RealMedia
RealMedia is a proprietary multimedia container format created by RealNetworks. Its extension is ".rm". It is typically used in conjunction with RealVideo and RealAudio and is 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.
Filename extension |
.rm |
---|---|
Developed by | RealNetworks |
Type of format | multimedia container format |
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), IpcJ
- RealAudio 2.0 (LD-CELP), 28_8
- AC3, dnet
- Sipro, sipr
- Cook, cook
- ATRAC3, atrc
- RealAudio Lossless Format, ralf
- LC-AAC, raac
- HE-AAC, racp
Supported video formats
- ClearVideo (from helix spec)
- H.263, RV10
- H.263, RV13
- H.263+, RV20
- H.264 precursor, RV30
- H.264 precursor, RV40
- H.263+ (RV20), RVTR
gollark: Although of course few "immutable" things can stand up to `memmove(id(7), id(8), sys.getsizeof(7))`.
gollark: Uncool.
gollark: How immutable is it? Can you mutate items in it, thus creating apiohazardous conditions?
gollark: I can only be amazed by things with an amazingness quotient above or equal to 0.33338.
gollark: Depends what.
See also
- RealPlayer
- Container format
- Comparison of container formats
- Comparison of video player software
- RealVideo codecs
- RealAudio codecs
- Helix Community - the free and open source software project from RealNetworks
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