The interception of some of the video

I often cut popular programs such songs as part of the singer performing ~
now I use Total Video Converter Although the format to many, but not every interception rmvb must be converted to the format to format conversion on a very clear-cut hit 3 Minutes to be able to 1.3G ~ ~ ~ it's small size is not clear ~ ~ with the original video completely different ~
what software can be a clear-cut video also small size ~

/ soft / softdown.asp? softid = 28032
REALMEDIA EDITOR green version, but only for RMVB format