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Filename extension
.rm, .rma, .rmi, .rmv, .rmvb, .rmhd, .rmm, .ra, .ram
Internet media typeapplication/vnd.rn-realmedia
Uniform Type Identifier (UTI)com.real.realmedia[1]
Developed byRealNetworks
Type of formatContainer format
Open format?No
Free format?No

RealMedia is a proprietary multimedia container format created by RealNetworks with the filename extension .rm. RealMedia is generally used in conjunction with RealVideo and RealAudio, while also being used for streaming content over the Internet. Typically these streams are in CBR (constant bitrate), but a container for VBR (variable bitrate) streams named RMVB (RealMedia variable bitrate) has been developed.


A RealMedia file consists of a series of chunks that can be of several different types:

Supported audio formats

Supported video formats

See also


  1. ^ "System-Declared Uniform Type Identifiers". Uniform Type Identifiers Reference. Apple Inc.