Split rmvb into stems

Download and install the latest version of Filestar.
Right click on one or more Rmvb file(s) on your desktop and select Convert with Filestar.
Type split into stems in the search box.
Press Split.

What is .rmvb?

Name: RealMedia Variable Bit Rate File
Extension: .rmvb
Category: Video
Developer: RealNetworks
Description: An RMVB file is a Real Media video file compressed using a variable bit rate, which is optimized for the content of the video. It is a newer variation of the standard Real Media (.RM) file format that allows for more efficient compression.
MIME Type: application/vnd.rn-realmedia-vbr
Sample: sample.rmvb
Wikipedia: .rmvb on Wikipedia