[1] RealVideo is supported on many platforms, including Windows, Mac, Linux, Solaris, and several mobile phones.
At the time, RealNetworks issued a press release saying they had licensed Iterated Systems' ClearVideo technology and were including it as the RealVideo Fractal Codec.
However, the open-source MPlayer project has now developed software capable of playing the RDT streams.
To facilitate real-time streaming, RealVideo (and RealAudio) normally uses constant bit rate encoding, so that the same amount of data is sent over the network each second.
Video with fast motion or rapidly changing scenes will require a higher bit rate.
Source code is available only under RCSL license for commercial porting to non-supported processors and operating systems.
[5] The official player for RealVideo is RealNetworks RealPlayer SP, currently at version 15, and is available for various platforms including Windows, Macintosh, and Linux.
However, FFmpeg's libav* libraries (and its DirectShow counterpart ffdshow) can play RealVideo and do not require RealPlayer or any parts thereof.
RealPlayer does not record RealVideo streams, and RealNetworks has advertised this feature to content owners such as broadcasters, film studios, and music labels, as a means of discouraging users from copying video.