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Xvid (formerly "XviD") is a video codec library following the MPEG-4 video coding standard, specifically MPEG-4 Part 2 Advanced Simple Profile (ASP). It uses ASP features such as b-frames, global and quarter pixel motion compensation, lumi masking, trellis quantization, and H.263, MPEG and custom quantization matrices.
Comparison of video codecs. Α video codec is software or a device that provides encoding and decoding for digital video, and which may or may not include the use of video compression and/or decompression. Most codecs are typically implementations of video coding formats. The compression may employ lossy data compression, so that quality ...
Video codec. A short video explaining the concept of video codecs. A video codec is software or hardware that compresses and decompresses digital video. In the context of video compression, codec is a portmanteau of encoder and decoder, while a device that only compresses is typically called an encoder, and one that only decompresses is a decoder.
Some containers only support a restricted set of video formats: DMF only supports MPEG-4 Visual ASP with DivX profiles. EVO only supports MPEG-4 AVC, MPEG-1 Video, MPEG-2 Video and VC-1. F4V only supports MPEG-4 AVC, MPEG-4 Visual and H.263. FLV only supports MPEG-4 Visual, VP6, Sorenson Spark and Screen Video.
When version 4.0 of DivX was released, the codec went commercial and the need for a free codec, Xvid (then called "XviD", "DivX" backwards), was created. Later, Xvid replaced DivX entirely. Although the DivX codec has evolved from version 4 to 10.6 during this time, it is banned [3] in the warez scene due to its commercial nature.
MPEG-4 Part 2, MPEG-4 Visual (formally ISO / IEC 14496-2 [1]) is a video compression format developed by the Moving Picture Experts Group (MPEG). It belongs to the MPEG-4 ISO/IEC standards. It uses block-wise motion compensation and a discrete cosine transform (DCT), similar to previous standards such as MPEG-1 Part 2 and H.262/MPEG-2 Part 2.
June 8, 1998. (1998-06-08) [2] Discontinued. June 16, 1999. (1999-06-16) [3] DIVX (Digital Video Express) is a discontinued digital video format. Created in part by Circuit City, it was an unsuccessful attempt to create an alternative to video rental in the United States.
x264 contains some psychovisual enhancements which aim to increase the subjective video quality of the encoded video.. Adaptive quantisation in two modes using VAQ.The second mode, a later addition, adapts the strength per frame in an attempt to improve the quality.