Dirac, also possibly referred to by the name of the standard SMPTE 2042-1-2009 or by the name of an implementation Schrödinger, is a lossy video codec developed in 2008 of roughly the same generation as H.264, VC-1, and VP8. A subset consisting only of I-frames is called Dirac Pro, VC-2, or SMPTE 2042-2-2009.
- The reference implementation, known as "dirac-research" or simply "Dirac"
- Schrödinger, for example version 1.0.11 being at 
- Dirac's official website website
- MultimediaWiki page
- BBC page for Dirac
- BBC page for Dirac Pro
- Wikipedia page