What's a good program for editing .AVI movies of large file sizes?

Hi, maybe it's the video codec issue. avi is a media container which can be encoded with many different codecs, so windows movie maker just supports some special avi videos. as I know, WMM supports wmv or mpeg2 videos well, so you need to use a good software to convert your avi videos to the wmv or mpeg2 videos for WMM. I am using RZ Video Converter which can convert any videos or audios between different formats with good quality, such as convert avi videos to the wmv or mpeg2 videos for WMM, etc. Then you can import the converted videos to WMM, and edit them. yahoo or google search and download RZ Video Converter, hope it can help you.