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The quality the codec can achieve is heavily based on the compression format the codec uses. A codec is not a format, and there may be multiple codecs that implement the same compression specification – for example, MPEG-1 codecs typically do not achieve quality/size ratio comparable to codecs that implement the more modern H.264 specification.
High Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard designed as part of the MPEG-H project as a successor to the widely used Advanced Video Coding (AVC, H.264, or MPEG-4 Part 10).
MPEG-4 AVC (H.264) Lossy or lossless: 2004-08 Patent encumbered [57] Yes Yes Yes Yes Yes [III] Yes Yes [58] Yes AV1: Lossy or lossless: 2018-03 Patent claims Beta [59] Yes No No No No Planned No VP9: Lossy or lossless: 2013-06 Patent claims Yes Yes No Yes Yes No No No VP8: Lossy or lossless: 2008-09 Patent claims Yes Yes No Yes Yes No No No ...
The H.264 video format has a very broad application range that covers all forms of digital compressed video from low bit-rate Internet streaming applications to HDTV broadcast and Digital Cinema applications with nearly lossless coding. With the use of H.264, bit rate savings of 50% or more compared to MPEG-2 Part 2 are reported.
H.264 lossless x264 (encoder only) FFmpeg (decoder only, uses x264 for encoding) H.265 lossless [39] x265 (encoder only) UHDcode (decoder only, uses x265 to read HEVC encoded files) [40] FFmpeg (decoder only, uses x265 for encoding) [41] [42] Motion JPEG 2000 lossless libopenjpeg; JPEG XS lossless FastTICO-XS; IETF standards:
x264 – H.264/MPEG-4 AVC implementation. x264 is not a codec (encoder/decoder); it is just an encoder (it cannot decode video). OpenH264 – H.264 baseline profile encoding and decoding; OpenVVC [1] an VVC /H.266 Real Time-Decoder for Mac OS, Windows, Linux and Android and special Version of FFmpeg, [2] which was used for Ateme Satellite ...
Context-adaptive binary arithmetic coding (CABAC) is a form of entropy encoding used in the H.264/MPEG-4 AVC [1] [2] and High Efficiency Video Coding (HEVC) standards. It is a lossless compression technique, although the video coding standards in which it is used are typically for lossy compression applications.
Some video coding formats designed explicitly for either lossy or lossless compression, and some video coding formats such as Dirac and H.264 support both. [ 49 ] Uncompressed video formats, such as Clean HDMI , is a form of lossless video used in some circumstances such as when sending video to a display over a HDMI connection.
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