Files that contain the .rmvb extension contain video files that can be played on a user's personal computer. The acronym "RMVB" stands for "RealMedia Variable Bitrate". The format was created by RealNetworks Inc.
The RMVB file format is perfect for distributing movies on the Web, as the file sizes are smaller than the traditional video formats even though the video quality is superior. This file format has become very popular in the distribution of Anime and Asian movies. File sharing programs such as BitTorrent and Emule are known to use the RMVB format along with other P2P file formats.
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