RealMedia

{{Short description|Digital file format}}

{{More sources needed|date=December 2009}}

{{Infobox file format

| name = RealMedia

| icon =

| extension = .rm, .rma, .rmi, .rmv, .rmvb, .rmhd, .rmm, .ra, .ram

| mime =

| type code =

| uniform type = com.real.realmedia{{cite web |url=https://developer.apple.com/library/archive/documentation/Miscellaneous/Reference/UTIRef/Articles/System-DeclaredUniformTypeIdentifiers.html |title=System-Declared Uniform Type Identifiers |work=Uniform Type Identifiers Reference |publisher=Apple Inc}}

| owner = RealNetworks

| type = Container format

| container for =

| contained by =

| extended from =

| extended to =

| standard =

| free = No

| open = No

}}

RealMedia is a proprietary multimedia container format created by RealNetworks with the filename extension {{Not a typo|.rm}}. RealMedia is 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 =

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

= Supported video formats =

See also

References

{{Reflist}}

{{Compression formats}}

{{DEFAULTSORT:Realmedia}}

Category:Digital container formats

Media

{{Multimedia-software-stub}}