RMVB
From Free net encyclopedia
RMVB is an abbreviation for RealMedia variable bitrate. It is an extension of the RealMedia multimedia container format developed by RealNetworks.
As opposed to the more common RealMedia container, which holds streaming media encoded at a constant bit rate, RMVB is typically used for multimedia content stored locally. Files using this format have the suffix .rmvb.
RMVB files are typically much smaller in file size than their .mpeg formats, while still retaining reasonable quality. For this reason, they have become common among file-sharing protocols such as Bit Torrent. Support is now available in a wide variety of multimedia players, including the proprietary RealPlayer 10 and the open-sourced Media Player Classic, using an appropriate DirectShow filter.
Identifying characters
So the computer system can identify the file, the first 4 bytes of the file are ".RMF", which is 2E 52 4D 46 in hex.