Is a multimedia container for playing audio and video in karaoke mode. There are several options for playback, which switch off all of the streams. This format is supported by a few PC players, but is widely used for DVD-players and home theater systems.
As opposed to the more common RealMedia container, which holds streaming media encoded at a constant bitrate (CBR), RMVB is typically used for multimedia content stored locally. Files using this format have the file extension .rmvb.