{"id":921,"date":"2026-04-14T10:20:20","date_gmt":"2026-04-14T03:20:20","guid":{"rendered":"https:\/\/liveapi.com\/blog\/vp9-codec\/"},"modified":"2026-04-14T16:23:54","modified_gmt":"2026-04-14T09:23:54","slug":"vp9-codec","status":"publish","type":"post","link":"https:\/\/liveapi.com\/blog\/vp9-codec\/","title":{"rendered":"VP9 Codec: What It Is, How It Works, and When to Use It"},"content":{"rendered":"Reading Time: <\/span> 12<\/span> minutes<\/span><\/span>

YouTube delivers more than 500 hours of video every minute. A large share of that traffic runs on VP9 \u2014 Google’s open-source codec that cuts bandwidth by up to 43% compared to H.264 at the same perceptual quality.<\/p>\n

If you’re building a streaming app, OTT platform, or any product that delivers video at scale, understanding the VP9 codec matters. It affects your storage costs, your CDN bills, your viewer experience, and which devices your content reaches.<\/p>\n

This guide covers what VP9 is, how it encodes video, how it compares to H.264, H.265, and AV1, and when it makes sense to use it in your stack.<\/p>\n

What Is the VP9 Codec?<\/h2>\n

The VP9 codec is a royalty-free, open-source video compression format developed by Google. Released in 2013, it was designed as a direct alternative to H.265 (HEVC) \u2014 delivering comparable compression efficiency without licensing fees.<\/p>\n

A video codec<\/a> is a standard that defines how raw video data is encoded into a compressed bitstream for storage or transmission, and then decoded back into frames for playback. VP9 is Google’s ninth generation in the VP codec family, building on the VP8 codec it open-sourced in 2010.<\/p>\n

VP9 is a codec, not a container format. For web delivery, it’s typically paired with the WebM container format<\/a> (`.webm` file extension), though it also works inside Matroska (`.mkv`) containers and fragmented MP4 for MPEG-DASH streaming.<\/p>\n

In plain terms:<\/strong> VP9 is an open-source video codec that delivers 30\u201350% better compression than H.264 at equivalent quality, making it a cost-effective choice for web video delivery, 4K streaming, and adaptive bitrate pipelines.<\/p>\n

A Brief History of VP9<\/h2>\n

VP9’s origins trace back to Google’s acquisition of On2 Technologies in February 2010 for $124.6 million<\/a>. On2 had developed the VP3 through VP8 codec lineage. After the acquisition, Google open-sourced VP8 and began work on what became VP9.<\/p>\n

Development started in late 2011 under the internal codename “NGOV” (Next Generation Open Video). Google released VP9 publicly on June 17, 2013, with initial support in Chrome 29.<\/p>\n

YouTube adopted VP9 in 2014\u20132015 as its primary codec for 4K content. The scale of that deployment \u2014 billions of VP9 streams per day \u2014 helped establish VP9 as a production-ready standard rather than an experimental format.<\/p>\n

In September 2015, Google co-founded the Alliance for Open Media (AOM) alongside Amazon, Netflix, Microsoft, Mozilla, and others. AOM went on to develop AV1 as VP9’s official successor. VP9 is now in maintenance mode, but it remains widely deployed across YouTube, Netflix, Twitch, and Meta.<\/p>\n

How VP9 Encoding Works<\/h2>\n

VP9 uses a block-based hybrid coding approach \u2014 the same general family as H.264 and H.265 \u2014 but with larger maximum block sizes and more advanced prediction tools.<\/p>\n

Understanding how video encoding<\/a> works at this level helps you make better decisions about encoder settings, quality profiles, and when VP9 is worth the compute cost.<\/p>\n

Superblocks and Block Partitioning<\/h3>\n

VP9 divides each frame into superblocks<\/strong> \u2014 64\u00d764 pixel regions that can be recursively split into smaller blocks down to 4\u00d74 pixels. Larger blocks handle flat, uniform areas efficiently. Smaller blocks handle fine detail and sharp edges. This adaptive partitioning lets the encoder allocate bits where the visual complexity actually is.<\/p>\n

Prediction Modes<\/h3>\n

VP9 reduces redundancy through two types of prediction:<\/p>\n