I am facing an unusual problem in my system with video conversion. I am having 2 AVI files and there are no problems running the same in Windows Media Player. The issue is when I try to load it in virtualdub. One of the AVI files gives me the message that my system is missing the H264 codec. Next, I tried loading the other AVI file in virtualdub. This time, I got the message saying that the xvid is not present. I am not able to understand why this is happening. Is there any conflict between H264, xvid & virtualdub. I can assure you that these codecs are present in my system. Please help me on what has to be done to eradicate this problem.