How to get info like window size, bytes in flight, MSS, RTT of a stream using a script.

My use case is : I will have two conversations(streams) separated out as pcap in a folder. I need to compare bytes in flight, window size, MSS value (both server advertised and client), avg RTT, number of retransmissions etc for these two flows. Is there any tool or script using tshark or other tools to get these info and populate to excel sheet. Basic is to parse the file and get these details, later i can manipulate how to present them. Looked on web, there are so many tools like pcaplusplus splitter etc, but i need cmd line options so that I can prepare a perl/python/bash script to automate this. Thanks in advance.