Hi Genesius,
- Sanitize: You want to use TraceWrangler, made by Wireshark Contributor Jasper Bongertz.
- Remove TCP payload: Use editcap with a snaplen
- Remove packets: Filter them out with a display filter in Wireshark and then File > Export Specified Packets. In tshark, this is
tshark -r $file -Y "$display_filter" -w $filtered_file.
I agree with @cmaynard that checking out the Wireshark Tools page will help you.
Cheers
