Jump to content

RealMedia: Difference between revisions

From Wikipedia, the free encyclopedia
Content deleted Content added
No edit summary
→‎Overview: wikilinks
Line 31: Line 31:
=== Supported audio formats ===
=== Supported audio formats ===


* RealAudio 1.0 (VSELP), {{Not a typo|IpcJ}}
* RealAudio 1.0 (VSELP), {{Not a typo|IpcJ}}
* RealAudio 2.0 (LD-CELP), 28_8
* RealAudio 2.0 (LD-CELP), 28_8
* AC3, {{Not a typo|dnet}}
* AC3, {{Not a typo|dnet}}
* {{Not a typo|Sipro, sipr}}
* {{Not a typo|sipr}}
* Cook, cook
* , cook
* ATRAC3, {{Not a typo|atrc}}
* ATRAC3, {{Not a typo|atrc}}
* RealAudio Lossless Format, {{Not a typo|ralf}}
* RealAudio Lossless Format, {{Not a typo|ralf}}
* LC-AAC, {{Not a typo|raac}}
* LC-AAC, {{Not a typo|raac}}
* HE-AAC, {{Not a typo|racp}}
* HE-AAC, {{Not a typo|racp}}


=== Supported video formats ===
=== Supported video formats ===
* ClearVideo (from helix spec)
* ClearVideo (from helix spec)
* H.263, RV10
* H.263, RV10
* H.263, RV13
* H.263, RV13
* H.263+, RV20
* H.263+, RV20
* H.264 precursor, RV30
* H.264 precursor, RV30
* H.264 precursor, RV40
* H.264 precursor, RV40
* H.263+ (RV20), RVTR
* H.263+ (RV20), RVTR

Revision as of 10:04, 20 March 2024

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

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.

Overview

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

Supported video formats

See also

References

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