converting from standard mobi to compressed mobi

noideaatall · 06-12-2010, 01:45 AM

I've got a directory of .mobi files and a device with not that much memory but which can read compressed mobi files. Is there some tool that can go through my directory and convert the mobi files to a mobi file with different specs?

I've googled this for ages - any2mobi has been mentioned for making copressed files but it looks like I would have to convert away from mobi so it could open the files which seems dumb and I cannot even find any2mobi - I think it used to come with calibre but doesn't anymore?

wallcraft · 06-12-2010, 12:51 PM

Calibre (via the GUI, or using ebook-convert), converting from mobi to mobi will compress the result. This does involve more than compression though, since Calibre will run though its standard ebook processing.

noideaatall · 06-12-2010, 01:14 PM

oh thanks, I'll stop going crazy trying to find how to do it then.

In this case most of my files should already be compressed. Odd they still seem larger then I would have expected an uncompressed text file to be. Oh well I can live with it.

wallcraft · 06-12-2010, 01:29 PM

Quote:

Originally Posted by noideaatall

In this case most of my files should already be compressed.

If you created them using Calibre a long time ago (at least a year ago), they will probably be uncompressed. The original Calibre MOBI output was uncompressed by default, but that was changed at some point.

noideaatall · 06-12-2010, 02:06 PM

some are old, some I got already as a mobi and may not be converted. So it seems like it might be a good idea to convert them all again.

I'm not finging it a little tricky to use the command line. I'd like to convert everything from one directory and put the new compressed files in another directory - to see how much smaller they are and avoid the file names clashing.

any idea how to do this?

pdurrant · 06-19-2010, 05:34 AM

Quote:

Originally Posted by noideaatall

some are old, some I got already as a mobi and may not be converted. So it seems like it might be a good idea to convert them all again.

I'm not finging it a little tricky to use the command line. I'd like to convert everything from one directory and put the new compressed files in another directory - to see how much smaller they are and avoid the file names clashing.

any idea how to do this?

I don't know how to do it with Calibre, but you could unpack the files with mobiunpack.py, and then re-compile with KindleGen. This should get you the highest compression with fewest changes to the files.

TWiTCommander · 07-11-2010, 04:10 PM

you can use kindlegen to achieve different levels of compression. i don't know if it will accept a mobi file as the source file though.

06-12-2010, 01:45 AM	#1
noideaatall Junior Member Posts: 4 Karma: 10 Join Date: Jun 2010 Device: kindle	converting from standard mobi to compressed mobi I've got a directory of .mobi files and a device with not that much memory but which can read compressed mobi files. Is there some tool that can go through my directory and convert the mobi files to a mobi file with different specs? I've googled this for ages - any2mobi has been mentioned for making copressed files but it looks like I would have to convert away from mobi so it could open the files which seems dumb and I cannot even find any2mobi - I think it used to come with calibre but doesn't anymore?

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06-12-2010, 12:51 PM	#2
wallcraft reader Posts: 6,977 Karma: 5183568 Join Date: Mar 2006 Location: Mississippi, USA Device: Kindle 3, Kobo Glo HD	Calibre (via the GUI, or using ebook-convert), converting from mobi to mobi will compress the result. This does involve more than compression though, since Calibre will run though its standard ebook processing.

06-12-2010, 01:14 PM	#3
noideaatall Junior Member Posts: 4 Karma: 10 Join Date: Jun 2010 Device: kindle	oh thanks, I'll stop going crazy trying to find how to do it then. In this case most of my files should already be compressed. Odd they still seem larger then I would have expected an uncompressed text file to be. Oh well I can live with it.

06-12-2010, 02:06 PM	#5
noideaatall Junior Member Posts: 4 Karma: 10 Join Date: Jun 2010 Device: kindle	some are old, some I got already as a mobi and may not be converted. So it seems like it might be a good idea to convert them all again. I'm not finging it a little tricky to use the command line. I'd like to convert everything from one directory and put the new compressed files in another directory - to see how much smaller they are and avoid the file names clashing. any idea how to do this?

07-11-2010, 04:10 PM	#7
TWiTCommander Member Posts: 20 Karma: 20 Join Date: Jul 2010 Device: kindle	you can use kindlegen to achieve different levels of compression. i don't know if it will accept a mobi file as the source file though.

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