What is AV1?
AV1 is a modern open-source video codec by the Alliance for Open Media that delivers superior compression vs H.264 and H.265, ideal for streaming.
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What is AV1?
AV1 (AOMedia Video 1) is a royalty-free, open-source video coding format developed by the Alliance for Open Media (AOM). It was designed to succeed VP9 and compete with H.265/HEVC while remaining completely free to use.
AV1 provides approximately 30% better compression than H.265 at the same quality level. It is widely supported in modern browsers and streaming platforms including YouTube and Netflix.
How AV1 Works
AV1 is a block-based hybrid video codec that partitions frames into superblocks and recursively subdivides them, applying intra and inter prediction, transform coding, and entropy coding to the residuals.[1] It introduced or refined tools such as large numbers of directional intra-prediction modes, compound prediction, warped motion, and in-loop filters including the constrained directional enhancement filter and loop restoration.[2]
History and Standardization
The Alliance for Open Media was formed in 2015 by companies including Google, Mozilla, Microsoft, Amazon, Netflix, and Intel, and the AV1 bitstream specification was finalized in 2018, drawing on Google's VP9, Mozilla's Daala, and Cisco's Thor projects.[3] The format was designed to be royalty-free, a key motivation given the licensing complexity surrounding H.265/HEVC.[5]
Technical Trade-offs
AV1's compression gains come at the cost of high encoding complexity, and early software encoders were far slower than HEVC encoders, prompting development of optimized encoders such as SVT-AV1 and rav1e and dedicated hardware encode/decode support.[4] AV1 is typically carried in containers such as MP4 or WebM and supports high dynamic range, wide color gamut, and resolutions up to and beyond 8K.[4]
Technical Specifications
AV1 vs Other Video Codecs
| Feature | AV1 | H.264 | H.265 | VP9 |
|---|---|---|---|---|
| Type | Codec[3] | Codec | Codec | Codec |
| Compression efficiency | Very high[5] | Moderate | High | High |
| Standardized by | Alliance for Open Media[3] | ITU-T / ISO | ITU-T / ISO | |
| License | Royalty-free[3] | Patent-licensed | Patent-licensed | Royalty-free |
| Device/browser support | Growing, some hardware[5] | Universal | Wide, hardware | Browsers, YouTube |
| Best for | Efficient streaming | Compatibility | 4K efficiency | Web streaming |
AV1 delivers strong royalty-free compression but encoding is slow and hardware decode is still rolling out.
Pros & Cons of AV1
Advantages
30% better than H.265 at the same quality - smaller files, lower bandwidth.
No licensing fees, unlike H.265 which requires patent royalties.
Supported in Chrome, Firefox, Edge, and Safari 16+.
Modern GPUs and mobile chips include dedicated AV1 decoders.
Disadvantages
AV1 encoding is computationally intensive without dedicated hardware.
Hardware AV1 encoding only available on newer GPUs (NVIDIA RTX 4000+, Intel Arc).
Older devices and software may not support AV1 playback.
When to Use AV1
Use AV1 when bandwidth efficiency and royalty-free licensing are priorities.
Video Streaming
YouTube and Netflix use AV1 to reduce bandwidth while maintaining 4K quality.
Web Video
Websites serve AV1 via WebM without paying licensing fees.
Video Conferencing
Apps like Google Meet use AV1 for high-quality calls at lower bitrates.
Game Streaming
Screen recording and game streaming use AV1 for smaller high-quality files.
Need to Work with AV1 Files?
Use our free online converter to convert or compress AV1 files - no software needed.
Try Video Converter FreeFrequently Asked Questions
What browsers support AV1?
Chrome, Firefox, Edge, and Safari 16+ support AV1 playback natively.
Is AV1 better than H.265?
AV1 achieves 20-30% better compression than H.265 at equivalent quality and is royalty-free. However H.265 encoding is currently faster.
Can I play AV1 on my phone?
Modern Android and iOS devices support AV1 playback, especially with dedicated hardware decoders.
What container format does AV1 use?
AV1 is commonly packaged in WebM or MKV containers, and can also use MP4.
Why is AV1 encoding slow?
AV1 uses complex algorithms for compression efficiency. Hardware encoders like NVIDIA RTX 4000 series make AV1 encoding much faster.