For offline storage and viewing, it is typically preferable to encode at constant quality (usually defined by quantization) rather than using bit rate control. Software characteristics Codecs list The Xiph.Org Foundation has negotiated an irrevocable free license to Theora and other VP3-derived codecs for everyone, for any purpose. DivX Plus is also known as DivX 8. The latest stable version for Mac is DivX 7 for Mac. Native operating system support Note that operating system support does not mean whether video encoded with the codec can be played back on the particular operating system for example, video encoded with the DivX codec is playable on Unix-like systems using free MPEG-4 ASP decoders (FFmpeg MPEG-4 or Xvid), but the DivX codec (which is a software product) is only available for Windows and macOS. Technical details Theora streams with different frame rates can be chained in the same file, but each stream has a fixed frame rate. Freely available codecs comparisons List of freely available comparisons and their content description: See also Comparison of video player software List of codecs List of open-source codecs Structural similarity MOVIE Index Comparison of audio coding formats Comparison of video container formats Comparison of video editing software Notes and references External links Laboratory for Image and Video Engineering (LIVE) MSU Subjective Comparison of Modern Video Codecs Video Codecs Video codecs