3. RM / RMVB (Real Media) format (. RMVB. RM) (internal video coding RVx)
RM format is a RealNetworks company has developed a new type of streaming video file format, which arm of a total of three generals: RealAudio, RealVideo, and RealFlash. RealAudio is used to transmit near CD-quality audio data, RealVideo is used to transmit a continuous video data, while the RealFlash is RealNetworks collaboration with Macromedia's recently introduced a high compression ratio of the animated format. RealMedia network data transfer rate according to the different development of different compression ratio, thus achieving a low rate of wide-area networks, real-time image data transmission and real-time playback. Here we mainly introduced RealVideo, which in addition to ordinary video file format playback, you can also tie in with the RealServer server, first of all by RealEncoder responsible for the existing real-time video files into RealMedia format, RealServer is responsible for broadcasting RealMedia video files . In the data transmission can be side by side to download RealPlayer to play video images, without having to do like most video file, you must first download and then to play. At present, Internet already many websites using RealVideo technology for live coverage of major events.