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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-measurement issues become important.
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.
A YouTube video statistics with VP9 video codec and Opus audio codec. A main user of VP9 is Google's popular video platform YouTube, which offers VP9 video at all resolutions [52] along with Opus audio in the WebM file format, through DASH streaming.
YouTube shows video statistics with the AV1 video codec and Opus audio codec. In 2018, YouTube began deploying AV1, starting with its AV1 Beta Launch Playlist. According to the description, the videos are (to begin with) encoded at high bitrate to test decoding performance, and YouTube has "ambitious goals" for rolling out AV1.
VideoLAN dav1d – An AV1 decoder for decoding videos with AV1 codec; Xiph.Org rav1e – An AV1 encoder written in Rust; Google libgav1 – An AV1 decoder by Google; xvc – An open source video codec, aiming to compete with h.265 and AV1. The reference implementation is released under the LGPL 2.1 and currently available in version 2.0 (as of ...
A video coding format [a] (or sometimes video compression format) is a content representation format of digital video content, such as in a data file or bitstream. It typically uses a standardized video compression algorithm, most commonly based on discrete cosine transform (DCT) coding and motion compensation .
Comparison of video codecs; List of open-source codecs. x265 – an open-source software implementation of HEVC; List of multimedia (audio/video) codecs. H.264/MPEG-4 AVC – the video standard predecessor of HEVC; AV1 – an open format developed by the Alliance for Open Media as a successor to VP9 and a competitor to HEVC
Blackbird FORscene video codec; Firebird [62] Original FORscene video codec; Digital Video Interactive standards: RTV 2.1 (a.k.a. Indeo 2) FFmpeg (decoder only) PLV (Production Level Video) ActionMedia II driver (decoder only) Indeo 3 [63] /4/5 [64] FFmpeg (decoder only) Microsoft Video 1 (MSV1, MS-CRAM, based on MotiVE) FFmpeg (decoder only)