Strange book titles using moon+ reader

rufush · 01-29-2018, 04:09 AM

Wonder if anyone has an idea about this...
I've got a load of ebooks, converted by calibre into mobi format and have loaded them using usb from my windows 7 pc to a kindle fire hd 8 (2017) model.
Most of the titles are the same as the file name, but I have few where the filename is correct but the book title displays as something like CR!VXX4RB......
If I search for the proper book title title if finds the book but still displays it with the CR!... title

It only happens in moon+ reader, presario displays it fine.
Cant see any reference to the CR!VXX4.... title in the meta description or anywhere else !

any thoughts on where this "title" is being picked up from by mobi+ ?

Thanks Rufe

jhowell · 01-29-2018, 07:58 AM

In the original Mobipocket format the first 31 bytes of the file was used for the file name, typically containing the book title. In more modern books this field contains a unique identifier that starts with the characters "CR!", such as "CR!CCNGNFNTD51FD60RD7BTHNQ4KKXJ". Perhaps the reader software is failing to locate the metadata within the MOBI file and using that information instead.

copyrite · 01-29-2018, 08:12 AM

I've had this happen in the past in random books I've opened in Moon+ and found if I converted to epub deleted the mobi and converted back to mobi it would be fine. I'm not sure if any of my conversion settings play into this however.

rufush · 01-31-2018, 04:51 AM

Quote:

Originally Posted by jhowell

In the original Mobipocket format the first 31 bytes of the file was used for the file name, typically containing the book title.

Ah... a quick hex view of one of the offending files does indeed show the first 31 bytes as CR!........ whereas the MOBI books that display properly have the title in the the first 31.

Re-converting them from MOBI to MOBI in Calibre fixes it.

Wonder why moon+ uses the first 31 instead of the filename like other readers appear to use.
Thanks for the pointers.
Rufe

rufush · 01-31-2018, 04:53 AM

Quote:

Originally Posted by copyrite

.... and found if I converted to epub deleted the mobi and converted back to mobi it would be fine.

I converted MOBI to MOBI, and calibre renames the orginal mobi to... ORIGINAL_MOBI :-) ... the converted MOBI now looks "normal" :-)
Cheers for the tip.
Rufe

HarryT · 01-31-2018, 05:32 AM

Probably best to report this to the app developers.

Blossom · 01-31-2018, 05:48 AM

It's best use epub in this app. I find the mobi support severely lacking. Epub supports better formatting too.

Sent from my Nexus 7

HarryT · 01-31-2018, 05:51 AM

Quote:

Originally Posted by Blossom

It's best use epub in this app. I find the mobi support severely lacking. Epub supports better formatting too.

Yes, I agree entirely. Moon+ Pro is my preferred Android reader, and I always use it with ePub format, not Mobi.

Apache · 01-31-2018, 06:30 AM

My wife also prefers ePub with Moon+ Pro.
Apache

01-29-2018, 04:09 AM	#1
rufush Junior Member Posts: 5 Karma: 10 Join Date: Nov 2016 Device: samsung note 2	Strange book titles using moon+ reader Wonder if anyone has an idea about this... I've got a load of ebooks, converted by calibre into mobi format and have loaded them using usb from my windows 7 pc to a kindle fire hd 8 (2017) model. Most of the titles are the same as the file name, but I have few where the filename is correct but the book title displays as something like CR!VXX4RB...... If I search for the proper book title title if finds the book but still displays it with the CR!... title It only happens in moon+ reader, presario displays it fine. Cant see any reference to the CR!VXX4.... title in the meta description or anywhere else ! any thoughts on where this "title" is being picked up from by mobi+ ? Thanks Rufe

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01-29-2018, 07:58 AM	#2
jhowell Grand Sorcerer Posts: 7,157 Karma: 92500001 Join Date: Nov 2011 Location: Charlottesville, VA Device: Kindles	In the original Mobipocket format the first 31 bytes of the file was used for the file name, typically containing the book title. In more modern books this field contains a unique identifier that starts with the characters "CR!", such as "CR!CCNGNFNTD51FD60RD7BTHNQ4KKXJ". Perhaps the reader software is failing to locate the metadata within the MOBI file and using that information instead.

01-29-2018, 08:12 AM	#3
copyrite Wizard Posts: 1,841 Karma: 4985051 Join Date: Sep 2010 Location: Maryland Device: Kindle	I've had this happen in the past in random books I've opened in Moon+ and found if I converted to epub deleted the mobi and converted back to mobi it would be fine. I'm not sure if any of my conversion settings play into this however.

01-31-2018, 05:32 AM	#6
HarryT eBook Enthusiast Posts: 85,560 Karma: 93980341 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	Probably best to report this to the app developers.

01-31-2018, 05:48 AM	#7
Blossom Treasure Seeker Posts: 18,708 Karma: 26026435 Join Date: Mar 2010 Device: Kobo HD Glo, Kindles, Kindle Fires, Andriod Devices	It's best use epub in this app. I find the mobi support severely lacking. Epub supports better formatting too. Sent from my Nexus 7

01-31-2018, 06:30 AM	#9
Apache Readaholic Posts: 5,306 Karma: 90981752 Join Date: Sep 2011 Location: South Georgia Device: Surface Pro 6 / Galaxy Tab A 8"	My wife also prefers ePub with Moon+ Pro. Apache