RealVideo 4
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- FourCC: rv40
- Company: Real
- High level whitepaper: https://datatype.helixcommunity.org/2003/codecdocs/rv9_tech_overview_v1_5.pdf
- Samples: http://samples.mplayerhq.hu/real/VC-RV40/
RealVideo 4 is available in RealPlayer starting with version 9. RealVideo 10 (introduced with RealPlayer 10) uses the same RV40 video format, and can be played by RealPlayer 9 decoder. All Realvideo 10 enhancements are in the encoder.
RV40 is suspected to be based on H.264.
Technical Details
The following block diagram is lifted wholesale from the above whitepaper and gives a general overview of the general decoding flow for a RealVideo 4 data stream.