- 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.
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