podeslany link do programu konwertujacego pomiedzy roznymi formatami. nie testowalem, ale program jest za free a reklamuje sie ostro:
„Don’t buy any video converter before trying Any Video Converter!

There is open source software to perform almost every task for video conversion. But if you are one of these windows users who are looking for an All-in-One video converting tool with easy-to-use graphical interface, Any Video Converter provides just that, allowing you to effortlessly convert video files between every format, for FREE!”