RMVB
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| Filename extension | .rmvb |
|---|---|
| Internet media type | application/vnd.rn-realmedia-vbr |
| Magic number | 0x2E524D46 (".RMF") |
| Developed by | RealNetworks |
| Type of format | audio-visual |
RealMedia Variable Bitrate (RMVB) is a variable bitrate 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 file extension ".rmvb".
RealMedia uses compression similar to MPEG-4 Part 10 codecs,[1] such as x264.
RMVB files are extremely popular for distributing Asian content, especially Chinese television episodes and movies.[2] For this reason, they have become noticeably present (though not entirely popular) on file sharing platforms such as BitTorrent, eDonkey and Gnutella.[citation needed]
On the Windows platform, the proprietary RealPlayer SP, the open-sourced Media Player Classic and VLC Media Player support RMVB, using an appropriate DirectShow filter or Real Alternative. On Linux and other Unix-like platforms, MPlayer, xine, and Totem are able to play RMVB files using the open-source, reverse-engineered RMVB implementation in FFmpeg. The format is also supported for playback by the cross-platform VLC media player.
Contents |
[edit] Identifying characters
The file header for the format consists of the four bytes ".RMF" (hex 2E 52 4D 46), the same as the standard RealMedia format.
[edit] See also
- RealMedia
- RealVideo codecs
- RealAudio codecs
- Container format
- Comparison of container formats
- Comparison of video player software
[edit] References
[edit] External links
- RealMedia File Format
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