DSM Converter
DSM converter was made for transformating files from almost all supported containers to new one - DSM (Direct Show Media). Doesn't work with Quick Time, converted RealMedia files sometimes fail to play.
Don't forget about the context menu while working with converter, because almost all its functions (operations on files, streams, resources) are available only this way. Each resource type has its own context menu: you can set tags for audio and video streams, add files to the resources folder and set chapters.