Depending on what you want to edit and what platform you're on, you may be able to use other tools such as Tracewrangler, tcprewrite or Wireedit to accomplish your goal.
Those tools and more are listed at https://wiki.wireshark.org/Tools.
If a particular tool does not meet your needs, you could try contacting the author(s) to see if the tool could be enhanced so that it eventually would meet your needs.
- Chris
-------- Original message --------
From: Manik Khandelwal <manik123khandelwal@xxxxxxxxx>
Date: 11/22/17 11:22 AM (GMT-05:00)
To: Developer support list for Wireshark <wireshark-dev@xxxxxxxxxxxxx>
Subject: Re: [Wireshark-dev] Processing packet before exporting it.
I want to edit the bytes with full knowledge of structure.
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