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Old 11-09-2012, 09:03 PM   #1
Pixelastic
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How can I remove Published Date from metadata using ebook-meta

Hi,

I'm trying to remove the metadata "Published Date" from the metadata of an epub file using `ebook-meta`.

I can change the value just fine, but do not find the way to completly remove it. If I pass a value of 0 or -1 it just convert it to a date, and any non-numeric string throws an error.

Here is what I tried so far :

Code:
ebook-meta input.epub --date='0'
ebook-meta input.epub --date='-1'
ebook-meta input.epub --date='-'
ebook-meta input.epub -d '0'
What is the correct way to remove this data ? With any string-based metadata I simply pass an empty string when I want to clear it, but an empty string as a different effect on a date.
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Old 11-09-2012, 09:08 PM   #2
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You cannot. Set the date to 1-1-101 and calibre will treat it as unknown.
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Old 11-10-2012, 12:46 AM   #3
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Thanks. Might be worth adding it to the `ebook-meta --help`.
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Old 11-10-2012, 12:52 AM   #4
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Oh, actually I posted without trying it first, and it does not seem to work.


Code:
$ ebook-meta input.epub --date=1-1-101
Original metadata::
	Title               : Le Bûcher d'un Roi
	Title sort          : Le Trône de Fer 13 - Le Bûcher d'un Roi
	Author(s)           : Georges R.R. MARTIN [MARTIN, Georges R.R.]
	Series              : Le Trône de Fer #13
	Languages           : fra
	Published           : 0100-12-31T12:00:00+00:00

Changed metadata::
	Title               : Le Bûcher d'un Roi
	Title sort          : Le Trône de Fer 13 - Le Bûcher d'un Roi
	Author(s)           : Georges R.R. MARTIN [MARTIN, Georges R.R.]
	Series              : Le Trône de Fer #13
	Languages           : fra
	Published           : 0100-12-31T12:00:00+00:00
Or maybe `ebook-meta` does not treat 1-1-101 as Unknown in read mode ?
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Old 11-10-2012, 12:53 AM   #5
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The calibre GUI will treat it as unknown, not ebook-meta
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Old 11-10-2012, 04:47 AM   #6
Pixelastic
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Ok thanks, this will do for now. Any plan for adding the ability to remove metadata (opposed to changing it) in the future ?

Also, I'd like to mention that I appreciate the quick answers from the creator of the tools himself!
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Old 11-10-2012, 05:11 AM   #7
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No plans.
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