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x264 is a free and open-source software library and a command-line utility developed by VideoLAN for encoding video streams into the H.264/MPEG-4 AVC video coding format. [2] It is released under the terms of the GNU General Public License .
Download QR code; Print/export ... Please read the length guidelines and help move details into the article's body. ... x264 Main-Concept
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 ...
FFmpeg can also optionally (set at build time) link to the x264 library to encode H.264. CoreAVC by CoreCodec is a highly optimized commercial H.264 decoder. According to independent tests by people on the Doom9.org forums, it is the fastest software decoder as of June 2006. The standard version supports Baseline Profile, Main Profile and High ...
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.
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.
Nvidia NVENC (short for Nvidia Encoder) [1] is a feature in Nvidia graphics cards that performs video encoding, offloading this compute-intensive task from the CPU to a dedicated part of the GPU.
It is used to optimize residual DCT coefficients after motion estimation in lossy video compression encoders such as Xvid and x264. Trellis quantization reduces the size of some DCT coefficients while recovering others to take their place. This process can increase quality because coefficients chosen by Trellis have the lowest rate-distortion ...