Prism is the most stable and comprehensive multi-format video converter available and is very easy to use.
* Convert or compress video files within minutes
* Universal video converter supporting all popular formats
* Batch video conversion to convert thousands of videos
* Free version available for non-commercial use
Prism lets you set compression/encoder rates, resolution and frame rate of output files. Prism supports everything from HD to high compression for smaller files. You can even set a specific size for output files.