Workflow to add a AAC compatibility track to MKV files

[ultradj83]

Dears,
I have 361 MKV files organized in a Artist / Title folder tree.
Such files usually have DTS or AC3 or LPCM or AAC audio tracks.
For those who don't have a AAC track, I need to add it to avoid compatibility issues with some players.

I'm in difficult in determining an automatic workflow for these.

Regards