Support of RealMedia is available in a few multimedia players for different architectures/platforms, including RealPlayer, the Real Alternative codec pack, and the open-source DAP firmware Rockbox.
It is a common audio format for consumer audio streaming or storage and a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players. MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio that uses lossy data compression. Typically these streams are in CBR, but a container for VBR streams, named RMVB, has been developed. It is typically used in conjunction with RealVideo and RealAudio and is used for streaming content over the Internet. RealMedia is a proprietary multimedia container format created by RealNetworks.
