I found what I think is a bug in the plugin when converting a epub version of this into a KFX output, I don't know if the source was
Compatible epub or Advanced epub, the problem is when converting the epub I used it turned only this ebook with its images, into black square box's.
Spoiler:
I might of added a font into the source ebook but otherwise, I think its close to the original source, but again I cannot tell at this time if I used which source, also I added my own cover image to it, the alice in wonderland ebook is fine, the bug only seems to affect this ebook. as you can see I did something to the original epub from standard ebooks, that seems to cause all the images to turn into black boxes not sure what I had did to cause this, I did use polish books to update metadata and used it to add my own covers to some of them, I had added a font Amazon Amber, to the source epub then I used KFX output plugin, again I don't know why if I had used the adv epub or compatible source, I plan on going back to the original from their website, compatible epub in and try to reconvert it again, since I made some mistake along the way, that might of caused its images to turn into black box's but just in case it's not my fault I wanted to share, this eBook is going onto my kindle ebook reader, using USB-C connection onto device, I am using that cable with my kindle paperwhite signature 11th gen device, but I wanted to share this bug in cause something in the output plugin is causing this or again this might been just a mistake I had made that caused it, I am not sure since it's like the only ebook that I had seen this problem in, so I am not sure how I ended up with black images in the kfx output and yet the source epub seems fine, source ebook is too big for me to share it as a attachment. but I can share the directory sizes, the kfx output seems too small, and the images might of something happened to them when converting them, also I think I did use metaguide epub output which also might of cause this bug, since it does something to the epub that maybe the kfx output does not like. that's the only other idea I have which might of caused this but then again at this point I am guessing what
caused it.
I have calibre updated to 7.7 and all my plugins are up to date.
Also I went ahead and downloaded standard ebooks azw3 file of this ebook its smaller in size than the epub file, which is fine, I am using KindleUnpack plugin to make a epub (epub2 version) then I try metaguide epub on it, then convert that epub into kfx output to see if it causes the black images, instead of normal ones, in side the ebook itself, I know if the problem at that point might be that metaguide epub plugin if it is that plugin is going to get uninstall on my calibre.
update information to the process in understanding the bug which I don't really understand still but was able to fix anyway?:
converting azw3 downloaded from standard ebooks website then to epub with
KindleUnpack plugin, then using
metaguide epub plugin and that epub to kfx output seems to of worked, the
Amazon Ember font was included to the
KFX outputed ebook. below is a screenshot of the fixed ebook, again I used the azw3 source from the standard ebooks website, using the campatible epub source seems to cause the images to turn into black box's which again, I don't know why but the azw3 file outputed to an epub file using KindleUnpack then using metaguide and then using convert in calibre with included font, to
KFX format seems to of fixed my problem, again it was only one ebook that I noticed this bug in and I am still not sure why the epub file causes this bug, I am guessing there is some code in its file, that causes this, also I do not see any quality changes with its images, I don't think you lose quality going from epub to kfx vs using azw3 to epub to kfx output, I think the images look about the same.
I am fine if anyone wants to explain what caused this bug in the first place, at this point I have a working ebook file for my kindle with my own cover image on it, so I just will keep this info here if anyone can explain it?
Website link to ebook in question
https://standardebooks.org/ebooks/le...s/john-tenniel
These two screenshots below are showing the bug using compatible epub from standard ebooks website, which was updated with cover image and metadata using polish book in calibre, then converting that epub with font included to kfx output and as you can see it caused black box affect onto the kfx output, but the above image showing azw3 to epub using KindleUnpack seems to of fixed this bug
.
this is the png file fron Canva software, which I used to add text onto the source AI image bing image creator software page my oil painting prompt was a source for it.
this is a cover image, I used bing image creator, and used Canva to add text to it, basically I had made my own personal ebook covers for some of my public domain ebooks.
jpg image in calibre directory for this ebook
https://www.canva.com/
the source that added to calibre is in png but it outputs it to a jpg image anyway for ebooks, which is fine since it makes the image file size smaller which is fine for ebooks, but the source also gets turned into a jpg image file on devianart also. when saving it from Canva the source is png with text it in, that's just how the process works that I used. this website also seems to take the png file and downgrade it to an jpg file as an attachment, the bigger sized Attached Thumbnails, should be the png file, it seems to of converted it in this forum.
added link to png file below
and I added full image here as spoiler so it will not take up too much space.