High Quality Content by WIKIPEDIA articles! 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 firmware more versatile as well, so that the proper playback of compact DVDs is often supported, but rarely documented (especially in North America and Europe).

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