H.264 vs AV1: Codec Comparison for Streaming and Video

H.264 (AVC) is the most widely used video codec in the world, supported by every browser, phone, and streaming platform. AV1 is a newer royalty-free codec developed by the Alliance for Open Media that achieves roughly 50% better compression at the same visual quality. H.264 encodes fast and plays everywhere. AV1 produces smaller files but takes significantly longer to encode.

Compression Efficiency

AV1 consistently outperforms H.264 in compression tests. At 1080p, AV1 typically needs about 33% less bitrate to match H.264 quality. At 4K and 8K resolutions, the gap widens further, with AV1 requiring up to 50-80% less bandwidth. This makes AV1 particularly valuable for streaming services trying to reduce CDN costs and for users on limited bandwidth connections.

Encoding Speed

H.264 encoding is fast. Real-time encoding on consumer hardware has been standard for over a decade. AV1 encoding is dramatically slower, often 10-100x longer than H.264 for software encoders. Hardware AV1 encoding (available on newer Intel, AMD, and NVIDIA GPUs since 2022-2023) narrows this gap significantly, but still lags behind H.264 hardware encoding speed. For live streaming, H.264 remains the practical choice for most setups.

Device and Browser Support

H.264 is universally supported. Every modern device, browser, and media player handles it. AV1 decoding support has improved substantially: Chrome, Firefox, Edge, and Safari all support it. Most phones from 2023 onward include AV1 hardware decoding. However, older hardware (pre-2020 phones, older smart TVs, dedicated media players) often cannot decode AV1 at all, making H.264 the safer bet for broad audiences.

Licensing

H.264 requires licensing fees through the MPEG-LA patent pool. Large streaming platforms and hardware manufacturers pay these royalties, which adds to the cost of H.264-based products. AV1 is completely royalty-free. Any company or individual can encode, decode, and distribute AV1 content without paying patent licenses. This is a major reason why YouTube, Netflix, and other major platforms are adopting AV1.

When to Use Each

Use H.264 when you need maximum compatibility, real-time encoding, or support on older devices. Use AV1 when file size and bandwidth savings matter more than encoding speed, or when targeting modern browsers and devices. Many platforms now encode in both: H.264 as a fallback and AV1 for clients that support it.

Need to convert or compress your videos? Try our video compressor or Video to MP4 converter. For related codec comparisons, see H.264 vs H.265, AV1 vs H.265, and H.264 vs VP9.