[FFmpeg-user] Converting Audible AAX

[Moritz Barsnick]

On Thu, Jan 14, 2016 at 08:33:41 +0000, Robert Chalmers wrote:
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9684000000] [aax] file checksum == d72f1f04e3c73d0bc68e742db1bc69b58dc3a500
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9684000000] [aax] mismatch in checksums!
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9684000000] error reading header
> [AVIOContext @ 0x7f9683700420] Statistics: 32768 bytes read, 0 seeks
> Volume1.aax: Invalid data found when processing input

That's certainly the message when the activation key is incorrect. You
can provoke it on the sample by varying the initially correct key.

> However, this one works ….. Taken from the github site….
> ffmpeg -activation_bytes 62689101 -i Audible_AAX_sample_62689101.aax -vn -c:a copy -v debug output_sample.mp4

Now, is this a copy/paste error, or does your activation key really
happen to be the same as for the github sample? Note your command line:

> ffmpeg -activation_bytes 62689101 -i Volume1.aax -vn -c:a copy -v debug Voume1.mp4

Just wondering,
Moritz