iTunes also displays files with an m4b extension under audiobooks by default. One difference between the m4a and m4b extensions is that the option to remember the previous playback position in iTunes is enabled by default for files with an m4b extension but not for files with an m4a extension. The m4a and m4b extensions were originally introduced by Apple. mp4, m4a, and m4b are alternative filename extensions for the MPEG-4 Part 14 container format. To download a book from Audible as aax instead of aa, choose "Enhanced" from the "Audio Quality" dropdown in the view for downloading a book.Īax files are encrypted mp4 / m4a / m4b files so the ffmpeg command above does not re-encode audio and it preserves metadata such as chapters. If you try to use the ffmpeg command above with an aa file instead of an aax file, it results in an error like Option activation_bytes not found. (I edited the command above based on the comments by LiWang and marcus erronius to replace output.m4a mv output.m4 with output.m4b and to replace -vn -c:v copy with -c copy.) If your sed is GNU sed, replace sed -i '' with sed -i.Īfter that run a command like this: ffmpeg -activation_bytes youractivationkey -i input.aax -c copy output.m4b audible-activator.py results in an error like 'chromedriver' executable needs to be in PATH even if chromedriver is on the path or in the audible-activator directory. If you do not run the sed command that changes the value of the chromedriver_path variable. Then enter your Audible username and password and wait for a while for the eight character activation key to be printed. Sed -i '' 's,chromedriver_path = "./chromedriver",chromedriver_path = "/usr/local/bin/chromedriver",' audible-activator.py Step 2download and install the most powerful and easy-to-use Epubor Audible Converter to your computer.First run these commands: brew install chromedriver ffmpeg For detailed instructions, you can read the full guide on how to download Audible books on your computer. Step 1download Audible books from Audible websites or Audible App for Windows to your computer. Follow below step by step guide to convert AAXC to MP3. And all of your Audible books including the Romance titles can be downloaded in AAX format through Audible App for Windows.Īudible AAXC files can’t be converted to MP3 since now Audible added an address copyright protection to them, but a good workaround is to download Audible books as AAX format instead to convert to MP3 smoothly with Audible Converter software. For Audible books that you purchased (not borrowed), they can be downloaded in enhance format(.aax) from Audible website. It's like an added protection on Audible contents to avoid some users to convert them.įortunately, as long as you don’t download Audible Books through Audible App for Android, you can still get AAX files. And the main purpose of adopting this new AAXC format is to prevent Audible books from being decrypted and converted to any other format. Basically, the new AAXC format is just the same format as the AAX format with an address copyright protection to avoid Audible files from being converted to any other format.Ĭonfirmed in a phone call to Audible, AAXC is the new format that Audible is now using through Audible app, which means all the audiobooks downloaded from the new Audible App released on Jor later are saved in the AAXC format. The AAXC format is a new Audible format created in the latest released Audible App for Android and used for all Audible books downloaded through the app.
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