Quote:
Originally Posted by carmenchu
I would add 'now'--not so long ago I was hearing the same about svg, wasn't I?
Personally, instead of trying to limit everybody to the intersection of what 'the most usual' would support, I would aim at using the better available and expect the 'the most usual' to update... they would, someday...?
Anyway, as lifelong reader, I would rather not voice my very personal opinion of editors and their policies--which I should thank instead for forcing me to learn english.
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Nothing to do with an editor. You try running an epub with webp images through epubcheck and you get error messages. That is enough to have your submission bounced back to you. You can try to explain to an automated process that your webp image is great and it doesn't matter that properties="cover-image" is not defined for a webp or that an image/webp media-type calls for a manifest fallback. Those were the two of the error messages I remember from submitting an epub with webp images.
And yes, automated pre-processing is rather popular since it saves humans from wasting their time on the "garbage in" files. Much like when interns got to read through the slush pile looking for the needle in the dung heap.