simplify cover upload on newer MTP based Kindles by replacing EBOK with PDOC

[axu2]

• fix Kindle CS 12 will not display covers #765

• fix PDOC vs EBOK option #685

• fix Kindle Scribe Cover generation after mtp firmware #508

• builds off Make it easier to add new profiles #764

Test builds:

https://github.com/axu2/kcc/releases/tag/v6.2.1-pdoc

https://github.com/axu2/kcc/releases/tag/v6.2.1-comicrack-pdoc

https://github.com/axu2/kcc/releases/tag/v6.3.0

The Kindle Colorsoft has been reported to not expose the system/thumbnails folder for covers, so here's a workaround and pre-built exe.

It just replaces EBOK tag with PDOC, so Kindle reads the cover directly from the file. Please test and tell me if it has issues.

Also, should I remove the ASIN tag?

And does anyone remember when pdoc covers started being read by Kindles? @Zappy86

[AcidWeb]

Please research this topic before blindly messing with headers. This affect a lot of things other than covers.

[axu2]

@AcidWeb Is there a list anywhere of differences? All I know is that EBOK was required in the past for covers but that isn't true now.

[AcidWeb]

No. It was never properly documented but it impact how e-reader handle such file. Covers are just a tip of the iceberg.

[axu2]

I see. I'll continue testing the files generated with this change and asking for feedback from testers. All I know is that EBOK was required in the past for covers but that isn't true now.

But for now my Scribe seems to read it just fine.

[AcidWeb]

If you plan to switch to PDOC then in general can drop entire code that modify headers and send cover thumbnails.

[axu2]

Will need to leave that code in for older kindles that can only get covers for EBOK. On mobile read a user confirmed it's still needed for kindle voyage on latest firmware.

[axu2]

Will tentatively force pdoc for these models:

    ProfilesKindlePDOC = {
        'KO': ("Kindle Oasis 2/3/Paperwhite 12/Colorsoft 12", (1264, 1680), Palette16, 1.8),
        'K11': ("Kindle 11", (1072, 1448), Palette16, 1.8),
        'KPW5': ("Kindle Paperwhite 5/Signature Edition", (1236, 1648), Palette16, 1.8),
        'KS': ("Kindle Scribe", (1860, 2480), Palette16, 1.8),
    }

Only way to get covers on colorsoft, doesn't require workaround for mtp based kindles. And a few extra ones that support pdoc covers.

[asilentdreamer]

Kindle 11th gen (2022) does not use MTP, its just 11th gen (2024). Will there be an option to distinguish between the two?

[axu2]

@asilentdreamer is there any reason to distinguish? It should still be able to read cover from PDOC. New method, you don't need to leave kindle plugged in.

[asilentdreamer]

I see. In that case there doesn't seem to be one.