Missing video header, how to restore

[bakayy]

Hello.

I have a AVI file without first 100 kb (looked in a HexEditor - this part of file is all zeros)

I don't know what codec and a resulution. File include also audio stream.
This video is recorded (not by me) in Camtasia (screen recorder).

No one program (like divFix ) doesn't work.

How is possible to restore. What I need. Maybe it's very important to try to find out what codec was used and its settings. Or maybe any program exists which could analize file and make header on the basis of it

[themaster1]

Try video fixer

[bakayy]

video fixer doesn't work
like all media fixer, Avi fixed, VirtualDubMod, divFix.

Here is NO header in a file.