I just downloaded Avidemux 2.6.0 and installed it. It won't let me open ACI files that i captured from my ZR600 camcorder. They are definitely AVI files, i captured them with Windows MovieMaker (WinXP) and they play with no problem in Media Player Classic, Windows Media Player, Quicktime, and RealPlayer.
What have i done wrong or set properly?
download avidemux 2.6.3 latest revision: http://www.avidemux.org/smf/index.php/topic,12078.0.html