the thread's title is quite misleading.
install and use
THIS , you might have to "play around" a bit with the options to get a perfect conversion but this freeware rules. If you double click on the file (after dragging+dropping it in the list of files to convert) you'll see the analisys of the media streams (audio and video), check those values and infos (video bitrate, audio bitrate,frequency etc) to get an idea of the values you have to put in for different file formats.