I posted this to one board and was told that that was the wrong board, so I post it here, hoping that this is the right one... I have searched the archives and found a partial response to my question, but not fully. I realize that I can download the Mpeg-4 codec for the purpose of converting some .avi files to Mpeg-2, but is there a specific place to store the Mpeg-4 codec? I need a Microsoft High-Speed MPEG-4V3 to convert certain files. Know where I can get it? I use TMPGEnc for the conversion process but am wanting to try VirtualDub as well. Can anyone help? Thanks.