Register Guidelines E-Books Search Today's Posts Mark Forums Read

Go Back   MobileRead Forums > E-Book Software > Calibre > Related Tools

Notices

Reply
 
Thread Tools Search this Thread
Old 04-19-2018, 06:08 AM   #1
AMF
Member
AMF began at the beginning.
 
Posts: 23
Karma: 10
Join Date: Jan 2015
Device: Kobo Glo
Irfanview to proportionally resize all covers

My library currently has just over 5,000 books in it. I never really worried about the cover sizes, until I noticed one specific book's cover was over 2Mb and the book itself was only 440kb. I realized I'm wasting an enormous amount of space on my Dropbox and backup drive. I used Irfanview to proportionally resize all covers so the long side is a maximum of 500 pixels long.

The whole exercise took less than a minute!
AMF is offline   Reply With Quote
Old 04-19-2018, 12:05 PM   #2
DNSB
Bibliophagist
DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.
 
DNSB's Avatar
 
Posts: 5,016
Karma: 21690670
Join Date: Jul 2010
Location: Vancouver
Device: Kobo Aura One, Aura H2O, Aura HD, Nexus 7 HD, iPad Air, Tolino epos
Quote:
Originally Posted by AMF View Post
My library currently has just over 5,000 books in it. I never really worried about the cover sizes, until I noticed one specific book's cover was over 2Mb and the book itself was only 440kb. I realized I'm wasting an enormous amount of space on my Dropbox and backup drive. I used Irfanview to proportionally resize all covers so the long side is a maximum of 500 pixels long.

The whole exercise took less than a minute!
Are the covers also embedded in your ebooks?
DNSB is offline   Reply With Quote
Old 04-19-2018, 12:35 PM   #3
theducks
Well trained by Cats
theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.theducks ought to be getting tired of karma fortunes by now.
 
theducks's Avatar
 
Posts: 22,136
Karma: 22087764
Join Date: Aug 2009
Location: (The original) Silicon Valley, USA
Device: K4NT, Galaxy Tab A
Quote:
Originally Posted by AMF View Post
My library currently has just over 5,000 books in it. I never really worried about the cover sizes, until I noticed one specific book's cover was over 2Mb and the book itself was only 440kb. I realized I'm wasting an enormous amount of space on my Dropbox and backup drive. I used Irfanview to proportionally resize all covers so the long side is a maximum of 500 pixels long.

The whole exercise took less than a minute!
Get the Resize Cover Plugin, That takes care of THE LIBRARY (GUI)
After that has been done: do as DNSB suggests: Embed so the book shrinks

Quality check Plugin to FIND which covers in the LIBRARY are big (does not check the book files. Embed after fixing)
theducks is offline   Reply With Quote
Old 04-20-2018, 12:50 AM   #4
AMF
Member
AMF began at the beginning.
 
Posts: 23
Karma: 10
Join Date: Jan 2015
Device: Kobo Glo
Quote:
Originally Posted by theducks View Post
Get the Resize Cover Plugin, That takes care of THE LIBRARY (GUI)
After that has been done: do as DNSB suggests: Embed so the book shrinks

Quality check Plugin to FIND which covers in the LIBRARY are big (does not check the book files. Embed after fixing)
It sounds like a lot of effort to achieve the same result. I literally used Irfanview to automatically resize all covers' longest side to 500 pixels if they were longer than that. I only looked at the biggest cover (size) and it was 3120 pixels high - that was enough reason to do the resize exercise.
AMF is offline   Reply With Quote
Old 04-20-2018, 01:54 AM   #5
davidfor
Grand Sorcerer
davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.
 
Posts: 15,279
Karma: 24761108
Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo: Touch, Glo, Aura H2O, Glo HD, Aura ONE, Clara HD
Quote:
Originally Posted by AMF View Post
It sounds like a lot of effort to achieve the same result. I literally used Irfanview to automatically resize all covers' longest side to 500 pixels if they were longer than that. I only looked at the biggest cover (size) and it was 3120 pixels high - that was enough reason to do the resize exercise.
You probably aren't achieving the same result. It sounds like you are resizing the cover.jpg in each book directory in calibre. This image is then embedded into the actual books at different points. If you resize the cover.jpg after the book has been updated, you won't be resizing the embedded version and have to do that again.

Also, but using an external tool to manipulate the calibre library, there is a higher chance of breakage. And it means that people need to learn how to use the tool to achieve the desired affect.

But, if you want the small cover size, I would think the simplest thing to do is use calibre to set the maximum size of the cover. There is a tweak in the calibre preferences to do this. When it is set, all large covers will be downscaled to this size when the book is added or the cover updated.
davidfor is offline   Reply With Quote
Old 04-20-2018, 08:21 PM   #6
DoctorOhh
US Navy, Retired
DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.
 
DoctorOhh's Avatar
 
Posts: 9,655
Karma: 13662888
Join Date: Feb 2009
Location: North Carolina
Device: Icarus Illumina XL HD, Nexus 7
Quote:
Originally Posted by AMF View Post
I used Irfanview to proportionally resize all covers so the long side is a maximum of 500 pixels long.
Good info and thanks for sharing what worked for you.

Moderator Notice
Since it had nothing to do with the Resize Cover plugin I moved it to its own thread.
DoctorOhh is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Covers not resize properly on IPad Mini 2 ShellShock Marvin 1 08-10-2015 06:24 PM
PRS-T1 Resize with Rupor-resize jessie102 Sony Reader Dev Corner 1 07-31-2015 02:49 PM
Feature Request: Resize covers BeeTee-Ess Library Management 16 08-01-2014 10:37 AM
How to resize my pdf? bthoven PDF 18 03-31-2010 11:52 PM
Resize PDF termn8er Astak EZReader 11 11-14-2009 05:26 PM


All times are GMT -4. The time now is 06:32 AM.


MobileRead.com is a privately owned, operated and funded community.