File type: RealVideo Variable Bit Rate
The RMVB file extension is used for the Real media Variable Bitrate (RMVB) files. The RMVB files usually contain pieces of multimedia data compressed using the proprietary RealMedia compression algorithm.
The video and audio streams are divided into different segments. Each segment is then encoded with different bitrates based on the complexity of the data, as well as the relative importance of the segments contained in it.
They are also optimized to allow streaming over the Web. The RMVB files may be opened using the Media Player Classic, Real Alternative, or RealPlayer codec set.