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M4B to MP3 (chapter separation), Converting M4B to multiple MP3s taking into account the M4B chapters
jaime11
post Sep 23 2009, 00:23
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Hello
I have been searching on the forum but haven't found anything. Basicly what I'm looking for is a program that will input a M4B file and output several MP3 files (1 MP3 per chapter in the M4B file).
I have been using Free M4B to MP3 Converter, but unfortunately, all it does is extract a single MP3 from the M4B.

Anyone knows any other programs for this job?

Thank you
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valekhz
post Dec 4 2010, 01:22
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If anyone is still interested I wrote a little python script to do this. You can find the git repository here: https://github.com/valekhz/m4b-converter. If you don't use git you can just download the python file here: https://github.com/valekhz/m4b-converter/raw/master/m4b.py.

You'll need python (only tested with 2.7 so far) and ffmpeg. Place the m4b.py somewhere and drag your *.m4b file onto m4b.py, or use the command line. There's a README in the git repository for more info on how to use it. I haven't been able to test that many .m4b files yet but those I've tried have worked great. I've tested it on Windows 7 and Ubuntu.

Basically it works by parsing the output of ffmpeg -i file.m4b to get the chapter data, encodes the audio and splits it based on the data from ffmpeg. Sorry if the code is a bit messy, haven't been coding in python for a while. smile.gif
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nbarzgar
post Dec 4 2010, 08:06
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QUOTE (valekhz @ Dec 4 2010, 02:22) *
If anyone is still interested I wrote a little python script to do this. You can find the git repository here: https://github.com/valekhz/m4b-converter. If you don't use git you can just download the python file here: https://github.com/valekhz/m4b-converter/raw/master/m4b.py.

You'll need python (only tested with 2.7 so far) and ffmpeg. Place the m4b.py somewhere and drag your *.m4b file onto m4b.py, or use the command line. There's a README in the git repository for more info on how to use it. I haven't been able to test that many .m4b files yet but those I've tried have worked great. I've tested it on Windows 7 and Ubuntu.

Basically it works by parsing the output of ffmpeg -i file.m4b to get the chapter data, encodes the audio and splits it based on the data from ffmpeg. Sorry if the code is a bit messy, haven't been coding in python for a while. smile.gif


Thank you, I also have been looking for this for weeks!
Now my problem: I get the message "no chapter information found", although iTunes shows them and ffmpeg parses a 'subtitle' stream... What can I do?
File-Info:
m4b_Info.txt


By the way, for other newbies in Python - like me - here a few (Windows-)hints:
1. DL Python 2.7 and install to directory of your choice.
2. The 'PATH' means the directory, where the Python-executable is stored (in my case it was the 'Python 2.7' dir created on HDD during install).
3. Download 'ffmpeg.exe' from here (for example, other sites exist) and put it in the same dir, as the Python-executable, i.e. the 'PATH'.
4. Put m4b.py into any directory, which has enough space for the .mp3-output files (of course, as valekhz points out you may change the output-dir by editing the .py file, but I wouldn't dare, never having come close to coding such things...)
5. Drag&drop m4b file onto the .py-file, wait (depending on CPU-power), find the new file(s) in a new subdirectory, called the same as the m4b...

Thanks again, valekhz!
Should you be able to help me on my above stated issue, I' be extremely grateful!!

This post has been edited by nbarzgar: Dec 4 2010, 08:36
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Posts in this topic
- jaime11   M4B to MP3 (chapter separation)   Sep 23 2009, 00:23
- - DVDdoug   NOTE - I've never seen an M4B file, so maybe s...   Sep 23 2009, 00:53
- - MostlyHarmless   Would you point me to a link with such file (m4b w...   Sep 23 2009, 09:17
- - tedgo   Have you tried foobar2000? It can handle m4a/m4b w...   Sep 23 2009, 10:06
- - jaime11   Hello Thanks to everyone with their fast replies.....   Sep 23 2009, 23:21
- - Zarggg   Is there any particular reason you need to transco...   Sep 24 2009, 16:10
|- - jaime11   QUOTE (Zarggg @ Sep 24 2009, 17:10) Is th...   Sep 24 2009, 16:56
|- - uberwolf   QUOTE (jaime11 @ Sep 24 2009, 15:56) QUOT...   Oct 29 2009, 01:03
- - Zarggg   If you don't have (lossless) sources, and you...   Nov 2 2009, 20:26
|- - uberwolf   My idea was to first convert the complete M4b file...   Nov 3 2009, 19:21
- - Zarggg   Have you tried using Audacity? I've had pretty...   Nov 4 2009, 16:56
- - HydrogenNoobie   Jamie11, Did you ever find a solution? I am looki...   Sep 20 2010, 05:22
- - valekhz   If anyone is still interested I wrote a little pyt...   Dec 4 2010, 01:22
|- - nbarzgar   QUOTE (valekhz @ Dec 4 2010, 02:22) If an...   Dec 4 2010, 08:06
|- - valekhz   Thank you for writing the guide, nbarzgar. QUOTE ...   Dec 4 2010, 13:25
- - nbarzgar   QUOTE (valekhz @ Dec 4 2010, 14:25) Thank...   Dec 5 2010, 06:02
|- - valekhz   QUOTE (nbarzgar @ Dec 5 2010, 06:02) I pu...   Dec 5 2010, 16:11
- - nbarzgar   VLC shows the chapters!! So now what would...   Dec 5 2010, 20:30
|- - valekhz   QUOTE (nbarzgar @ Dec 5 2010, 20:30) VLC ...   Dec 6 2010, 00:45
|- - nbarzgar   QUOTE (valekhz @ Dec 6 2010, 01:45) Aweso...   Dec 8 2010, 06:59
- - valekhz   I finally got the time to finish the script. Unfor...   Dec 10 2010, 22:42
|- - nbarzgar   QUOTE (valekhz @ Dec 10 2010, 23:42) I fi...   Dec 11 2010, 11:58
- - HydrogenNoobie   valekhz, Thank you so much for writing this scrip...   Dec 11 2010, 23:47
|- - valekhz   Unfortunately there's no Unicode support right...   Dec 12 2010, 19:02
- - daleybox   I ran into a couple of problems: 1) It was sayin...   Dec 13 2010, 03:36
|- - valekhz   Had some time to figure out the Unicode problem to...   Dec 13 2010, 22:59
|- - brian2090   QUOTE (daleybox @ Dec 12 2010, 21:36) ......   Feb 24 2011, 04:52
|- - alexf   thanks to valekhz for creating this script   Aug 23 2011, 22:40
- - HydrogenNoobie   Valekhz - I prefer no pre-pending of "Chapter...   Dec 13 2010, 23:37
- - HydrogenNoobie   valekhz, I hadn't seen your latest post when I...   Dec 13 2010, 23:50
- - HydrogenNoobie   Wow! I am both impressed and happy. Not only ...   Dec 14 2010, 06:33
|- - daleybox   Thanks so much for the chapter naming support, and...   Dec 14 2010, 14:19
|- - valekhz   QUOTE (HydrogenNoobie @ Dec 14 2010, 06:3...   Dec 14 2010, 20:37
- - HydrogenNoobie   Valekhz, 2. Ahh. I suspected that might be the c...   Dec 17 2010, 05:43
|- - valekhz   QUOTE (HydrogenNoobie @ Dec 17 2010, 05:4...   Dec 17 2010, 19:53
- - HydrogenNoobie   Valekhz, I just wanted to say thank you one last ...   Dec 27 2010, 20:08
- - valekhz   No problem, I'm glad it worked. I needed a fe...   Jan 3 2011, 16:55
|- - swavek   First off, many thanks to valekhz for building thi...   Oct 15 2011, 18:58
|- - cynepnaxa   Many thanks to valekhz! Note for customers. Va...   Jul 15 2012, 02:35
|- - cynepnaxa   QUOTE (cynepnaxa @ Jul 15 2012, 02:35) Va...   Jul 17 2012, 01:08
- - js2002   QUOTE (valekhz @ Dec 4 2010, 01:22) If an...   Jul 28 2011, 12:57
|- - js2002   fixed 1 problem in line 44: proc = subprocess...   Jul 28 2011, 14:55
- - ertdredge   As with everyone who's posted, major props to ...   Oct 16 2011, 03:57
|- - vitos   QUOTE (ertdredge @ Oct 16 2011, 04:57) As...   Aug 22 2012, 11:29
- - fyrebender360   Absolutely brilliant!!!! Thanks f...   Nov 9 2011, 23:23
|- - Jaantat   I tried all different versions but still it makes ...   Jun 16 2012, 15:30
|- - nmallears   QUOTE (Jaantat @ Jun 16 2012, 07:30) I tr...   Jun 18 2013, 17:15
- - theviki   If this is still relevant, I found an easier way. ...   Aug 31 2012, 12:48


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