RealPlayer, formerly RealOne Player (and at various times RealAudio Player, RealPlayer, and RealPlayer G2), is a cross-platform software product created by RealNetworks primarily used for the playing of recorded media. The media player is compatible with numerous formats within the multimedia realm, including MP3, MPEG-4, QuickTime, Windows Media, and multiple versions of the proprietary RealAudio and RealVideo formats.