There are more than thirty supported formats, so that no matter what extension your films and songs are in, it is more than likely that you will be able to convert it into your preferred format.
The program can convert various videos/songs simultaneously. In addition to this, you can alter all the parameters you want: video and audio bitrate, resolution, aspect ratio, etc.
Power Video/Audio Converter is a great converter, it's very fast and very easy to use.
The test version allows up to twenty uses, and only converts up to two minutes of any one video.