If you need a powerful video converter to deal with multi-format video files, give Quick Video Converter a try.
Although the Quick Video Converter interface isn't going to win any prizes, it allows you to convert, merge, extract audio or extract frames from your videos. It does so quickly and effectively, and has plenty of formats available, including AVI, FLV and PSP and iPod video.
The Quick Video Converter interface isn't the most user-friendly, so you'll have to take a few seconds to work out what's what. Once you've got that, however, just choose the function, the output folder and the format and off you go. Quick Video Converter also has a preview screen so you can check your progress, and a selection of sub-options for each format choice, so you can be sure to get exactly what you want.
If you are looking for a fast video converter for multiple formats, Quick Video Converter is the tool for you.