Files that use the .rm file extension contain media files that are used by the RealNetwork's RealPlayer application. The RealPlayer is a computer application that streams audio and video data or links to streaming media files on the Internet. This allows users to watch or listen to the files in real time.
Files with the .rm extension contain compressed information. The data in the RM files is compressed using RealNetwork's RealAudio and RealVideo codecs, making them easier to distribute and store. Files with the .rm extension are commonly used to listen to Internet radio stations or to watch movies on the Web.
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If you have additional information about the RM file format or software that uses files with the RM suffix, please do get in touch - we would love hearing from you.