Hi,
On the File Export window, there are other options on the right side in "Packet Format" section. You can select Packets Details -> All expanded, as well as packet bytes to get all sorts of data. See if that is what you need. You can probably also write a script to process the output file if you need the data in a different format.
Also if you right click on a packet in the packet list and go to Copy menu, there are several options. That may not work on multiple packets at the same time, but you might be able to find specific format that you can work with.
Thanks,
Abhijit