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The above-mentioned aspects include features in all profiles of H.264. A profile for a codec is a set of features of that codec identified to meet a certain set of specifications of intended applications. This means that many of the features listed are not supported in some profiles. Various profiles of H.264/AVC are discussed in next section.
Many of the codecs listed implement media formats that are restricted by patents and are hence not open formats. For example, x264 is a widely used open source implementation of the heavily patent encumbered MPEG-4 AVC video compression standard.
AOMedia Video 1 (AV1) is an open, royalty-free video coding format initially designed for video transmissions over the Internet. It was developed as a successor to VP9 by the Alliance for Open Media (AOMedia), [2] a consortium founded in 2015 that includes semiconductor firms, video on demand providers, video content producers, software development companies and web browser vendors.
Integrated Multi Format Codec (MFC) provides encoding and decoding of MPEG-4/H.263/H.264 up to 1080p@30fps and decoding of MPEG-2/VC1/MPEG-4 video up to 1080p@30fps. Alma Technologies provides ultra low latency H.264 Encoder IP cores since 2011 capable of encoding Full HD video even on low cost FPGA devices. Standalone hardware implementations ...
RealVideo Fractal Codec (a.k.a. Iterated Systems ClearVideo) FFmpeg (decoder only) RealMedia HD (a.k.a. RealVideo 11 or RV60) RealMedia HD SDK; FFmpeg (decoder only) Snow Wavelet Codec; Sorenson Video, [65] Sorenson Spark. FFmpeg; VP9 by Google; VP10 was not released and instead was integrated into AV1 libvpx; FFmpeg; Windows Media Video (WMV)
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.
libvpx originates from the video codec company On2 Technologies that sold its first software codec in mid-90s. libvpx was released as free software by Google on May 19, 2010, after the acquisition of On2 Technologies for an estimate of over 120 million US dollars.
Royalties on codecs [L] Yes Yes Yes Yes [19] Yes Yes Audio Video Interleave (AVI) .avi Microsoft: 1992-11 Proprietary [20] Yes [M] Yes [N] Yes No Yes Needs alterations Material Exchange Format (MXF) .mxf SMPTE: 2004-09 Patent-free [21] Yes Yes No Yes [21] Yes No MPEG program stream (PS) .m2p, .ps [O] MPEG: 1993-08 Patent-free [22] Yes Yes [P ...