<story><title>AV1 beats x264 and libvpx-vp9 in practical use case</title><url>https://code.facebook.com/posts/253852078523394/av1-beats-x264-and-libvpx-vp9-in-practical-use-case/</url></story><parent_chain></parent_chain><comment><author>vladdanilov</author><text>Meanwhile, there are 2.8 MB of images in the article with the header image alone being a 1.6 MB JPEG (!). They can be reduced by at least 50%, given that the deringing filter works fine on contrast text&amp;#x2F;charts. Even more, the optimal format for this type of images is PNG not JPEG. After the conversion and optimization, they take 889 KB [1], &amp;gt;3 times smaller, and doing the same on properly resized originals without JPEG artifacts can bring them down to 100-200 KB.&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;github.com&amp;#x2F;vmdanilov&amp;#x2F;optimage&amp;#x2F;files&amp;#x2F;1898955&amp;#x2F;images.zip&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;github.com&amp;#x2F;vmdanilov&amp;#x2F;optimage&amp;#x2F;files&amp;#x2F;1898955&amp;#x2F;images.z...&lt;/a&gt;</text></comment>
<story><title>AV1 beats x264 and libvpx-vp9 in practical use case</title><url>https://code.facebook.com/posts/253852078523394/av1-beats-x264-and-libvpx-vp9-in-practical-use-case/</url></story><parent_chain></parent_chain><comment><author>keldaris</author><text>&amp;quot;Our testing shows AV1 surpasses its stated goal of 30% better compression than VP9, and achieves gains of 50.3%, 46.2% and 34.0%, compared to x264 main profile, x264 high profile and libvpx-vp9, respectively.&lt;p&gt;This sounds like AV1 is actually worse than H.265, at least at low-ish resolutions. Am I misreading these results?&lt;p&gt;For context, I&amp;#x27;ve moved to using H.265 (via the x265 encoder) for archiving 720p and 1080p video. At least for low bitrates (in the 500-1500 kbit&amp;#x2F;s range) it gives me over 50% smaller filesizes compared to x264 high profile at roughly the same quality. The encoding speed is much slower, of course, but not by more than 10x on modern CPUs, typically less. I had hoped to move over to some AV1 implementation in a few years, but these results make that look doubtful. Are the supposed advantages of AV1 over H.265 confined to ultra high resolutions and&amp;#x2F;or high bitrates?&lt;p&gt;Please note that this is a purely technical question. I don&amp;#x27;t care about the patent issues and for those that do, they&amp;#x27;ve been covered at length in other comments already.</text></comment>