[FFmpeg-user] Audible aax files and concat demuxer

[Gyan]

On 04-09-2019 11:42 PM, Hans Carlson wrote:
> If I decode an audible aax file using the -activation_bytes option it 
> works fine for a single file, eg:
>
>   $ ffmpeg -activation_bytes XXXXXXXX -i part-1.aax -codec copy 
> part-1.mp4
>
> BUT if I try to concat multiple files using the concat demuxer it acts 
> like the -activation_bytes option isn't supplied.
>
> This feels like a bug?

It's a limitation. The concat demuxer doesn't accept options for the 
demuxers of the individual file entries. So, you'll have to process them 
individually first.

Gyan