epub image (WebP format) couldn't get into the mobi format

Bug #1922341 reported by ldnbngnpofpgdsxwei@upived.online
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
calibre
Fix Released
Undecided
Unassigned

Bug Description

I created a .epub file in Sigil, using WebP as images. I attached the link of my file below:

https://mega.nz/file/cJdUwBha#ns0_b7Fy2h7vebsYaOWH_iU8u9uYeCtrJuHraSeM7Y8

I then add this file into Calibre and convert the file into mobi format. After the conversion is completed I read the mobi file and find that the image inside the chapter is missing (The cover image is correctly converted but the image inside the chapter is missing). To access the first chapter, you need to open the TOC and go to the first item inside PART 1.

Thank you very much

summary: - WebP epub couldn't get converted properly
+ epub image (WebP format) couldn't get into the mobi format
Revision history for this message
Kovid Goyal (kovid) wrote : Re: calibre bug 1922341

webp is not a valid image format for EPUB 3.0, dont use it.

That said, I can fairly easily have the mobi output plugin
convert these images to png as needed.

Revision history for this message
Kovid Goyal (kovid) wrote : Fixed in master

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased

Changed in calibre:
status: New → Fix Released
Revision history for this message
ldnbngnpofpgdsxwei@upived.online (ldnbngnpofpgdsxwei) wrote :

Thanks a lot

I tried adding WebP in my EPUB because it is included in EPUB v3.3 and it provides better image quality than JPG.

https://www.w3.org/TR/epub-33/#sec-cmt-supported

In the meantime for compatibility I would use WebP.

Revision history for this message
ldnbngnpofpgdsxwei@upived.online (ldnbngnpofpgdsxwei) wrote :

I mean I would use JPEG

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