MobileRead Forums - View Single Post - KindleUnpack (MobiUnpack): Extracts text, images and metadata from Kindle/Mobi files

KevinH · 06-26-2014, 12:16 PM

Hi Doitsu,

From the looks of what you sent, yes your PW2 does NOT use or read apnx files. Instead it downloads into sidecar two files. The first is the .azwf which includes history and timing info (almost like the .mbp file). The second is an .azw3r that keeps the apnx data but converted into some other strange format.

It almost looks like the .azw3r file is a json or other serialized object version of both an annotation.cache.object, and an apnx.key. The apnx.key has the exact same pagemap information except for completely out of order and with some extra pieces I am not sure about. It may in fact be a serialized java object, a serialized json object, or some other object serializer used for storage and retrieveal in a binary file.

So it looks like creating an apnx for a PW2 is not going to be helpful. Sorry about that. But Amazon seems to keep going out of its own way to create a support nightmare for itself with all of its different machine specific formats.

I will look into the off by one on the KW and see if I can track down why that is happening. Hopefully I can add a fix for that.

Thanks for testing things and providing the sidecar files which helped me track down where the apnx was being stored on the PW2.

06-26-2014, 12:16 PM	#818
KevinH Sigil Developer Posts: 8,893 Karma: 6120478 Join Date: Nov 2009 Device: many	Hi Doitsu, From the looks of what you sent, yes your PW2 does NOT use or read apnx files. Instead it downloads into sidecar two files. The first is the .azwf which includes history and timing info (almost like the .mbp file). The second is an .azw3r that keeps the apnx data but converted into some other strange format. It almost looks like the .azw3r file is a json or other serialized object version of both an annotation.cache.object, and an apnx.key. The apnx.key has the exact same pagemap information except for completely out of order and with some extra pieces I am not sure about. It may in fact be a serialized java object, a serialized json object, or some other object serializer used for storage and retrieveal in a binary file. So it looks like creating an apnx for a PW2 is not going to be helpful. Sorry about that. But Amazon seems to keep going out of its own way to create a support nightmare for itself with all of its different machine specific formats. I will look into the off by one on the KW and see if I can track down why that is happening. Hopefully I can add a fix for that. Thanks for testing things and providing the sidecar files which helped me track down where the apnx was being stored on the PW2.