RM (RealMedia) is a digital video file format developed by RealNetworks, Inc. for streaming audio and video content over the internet. The format is designed to provide high-quality streaming of audio and video content with relatively small file sizes.
RM files use the RealVideo and RealAudio codecs, which are optimized for streaming over the internet. The format supports variable bitrates, allowing for smoother playback of audio and video content on slower internet connections.
RM files can be played back on a variety of media players, including RealPlayer and VLC, and can also be converted to other more widely supported video formats like MP4 or AVI using compatible media conversion software.
Overall, RM is a useful video file format for streaming audio and video content over the internet, particularly for older websites that were designed to use RealMedia content. However, it is not as widely used as more modern video file formats like MP4 or MOV.