Any Video Converter
Any Video Converter is a free and open source application which you will be able to convert your video files with and make them to be supported by the most usual multimedia players.
If you are searching an application to perform file format conversions and share your videos easily with your friends, Any Video Converter is your piece of software.
It supports DivX, XviD, MOV, rm, rmvb, MPEG, VOB, DVD, WMV, AVI and more. It also converts formats which have become famous thanks to websites like YouTube, such as the FLV format.
It can be a really good choice for converting your videos and make them supported by your PSP or iPod.
And don't worry, if you don't know the output format file Any Video Converter will choose it automatically.