cDVD discs, sometimes called mini-DVD discs as well, are regular CDs that contain MPEG-video structured in accordance with the DVD-Video specifications (namely, a VIDEO_TS directory containing properly-authored IFO/BUP and VOB files). Such discs must be written in the so-called "Mode 1", which is compatible with both the ISO-9660 and UDF 1.02 filesystems, and therefore limits the amount of data that can be stored on an 80-minute CD to 700 MiB. By using non-standard resolutions, long GOPs, more B-frames, and high-compression quantization matrices, it's possible to store up to 2 hours of video with audio and subtitles on a regular 80-minute CD. Until 2003, few standalone DVD-players had drives capable of spinning a CD at the 8X rate needed to keep up with the maximum data stream allowed by the DVD-Video specifications, but today, many models contain drives
similar to those used on desktop computers, and more versatile firmwares as well, so that the proper playback of compact DVDs is often supported, but rarely documented (especially in North America and Europe).

See also

• Video CD
  Video CD
  Before the advent of DVD and Blu-ray, the Video CD became the first format for distributing films on standard 120 mm optical discs. The format is a standard digital format for storing video on a Compact Disc...
  
   (VCD)
• CD Video
  CD Video
  CD Video was a format introduced in 1987 that combined the technologies of compact disc and laserdisc. CD-V discs were the same size as a standard 12 cm audio CD, and contained up to 20 minutes worth of audio information that could be played on any audio CD player...
  
  
• SVCD
• BD9 & BD5 - Blu-ray format video on DVDs
• MiniDVD
  MiniDVD
  MiniDVD is a DVD disc having 8 cm in diameter.The 8 cm optical disc format was originally used for music CD singles, hence the commonly used names CD single and miniCD...
  
  - 8 cm DVDs