Magic Video Converter can convert and split almost any media format (Look at Supported Files) such as AVI, MPEG, MPEG 1, MPEG 2, MPEG 4, VCD, DVD, SVCD, RMVB, RM, and WMV and some new format such as .flv which is used on youtube, h.264, .mkv etc. Besides, it is compatible with DVD burning which is very easy to use. You can also create burning menu with it.
Magic Video Converter is a program that is very easy to use, it's simple and has a great interface. It works great with WIndows Vista.