How to play audio from ffmpeg?

[Manieck71]

What do you mean by "built-in headphones"? The earpiece? Or the headphone port (but then the headphones are not "built-in", only the port is)?

The former can be selected with:
pactl set-sink-port 0 '[Out] Earpiece'
the latter with:
pactl set-sink-port 0 '[Out] Headphones'
and to switch back to the speaker, use:
pactl set-sink-port 0 '[Out] Speaker'

Yes, I mean the earpiece.

Thank you, it works!