My goal is to convert MKV files to AVI files that retain the original HD resolution, usually 1280x720 (i.e., 720p). An alternative would be to convert them to WMV9 format files, which also supports 720p. I downloaded the MKV to AVI converter, and then ponyed up $29.95 to unlock it. I downoaded all of the video codecs and audio filters. I downloaded gspot and avicode. The MKV files are good, and they do play when using VLC, TCMP, Zoom, etc. But I have not been successful in converting the MKV files to AVI files that are recognizable by the same players. I have tried DivX, Xvid, and WMV9 encoding, but the output of the converter is always an "unsupported format". With all of the various encoder settings, I suppose that I do not have the right combination for success. Does anyone have any helpful suggestions?