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 is 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