Save decrypted WPA packets to file using TShark

Hi,

I am trying to save the decrypted packets from a WPA2 network for further analysis using other tools that can't do the decryption. I am aware of the following answers but they both use wireshark. This is script running on a headless client so I cannot use "Export PDUs" in the wireshark menu.

https://ask.wireshark.org/questions/23606/decrypting-browser-https-wrapped-into-stunnel-ssl https://ask.wireshark.org/questions/30235/save-decrypted-wpa-packets-to-a-new-file

Any suggestions how to do that?

Thanks, Joseph