post by: robbie.morrison on April 11, 2017, 06:54:10 PM

Hello Phil

This problem is indeed fixed in 10.49.

many thanks, Robbie

Title: Re: Two attempts required to write to xmp:About
Post by: Phil Harvey on April 12, 2017, 07:21:33 AM

Hi Robbie,

Great! Thanks for the confirmation.

- Phil

ExifTool Forum

ExifTool => Bug Reports / Feature Requests => Topic started by: robbie.morrison on April 06, 2017, 08:34:55 AM