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Old 07-11-2021, 01:00 AM   #6
davidfor
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Posts: 24,905
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Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
Quote:
Originally Posted by DrChiper View Post
Also, Kobo software is picky about the fact that the used file extensions must match the file internal format. Hence, file extension .CBR (RAR compression) and file extension .CBZ (ZIP compression) must correspond to the file contents. I've seen myself that mismatched files did not show up in the e-reader.

You can check this with the aid of for instance the Notepad++ editor whether the first 2-4 bytes of the file (=magic number) corresponds with the extension:
  • CBR files must start with Rar!
  • CBZ files must start with PK
When needed, adjust the file extension to the real file internal format.
As well as that, the device does have some limitations on the file names involved. I don't know if the internal file names follow the same rules as the external file names. Calibre will massage the book file names so that they are correct. The rules it uses are probably stricter than what is needed, but, will work.

I think there is also a maximum level of directories in the comics. I recently saw this when I renamed an epub to .cbz and it wasn't imported. I have done this before with no issues, but, this time the images were at least three directories deep and it wasn't imported. I have loaded them with one level of subdirectory with no problems.
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