[FFmpeg-user] Stripping TrueHD / DTS-MA and leaving only the core

[Florian]

Hello,

I want to reencode the video track of some M2TS-files which have TrueHD and DTS-MA audio tracks.
Is it possible to strip these extensions so that the audio is only AC-3 and/or plain DTS?

I looked at the list of bitstream filters, but couldn't find anything...
Did I overlook something?
Is this being worked on?

Thanks,
Florian