DVD (also known as "Digital Versatile Disc" or "Digital Video
Disc") is a popular optical disc storage media format. Its main
uses are video and data storage. Most DVDs are of the same
dimensions as compact discs (CDs) but store more than six times
as much data. DVD-Video discs respectively refer to properly
formatted and structured video content. It uses MPEG-2 for video
compression, with AC-3, MPEG audio for multi-channel audio
support. To decode DVD, you will need both GPL MPEG-2 Decoder,
and AC-3 XviD is the name of a popular new video codec being
developed as an open source project by volunteer programmers
from all over the world. The format was created to offer a free
alternative to other commercial video codecs, and despite being
open source its quality and efficiency has made it one of the
most popular video codecs online. XviD, as a file type, is an
AVI file with video encoded with XviD codec. To convert video to
xvid, please make sure the xvid codec is installed. River Past
Video Cleaner