Help doing multi party voice call recording on the server

Hi community, i am newby related all the things related with video and audio containers, and I am trying to develop a multi party voice call app for things related with security so everything should be record, no matter which peer is the one who started the recording.
What I want to achieve is every time someone creates the room, start recording everything that happens there.
The feature of the voice call application room is working great using mediasoup.
When I try to do the recording following the demo shared in the documentation, I was only able to record only one peer. It is like ffmpeg process is consuming only one of the plain transports I am configuring.
My question is:
Is there any way for doing a single container file with all the producers of that room?
Thanks in advance, any help will be well received this is driving me crazy?