As the heir of RM format, RMVB format is developed based on RM format. RMVB, known as RealMedia Variable Bitrate, is a variable bitrate extension of the RealMedia multimedia container format developed by RealNetworks.

The RMVB files usually contain pieces of multimedia data compressed using the proprietary RealMedia compression algorithm. RealMedia codec uses compression similar to MPEG-4 Part 10 codecs, such as X264.

RMVB Codecs

RealMedia Splitter - RealMedia Splitter allows you to play RealNetworks audio/video files using Windows Media Player. You will need to install RealPlayer/RealOne Player or Real Alternative first.

Real Alternative Lite - allows you to play RealMedia files without having to install RealPlayer/RealOne Player. Supported: RealAudio (.ra .rpm), RealMedia (.rm .ram .rmvb .rpx .smi .smil), RealText (.rt), ReadPix (.rp), RealMedia embedded in webpages. .smi and .smil files.

x264 Video Codec - x264 is an open source H.264 (also known as MPEG-4 AVC) based video codec available for many platforms.

K-Lite Codec Pack Basic - With the K-Lite Codec Pack you should be able to play all the popular movie formats and even some rare formats.

FFDShow - A DirectShow and Video for Windows codec with support for a wide range of audio and video formats, such as Xvid, DivX, and H.264.

Other popular video codecs

• Media Player Codec Pack
• X Codec
• VSS Video Codec
• Etymonix MPEG-2 Video Codec
• DivX
• LEAD H.263 Video Codec
• Ut Video Codec Suite

More information about Codecs:

• If you want to install codecs compatible with your windows 7, you can go to Codec Pack for Windows 7.
• If you want to play your codec on Media players, you can have a look at this article - Free Download Codec Pack for Media Player.
• If you don't know how to encode and decode your file formats, this article is a must that is K-Lite Code Pack Review and Free Download.