after reading
https://www.mobileread.com/forums/sho...d.php?t=100922
https://www.mobileread.com/forums/showthread.php?t=68188
I wondered if there are any addons that allow covers to be saved "untainted" because:
- every import (ex: from an exported folder) seems to recompress covers
- import via metadata editing recompresses too
Is there an addon / plugin that prevents that ?
(i think Quality Check isnt that useful for covers because of that recompression mentioned above)
the source code apparently always recompresses and thereby reduces image quality via src/calibre/ebooks/metadata/sources/covers.py
Code:
def save_cover_data_to(data, path, bgcolor='#ffffff', resize_to=None,
return_data=False, compression_quality=90, minify_to=None)
Shouldn't covers that are mentioned in metadata files be left untouched (copied instead of reprocessed)? Especially if I reimport from a folder with a .opf file ?
(Maybe implement lossless image covers via png or lossless jpeg?)
PS: i can only think of 2 "insurances" against that tainting so far
- have "good" (untouched) cover scans in a separate folder at hand/as backup
- integrated high quality covers in epub etc. format