XMP Metadata in PDF - differents functions

[kovidgoyal]

Does not reproduce for me.

ebook-meta --series testme  t.pdf                                                                                                    
Original metadata::
	Title               : xxxaaa
	Title sort          : xxxaaa
	Author(s)           : R. Z. Bottema O. & Djordjevic
	Published           : 0101-01-01T00:00:00+00:00

Changed metadata::
	Title               : xxxaaa
	Title sort          : xxxaaa
	Author(s)           : R. Z. Bottema O. & Djordjevic
	Series              : testme #1
	Published           : 0101-01-01T00:00:00+00:00

[tribbleoo]

Ok. I see you try with standard column.
Can you please reconfirm it works with custom column also?

Here my examples:

First (without changes)

Title : v3_demo-
Title sort : v3_demo-
Author(s) : Unbekannt
Book Producer : PScript5.dll Version 5.2.2
Published : 0101-01-01T00:00:00+00:00
Identifiers : crc32:52368
CRC32 : 52368
Mein Titel : old
Ja/Nein : Ja

Secound (with changes and "Embed metadata" button)

Title : v3_demo-
Title sort : v3_demo-
Author(s) : Unbekannt
Book Producer : PScript5.dll Version 5.2.2
Published : 0101-01-01T00:00:00+00:00
Identifiers : crc32:52368
CRC32 : 52368
Mein Titel : old
Ja/Nein : Ja

Third (with changes and "Interface Demo Plugin" button)

Title : v3_demo-
Title sort : v3_demo-
Author(s) : Unbekannt
Book Producer : PScript5.dll Version 5.2.2
Published : 0101-01-01T00:00:00+00:00
Identifiers : crc32:52368
CRC32 : 52368
Mein Titel : meta

All these results are with this Preferences (pic 001,002,003)

[kovidgoyal]

And to demonstrate setting of custom column metadata

ebook-meta --from-opf ~/test\ library/Kovid\ Goyal/DOCX\ Demo*/*.opf t.pdf                                                            *
Original metadata::
	Title               : xxxaaa
	Title sort          : xxxaaa
	Author(s)           : R. Z. Bottema O. & Djordjevic
	Series              : testme #1
	Published           : 0101-01-01T00:00:00+00:00

Changed metadata::
	Title               : DOCX Demo
	Title sort          : DOCX Demo
	Author(s)           : Kovid Goyal & A B [Goyal, Kovid & b, a]
	Publisher           : Kovid Goyal
	Tags                : a1, a2, conversion, docs, ebook
	Series              : s #0
	Languages           : eng
	Published           : 2016-02-16T18:30:00+00:00
	Comments            : <div>
	<p>Demonstration of DOCX support in calibre</p>
	<p><a href="#library_id=test_library&amp;panel=book_list&amp;search=authors:%22%3DKovid%20Goyal%22&amp;sort=timestamp.desc"><span style="color: #6cb4ee">Search for Kovid Goyal</span></a><br><a href="calibre://show-book/_hex_-746573745f6c696272617279/2123"><span style="color: #6cb4ee">Sonnets</span></a></p>
	<p><a href="calibre://view-book/_hex_-746573745f6c696272617279/2123/EPUB?open_at=epubcfi(/12/2/4/2/10/42/2[f000012]/1:33)"><span style="color: #6cb4ee">Sonnet III</span></a></p>
	<p><a href="calibre://search/_hex_-746573745f6c696272617279?eq=6173696d6f76206f72206d6f6f7365"><span style="color: #6cb4ee">Test search in library</span></a></p></div>
	My Authors👨         : calibre
	My Comments         : <div>
	<p><em style="font-weight: 700">Testing2</em> extra <span style="color: #aa0000">comments</span></p>
	<p>Wowee2 ======== meow</p></div>
	My Date             : 13-03-2018
	Formats             : AZW3, DOCX, EPUB, ORIGINAL_AZW3, ORIGINAL_EPUB, PDF
	Genre               : Demos
	ISBN                : EMPTY
	My Enum             : Three
	Number              : 3336
	My Rating           : 4.5
	My Tags             : a, t1, t2
	My Title            : Nice formatting, no
	Yes/No              : Yes

[tribbleoo]

OK. I see you read the metadata from the opf and not direct from pdf. Right?

How look your solution from

ebook-meta file.pdf

One more thing i see is, with "Embed metadata" button i don't get a message, with "Interface Demo Plugin" button i get a message. See pics 008,009

[tribbleoo]

One more thing i see or find out
Its a different how the pdf was imported

If you Drag&Drop the PDF and you have follow Perferences, the functions from the Buttons looks equal
(Pic010)

If i Drag&Drop a PDF with Preferences like Pic003, the functions of the Buttons are different.

I am not shure is my fault or is a bug.

[kovidgoyal]

Originally Posted by tribbleoo

OK. I see you read the metadata from the opf and not direct from pdf. Right?

How look your solution from

ebook-meta file.pdf

One more thing i see is, with "Embed metadata" button i don't get a message, with "Interface Demo Plugin" button i get a message. See pics 008,009

No --from-opf is used to SET the metadata. It is set in the pdf and then read from there

[tribbleoo]

thx again for spent your time. Maybe i really missunderstood the function.
But why, with the one Button it writes the changed data direct to PDF or i can see the changes direct after push the button and why with the other button i get a different response in my PDF (no data changes)? This is what i don't understand.
If the function is the same, i think i must get with both buttons the same solutions. Right?

[kovidgoyal]

You are doing something different in the two cases. Cant help you with that.

[kamowski]

Originally Posted by tribbleoo

Hello,
as i wrote in my first post, this button can found inside the sample from manual creating plugins...

Calibre has its own directory for items that are in the library, along with its own database. When you add a PDF file to the library, it is saved in this directory and recorded in the database. At the same time, your original PDF file remains where it was. Now it is duplicated on your disk — delete it or keep it, as you prefer.

- The function in Calibre is used when adding a PDF document to the library; it retrieves the Author-Title-... from the metadata of the added PDF document OR extracts it from the file name and records it in the Calibre database.
- The function in the plugin works with a document that is already in the library. If you edit the metadata in library, it is automatically saved to the database, and this plugin also writes it directly into the PDF file in the Calibre directory.

If you don't use the plugin but want to have the metadata directly in the PDF file, set it in "Save to Disk" and then save the file to your disk. This is not written into the PDF file in the Calibre directory!