{"id":826,"date":"2026-03-30T09:55:15","date_gmt":"2026-03-30T02:55:15","guid":{"rendered":"https:\/\/liveapi.com\/blog\/av1-vs-h264\/"},"modified":"2026-03-30T09:55:55","modified_gmt":"2026-03-30T02:55:55","slug":"av1-vs-h264","status":"publish","type":"post","link":"https:\/\/liveapi.com\/blog\/av1-vs-h264\/","title":{"rendered":"AV1 vs H.264: Codec Comparison for Video Streaming"},"content":{"rendered":"Reading Time: <\/span> 12<\/span> minutes<\/span><\/span>

If you’re building a video streaming application, the codec you choose has a direct impact on bandwidth costs, playback quality, device compatibility, and encoding infrastructure. AV1 vs H.264 is one of the most important codec decisions facing developers today \u2014 and the answer isn’t always obvious.<\/p>\n

H.264 has been the default for video delivery since 2003. AV1, released in 2018, promises 30\u201350% better compression at the same quality level \u2014 but comes with real tradeoffs in encoding complexity and hardware support that matter a lot for live streaming and real-time applications.<\/p>\n

This guide breaks down exactly how AV1 and H.264<\/a> compare across compression efficiency, encoding speed, hardware support, browser compatibility, licensing, and streaming use cases \u2014 so you can make the right call for your app.<\/p>\n

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What Are AV1 and H.264?<\/h2>\n

Before comparing them head-to-head, it’s worth understanding what each codec is and where it came from. A video codec<\/a> is a compression algorithm that encodes raw video frames into a compact bitstream for storage or transmission, and decodes that bitstream back to frames for playback.<\/p>\n

H.264 (AVC): The Established Standard<\/h3>\n

H.264 \u2014 officially called Advanced Video Coding (AVC)<\/strong> \u2014 is a video compression standard jointly developed by the ITU-T Video Coding Experts Group and the ISO\/IEC Moving Picture Experts Group. It was finalized in 2003 and has since become the most widely deployed video encoding<\/a> format in history.<\/p>\n

H.264 is supported on essentially every device made in the last 15 years: smartphones, smart TVs, browsers, streaming sticks, game consoles, and professional broadcast hardware. Hardware encoders and decoders for H.264 are built into virtually every modern chip.<\/p>\n

The codec works by dividing frames into macroblocks (16\u00d716 pixel blocks) and encoding differences between frames using motion compensation and discrete cosine transform (DCT). It supports profiles from Baseline (low-power mobile) to High (high-quality streaming) and resolutions up to 8K \u2014 though in practice it’s most commonly used at 1080p and below.<\/p>\n

AV1: The Open-Source Challenger<\/h3>\n

AV1 is an open, royalty-free video codec developed by the Alliance for Open Media<\/a> (AOM) \u2014 a coalition including Google, Apple, Netflix, Meta, Amazon, Microsoft, and Mozilla. It was publicly released in 2018 as a successor to VP9, designed specifically to address the licensing costs and compression limitations of H.264 and H.265.<\/p>\n

AV1 uses larger, more flexible coding units (up to 128\u00d7128 superblocks), an intra-prediction model with 56 directional modes, and advanced entropy coding to achieve significantly better compression than H.264. The tradeoff is that these improvements come with much higher encoding complexity.<\/p>\n

YouTube, Netflix, and Meta now use AV1 for streaming 4K and high-resolution content to compatible devices. According to AOM, AV1 is already reaching billions of device-hours of playback per month.<\/p>\n

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AV1 vs H.264: Head-to-Head Comparison<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Feature<\/th>\nH.264 (AVC)<\/th>\nAV1<\/th>\n<\/tr>\n<\/thead>\n
Release Year<\/td>\n2003<\/td>\n2018<\/td>\n<\/tr>\n
Developer<\/td>\nITU-T \/ ISO\/IEC<\/td>\nAlliance for Open Media<\/td>\n<\/tr>\n
Licensing<\/td>\nPatent-encumbered (MPEG LA pool)<\/td>\nRoyalty-free, open-source<\/td>\n<\/tr>\n
Compression vs H.264<\/td>\nBaseline<\/td>\n~30\u201350% more efficient<\/td>\n<\/tr>\n
Software Encoding Speed<\/td>\nFast<\/td>\n20\u2013100\u00d7 slower (software)<\/td>\n<\/tr>\n
Hardware Encoding<\/td>\nEvery modern chip<\/td>\nRTX 40-series, Intel Arc, RX 7000+<\/td>\n<\/tr>\n
Hardware Decoding<\/td>\nEvery modern chip<\/td>\nMost GPUs post-2020, modern mobile<\/td>\n<\/tr>\n
Browser Support<\/td>\nUniversal<\/td>\nChrome 70+, Firefox 67+, Edge 18+ (not Safari)<\/td>\n<\/tr>\n
Max Resolution<\/td>\nUp to 8K<\/td>\nUp to 8K<\/td>\n<\/tr>\n
Live Streaming<\/td>\nWidely supported<\/td>\nLimited (hardware encoder needed)<\/td>\n<\/tr>\n
Best For<\/td>\nBroad compatibility, live streaming<\/td>\nBandwidth savings, VOD, 4K delivery<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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Compression Efficiency: How Much Smaller Are AV1 Files?<\/h2>\n

Compression efficiency is where AV1’s advantage is clearest. At the same visual quality level (measured by VMAF, SSIM, or PSNR), AV1 produces files that are 30\u201350% smaller than H.264.<\/p>\n

That means a 1-hour stream that costs you 3 GB of bandwidth at H.264 could come in at 1.5\u20132.1 GB with AV1 \u2014 a significant reduction at scale. For a platform delivering millions of video-hours per month, the bandwidth savings can translate directly to lower CDN costs.<\/p>\n

AV1 achieves this through several architectural improvements:<\/p>\n