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RealMedia

From Wikipedia, the free encyclopedia

RealMedia is a proprietary multimedia container format created by RealNetworks with the filename extension .rm. RealMedia is

RealMedia
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

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.

RealMedia
Filename extension
.rm, .rma, .rmi, .rmv, .rmvb, .rmhd, .rmm, .ra, .ram
Internet media typeapplication/vnd.rn-realmedia
Type code 

RealMedia Filename extension .rm, .rma, .rmi, .rmv, .rmvb, .rmhd, .rmm, .ra, .ram

Internet media type application/vnd.rn-realmedia Uniform Type Identifier (UTI) com.real.realmedia Developed by RealNetworks Type of format Container format Open format? No

Free format? No
Uniform Type Identifier (UTI)com.real.realmedia[2]
Developed byRealNetworks
Type of formatContainer format
Open format?No
Free format?No

Overview

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

  • .RMF: RealMedia file header
  • PROP: File properties header
  • MDPR: Media properties header
  • CONT: Content description header
  • DATA: Data header
  • INDX: Index header

Supported audio formats

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Supported video formats

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See also

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References

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










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