18. This was the last one of the listed rulesets covering pornography. The once generally accepted TDX2002 ruleset requires movie releases to contain a DivX 3.11 or Xvid encoded video stream with an MP3 or AC3 encoded audio stream in an AVI container file. Movies are released in one, two or more 700 MiB files, so that they can be easily stored on CD-R. Two or four TV show episodes usually share one CD, hence 175 or 350 MiB releases are common. 233 MiB (three episodes per CD) are more rare but not forbidden, and are often used for full 30-minute programs with no adverts. 233 MiB is more used on whole season rips from retail sources or on single episodes that have a longer runtime. In July 2002, around the release of the new TDX2K2 ruleset, Xvid releases started to pop up. DivX with SBC was retired. VCDVaULT was the pioneer in promoting Xvid to the scene. In 2003, TheWretched believed it was time to update the standards again and a few tweaks were in order. Thereafter they found the lack of info groups put into the NFO inexcusable: It isn't only about the flashy ASCII art, the content matters. The TDX2002 ruleset was followed by TXD2005. Because all DivX codecs are banned in this new ruleset, TDX became TXD: The XviD Releasing Standards. There is a rebuttal against this revision, proving it to be flawed in several aspects. Higher resolutions are not allowed. More efficient formats such as AVC and AAC have not been adopted yet, but are still being pushed by some release groups. There are also considerations to replace the old proprietary AVI file format with a modern container such as MP4 or MKV that can include multiple audio streams, subtitles and DVD-like menus. However, few standalone DVD players support these formats yet, and cross-platform playback is an important consideration. Nonetheless the introduction of MPEG-4 playback capabilities in standalone DVD players was a result of the huge amount of TDX-compliant movie material available on the internet. The latest TXD revision is TXD2009. As with each revision, there are some major changes. Multiple CD releases aren't necessary anymore, but most release groups keep following the tradition. The maximum width of a rip is lowered back to 640px for WS releases, the movie length versus file size rules and many other sections of the ruleset are redefined or