While I can't download and test it myself at the time [work], have you tried to download the newest version of the Xvid codec? Also, will this happen for each codec setting?
http://www.xvid.org/Downloads.15.0.html
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You mean the 1.7.0 Bandicam didn't have the latest Xvid codec ??
Anyway i am using Windows 7 x64 if that matter but i do record some other game like Mass Effect 2 , Crysis & Dirt 2 with Bandicam without any problem and yes i do try other codec setting as well but just sound , no video for Dirt 3 .
Thanx for the Xvid Codec download links but it doesnt solve the problem . Actually i believe for some reason bandicam only grab the game sound from Dirt 3 but not the video because normally a 10 second recording should sized around 25-35mb according to my usual setting but now its less than 200KB
(cause of new game graphic engine ?? game play in Directx 11 ??)
Thanx for helping and i hope this issue can solve asap cause i still prefer to record game using Bandicam than Fraps