[PrayeR]

вот на размышление

Xvid.org
"· Can I encode some videos in Microsoft's MPEG-4 V1/V2 format and then watch them with XviD or vice-versa?


No, you can't. Despite the name, MS MPEG-4 is not truly standard compliant MPEG-4 - rather it's Microsoft's own proprietary randition of MPEG-4 technology and is incompatible with the international MPEG-4 standard as specified by ISO. So unfortunately, XviD and MS MPEG-4 cannot interoperate."

"DivX is proprietary software, with an opaque development cycle that follows only a commercial logic. XviD is Free Software (licensed under the GNU GPL), open to third-party contributions and aims for standard's compliance, portability and interoperability, high processing speed and superior quality."