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Fascinating post. I wonder if anyone has tried to decode the Audible audiobook format - ".aa"?

by c-slice 11y ago

Daemon404 11y ago
FFmpeg would seem to already have this: http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavformat/aadec.c;h=266a8e85acd6a3fcb49014ae29632aaaf4a7302a;hb=HEAD http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavformat/a...
- AndrewUnmuted 11y ago
  For those who would like to decode an Audible AAX file with the FFmpeg binary itself, you may do so with the following: ffmpeg -activation_bytes 1CEB00DA -i test.aax -vn -c:a copy output.mp4 Taken from the docs. (http://ffmpeg.org/ffmpeg-all.html#Audible-AAX http://ffmpeg.org/ffmpeg-all.html#Audible-AAX)
  - noobie 11y ago
    Is it reversible though?
  - supersan 11y ago
    I've downloaded so much junk from the internet trying to do this but just couldn't and now I find it's so simple! Again, Thanks for sharing it. Who would have thought it would be so simple.
- steve19 11y ago
  THANK YOU!!! I have been wanting to backup my extensive audible library for years but could never find an easy solution. edit: I have not tried it yet, but this script seems to extract the key from audible https://github.com/inAudible-NG/audible-activator/blob/master/README.md https://github.com/inAudible-NG/audible-activator/blob/maste...
noobie 11y ago
Spotify's ".file" has been a tough one to crack.
- Wingman4l7 11y ago
  The only work I've seen on breaking Spotify DRM encryption was this[1], back in 2014 and discussed on HN here[2]. [1]: http://moyix.blogspot.com/2014/07/breaking-spotify-drm-with-panda.html http://moyix.blogspot.com/2014/07/breaking-spotify-drm-with-... [2]:
  - noobie 11y ago
    That is...genius!
- jevinskie 11y ago
  Apparently they actually tried unlike Grooveshark. [0] I don't think Grooveshark would have minded if someone cracked their "DRM" even while they were still in business. :) [0]: http://lgms.nl/blog-1 http://lgms.nl/blog-1
- voltagex_ 11y ago
  I'd actually be more interested in the database files that Spotify uses to manage cached tracks on Android - at the moment the UI is terrible, especially when you have 200+ tracks downloaded and are running out of space on your device. My goal is to write an 'ncdu' application to show what files/albums are using the most space.

Fascinating post. I wonder if anyone has tried to decode the Audible audiobook format - ".aa"?

by c-slice 11y ago

Fascinating post. I wonder if anyone has tried to decode the Audible audiobook format - ".aa"?

FFmpeg would seem to already have this: http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavformat/aadec.c;h=266a8e85acd6a3fcb49014ae29632aaaf4a7302a;hb=HEAD http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavformat/a...

AndrewUnmuted 11y ago
For those who would like to decode an Audible AAX file with the FFmpeg binary itself, you may do so with the following: ffmpeg -activation_bytes 1CEB00DA -i test.aax -vn -c:a copy output.mp4 Taken from the docs. (http://ffmpeg.org/ffmpeg-all.html#Audible-AAX http://ffmpeg.org/ffmpeg-all.html#Audible-AAX)
- noobie 11y ago
  Is it reversible though?
- supersan 11y ago
  I've downloaded so much junk from the internet trying to do this but just couldn't and now I find it's so simple! Again, Thanks for sharing it. Who would have thought it would be so simple.
steve19 11y ago
THANK YOU!!! I have been wanting to backup my extensive audible library for years but could never find an easy solution. edit: I have not tried it yet, but this script seems to extract the key from audible https://github.com/inAudible-NG/audible-activator/blob/master/README.md https://github.com/inAudible-NG/audible-activator/blob/maste...

noobie 11y ago

Spotify's ".file" has been a tough one to crack.

Wingman4l7 11y ago
The only work I've seen on breaking Spotify DRM encryption was this[1], back in 2014 and discussed on HN here[2]. [1]: http://moyix.blogspot.com/2014/07/breaking-spotify-drm-with-panda.html http://moyix.blogspot.com/2014/07/breaking-spotify-drm-with-... [2]:
- noobie 11y ago
  That is...genius!
jevinskie 11y ago
Apparently they actually tried unlike Grooveshark. [0] I don't think Grooveshark would have minded if someone cracked their "DRM" even while they were still in business. :) [0]: http://lgms.nl/blog-1 http://lgms.nl/blog-1
voltagex_ 11y ago
I'd actually be more interested in the database files that Spotify uses to manage cached tracks on Android - at the moment the UI is terrible, especially when you have 200+ tracks downloaded and are running out of space on your device. My goal is to write an 'ncdu' application to show what files/albums are using the most space.