By default, RealPlayer can play RealAudio, RealVideo, and MPEG files. For a list of supported file types, visit the Media Types page in RealPlayer Help. It can also play other media types if the appropriate plug-ins and codecs (compression/decompression systems) are installed.
However, RealPlayer cannot play files that your computer does not recognize. To install the codecs required for your system to recognize other types of files, download and install the media player or its codec package that was originally designed to play back that media.
To install these free codecs for your system, choose one from the following list of media players with commonly-used codecs: