What is the best video converter and also editor program for windows xp?

I want to1- not miss synchronization between audio and video because of large video files or *.wmv files.2- good result from decoding for any file type to any type3- support to encoding well-known file types ( *.wmv, *.divx, *.avi, *.mpg, etc.)4- support splitting, cutting, joining, cropping, resizing5- support rewieving when on work