Convert Rmvb To Mp What Is The Best Way To Convert .rmvb Video?

What is the best way to convert .rmvb video? - convert rmvb to mp

I have many different programs and how to convert a video to RMVB. I want to play on my ipod touch to keep the quality as possible. But it seems that every time you do something when the video sound is off, making it almost impossible to see.

What would you recommend to convert. RMVB? I like this format because I was the format conversion and converts it to iPod touch converter with my favorite.

Thank you.