Difference between revisions of "RealMedia"

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(Add to container formats category.)
(outline basic RM chunk format and types)
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There are two different versions, the old RA files are just for audio.
There are two different versions, the old RA files are just for audio.
== RA Format ==
== Real Format ==
All multi-byte numbers are stored in big endian format.
A RealMedia file consists of a series of chunks. Each chunk has the following format:
bytes 0-3    chunk type ([[FOURCC]])
bytes 4-7    chunk size, including 8-byte preamble
bytes n..    chunk payload
Real chunk types:
* .RMF: RealMedia file header
* PROP: File properties
* MDPR: Stream properties
* CONT: Content description/metadata
* DATA: File data
* INDX: File index
* '.','r','a',0xFD: Legacy RealAudio encapsulation
* VIDO


[[Category: Container Formats]]
[[Category: Container Formats]]

Revision as of 23:49, 4 February 2006

  • Extensions: rm, ra
  • Company: Real

Multimedia container format developed by Real and used almost exclusively for codecs developed by Real.

There are two different versions, the old RA files are just for audio.

RA Format

Real Format

All multi-byte numbers are stored in big endian format.

A RealMedia file consists of a series of chunks. Each chunk has the following format:

bytes 0-3    chunk type (FOURCC)
bytes 4-7    chunk size, including 8-byte preamble
bytes n..    chunk payload

Real chunk types:

  • .RMF: RealMedia file header
  • PROP: File properties
  • MDPR: Stream properties
  • CONT: Content description/metadata
  • DATA: File data
  • INDX: File index
  • '.','r','a',0xFD: Legacy RealAudio encapsulation
  • VIDO