What is AV1?
AV1 is an open video codec designed by the Alliance for Open Media for efficient internet video delivery under its royalty-free patent licensing program. It can reduce bitrate at comparable visual quality, although encoding commonly requires more work than older codecs.
How AV1 works
AV1 compresses video with spatial and temporal prediction, transform coding, entropy coding, and an in-loop filtering toolset defined by an open bitstream specification. It succeeds VP9 in web-oriented delivery but is a codec rather than a container, so streams still need packaging such as WebM or ISO base media. Encoding complexity is a major operational tradeoff, while hardware decoding broadens practical playback. Pipelines commonly add AV1 as a rendition beside an older fallback.
Key facts
- AV1 is developed through the Alliance for Open Media and uses a royalty-free licensing model intended to support implementation in browsers, devices, and open-source software.
- An AV1 elementary stream does not carry a complete web presentation by itself; container, audio codec, captions, and streaming manifest compatibility must be evaluated together.
- Its richer coding tools can improve compression efficiency, but software encoding is often computationally expensive, making throughput and hardware acceleration key buying criteria.
When AV1 matters
Select AV1 when bandwidth savings outweigh added encoding time and the target playback environment supports it. Provide another codec when older devices or software cannot decode AV1 reliably.