Quote:
Originally Posted by DNSB
I don't think it has to do with the AES protection. I used Acrobat XI to generate a PDF openable with Acrobat 3 or higher and it worked. Used the same input file and set the output for Acrobat Level 8/PDF 1.7 (Acrobat X or higher) and it rebooted my Kobo. The stack error log looked the same as the one from opening the original Canon manual.
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Well, I cannot replicate that behaviour.
In my H2O the crashing only happens with AES-256bit.
I explain myself. I've downloaded Acrobat XI (trial period) just to test this issue. I'm no Acrobat/PDF expert so maybe I've done something wrong. Because of that I'm going to post all the steps I've made and I'm also uploading very simple test pdfs.
- I've started with a very simple pdf file from MS Word. This file is A very simple PDF - 1.6.pdf. 1.6 refers to the pdf version which you can change inside Acrobat. I've gone to Save As>>Optimized pdf file type>>Configuration and then I've changed the very first setting: Compatibility with Acrobat 7.x means pdf version 1.6, 8.x means 1.7, 9.x means 1.7 Extension Layer 3, 10.x means 1.7 Extension Layer 8.
(I also upload a screenshot: Adobe Acrobat XI - Compatibility setting (save as... optimized pdf).jpg. It's in Spanish but I suppose you can easily follow it. Please forgive me my "approximate" translations into English so maybe it's not actually Save As... optimized pdf but Save As.. Pdf advanced or anything similar).
- Then I've saved it with progressive increased versions. I upload the latest possible one: A very simple PDF - 1.7 Extension Level 8.pdf. This file DOESN'T CRASH MY H2O. So I'm not experiencing what DNSB says.
- Then I've gone to the file Properties>>Security Tab>>Security system: By password >> Change Configuration.
A new dialogue appears. I upload a new screenshot with the used settings (Adobe Acrobat XI - Permission setting.jpg). In this new screen you can set the Password length in an independent and additional compatibility drop box. "Adobe 7.x and later" means AES 128 bit and "Adobe X and later" means AES 256 bit.
- So I've saved two new files with 128 and 256bit protection (you can imagine their names
). Within these new files ONLY THE 256bit ONE CRASHES MY H2O. The 128bit runs fine.
- OTOH, that 256bit file also prevents Calibre from extracting the cover from it. Calibre is perfectly capable of extracting that cover from any of the other flavours of the pdf.
Could anyone of you confirm these tests, please? I mean, you should suffer a crash and reboot ONLY with the 256bit protected pdf. The rest of them should run fine.
If this issue is confirmed then it really seems that either Kobo or RMSDK has forgotten to implement the very last flavour of possible pdf...