Owner: OpenDivXThis FOURCC code is used for versions 4.0 and later of the DivX codec. DivX, "the MP3 of video," is the popular and market-leading MPEG-4 video codec that is emerging as the standard for full screen, full motion, DVD-quality video over IP-based networks.
Apparently version 5 also encodes using FOURCC DX50.
The Microsoft codec pack available here apparently supports Divx 6.
This FOURCC is supported by LEAD's MCMP Codec.