use original cover

ilovejedd · 09-28-2011, 05:39 PM

Is there a tweak somewhere to force Calibre to use a specified cover image as-is without converting to JPG? I generated some very simple PNG covers between 5~10KB in size and the JPG Calibre makes are usually 20~40KB and have slight artifacts along the text edges. Since I often view the Calibre library from my phone, sometimes on EDGE speed (~200Kbps or 25KB/s), even the small bump in file size can be quite noticeable.

Thanks!

mikaelalind · 09-30-2011, 04:01 PM

The only thing I can think of is the Generate Cover plugin. Or maybe you can use the re-size cover plugin?

DoctorOhh · 09-30-2011, 04:21 PM

Quote:

Originally Posted by ilovejedd

Is there a tweak somewhere to force Calibre to use a specified cover image as-is without converting to JPG? I generated some very simple PNG covers between 5~10KB in size and the JPG Calibre makes are usually 20~40KB and have slight artifacts along the text edges.

I don't know of a tweak to use png vice jpg.

As a workaround you might want to use the tweak epub feature to explode the epub. Replace the the cover.jpg with cover.png. Use a editor like Notepad++ to edit the content.opf and the titlepage.xhtml files to reflect the png vice jpg. Then rebuild the file.

Good Luck.

09-28-2011, 05:39 PM	#1
ilovejedd hopeless n00b Posts: 5,110 Karma: 19597086 Join Date: Jan 2009 Location: in the middle of nowhere Device: PW4, PW3, Libra H2O, iPad 10.5, iPad 11, iPad 12.9	use original cover Is there a tweak somewhere to force Calibre to use a specified cover image as-is without converting to JPG? I generated some very simple PNG covers between 5~10KB in size and the JPG Calibre makes are usually 20~40KB and have slight artifacts along the text edges. Since I often view the Calibre library from my phone, sometimes on EDGE speed (~200Kbps or 25KB/s), even the small bump in file size can be quite noticeable. Thanks!

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09-30-2011, 04:01 PM	#2
mikaelalind Fanatic Posts: 590 Karma: 788068 Join Date: Sep 2009 Location: Sweden Device: Sony PRS 505, Cybook Odessey	The only thing I can think of is the Generate Cover plugin. Or maybe you can use the re-size cover plugin?

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