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Grois and his group compared the quality of HEVC, x264, and VP9, and found that, “according to the experimental results, the coding efficiency of VP9 was shown to be inferior to both H.264/MPEG - AVC and H.265/ MPEG - HEVC with an average bitrate overhead at the same objective quality of 8.4 percent and 79.4 percent, respectively.”Īnother study produced by Maxim P. One study, headlined by Dan Grois, a senior member of the IEEE, was presented at the 30th Picture Coding Symposium in December 2013. So, I checked for objective third-party comparisons and found several, all of which find that HEVC offers superior quality to VP9, though by varying degrees. I could use FFMPEG, but command lines aren’t my thing, particularly when attempting to produce files for quality comparisons. So if you’re a content producer, your next two questions are likely “how does the quality compare?” and “where will the two codecs play?” Even though I’ve tested multiple HEVC codecs, none of the encoders that I typically work with support the VP9 codec. For content producers, however, there will never be content-related royalties, even for video distributed via pay-per-view or subscription. The maximum yearly charge is $25 million, a substantial boost from H.264’s $6.5 million. In case you hadn’t heard, MPEG LA has announced its proposed royalties for HEVC, which includes a $0.20/unit charge on encoders and decoders, with the first 100,000 units excepted. I wanted to take this opportunity to update the status of HEVC and VP9 and introduce you to Daala.īy way of background, HEVC/H.265 is the royalty-encumbered, standards-based successor to H.264, while VP9 is the free, open-source codec from Google. Over the past few months, a new UHD codec called Daala has also come to the fore. We have replaced it with a different headline.There’s a lot of interest in ultra-high definition (UHD) video, and the two codecs that drive it, HEVC and VP9. Update, 8/30/16, 2:17pm PT: It's come to our attention that the original headline in this article was poorly worded to the point of being misleading. Google, as well as Mozilla, Cisco, Intel, Microsoft, and even Netflix itself are all contributing designs, code, and patents to create a new standard royalty-free codec that everyone can use. However, by the time either VP9 or HEVC become too ubiquitous, a new generation of royalty-free video codecs that are being standardized by the IETF may arrive to replace both. This has changed somewhat with VP9, as more and more chips come out with accelerated decoding, and even encoding, for VP9. VP9’s predecessor, the VP8 codec, failed to gain traction because it arrived much later than h.264, and because chip makers weren’t too interested in utilizing hardware accelerators for it. Google is currently using it for YouTube, where all videos are encoded in VP9. The fact that VP9 performs better at 1080p or higher is not a major surprise, considering VP9 was optimized for resolutions beyond HD. However, at the 1080p resolution, the difference was either much smaller (in HEVC’s favor), or, in some cases, VP9 even beat HEVC in bitrate savings.
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HEVC’s x265 implementation outperformed VP9’s libvpx for most resolutions and quality metrics. The company learned that previous research showing up to 50% bitrate savings for both HEVC and VP9 compared to h.264 turned out to be true.