Viewing profile — unlord

> People don’t develop video codecs for fun like they do with software. And the reason is that it’s almost impossible to do without support from the industry. As someone who lead a…

Someone asked about benchmarks, so I ran these just now to bring data to the discussion: nathan@arm1:~/git/rav1d.new/target$ hyperfine --warmup 2 "release/dav1d -q -i ~/Chimera-AV1…

It is actually quite a bit more misleading. I was not able to reproduce these numbers on Zen2 hardware, see https://people.videolan.org/~unlord/dav1d_6tap.png . I spoke with the sl…

Encoding speed is not really a concern for web uses, where the image is decoded potentially millions or even billions of times more than it is encoded. I agree, PSNR is a terrible …

> Have you seen this more recent data that includes AVIF? https://cloudinary.com/labs/cid22 The graph from Cloudinary uses libaom to do the encoding at speed preset 7 (aom s7), whi…

> While that most definitely is a consideration, AVIF lacks many features and much of the functionality offered by JPEG XL. What features are these? You have not named a single con…

> Regarding JPEG XL's mobile support, it makes sense it would see limited development if the company that manages one of the biggest mobile players has been the greatest restrictio…

The article claims that "Google wants control, and JPEG XL could take that away from them" however this is disingenuous. The JPEG XL format was co-authored by Google employees, and…

> If you avoid it then you won't be using RISC-V at all, right now. I'm sorry this just isn't true. The K230 has RVV 1.0 hardware and has been available for 5 months. > Which matte…

Note that AVIF is not just AV1 video keyframes. The entire compliment of AV1 video coding tools (including inter prediction with motion vectors) are available. This includes spatia…

Yes, and in fact you can see a demo of dav1d compiled to wasm here: http://jabberfr.org/tmp/ogv.js/ Note this works fine in desktop and mobile Safari.

> But I think it should be noted the HM and VTM are reference encoder and decoder, they are not meant to be used for production nor in any way optimised. Sure, but my comparison wa…

> It really is the state of the art Video Codec, at a decoding complexity that is quite manageable. ( Lower than AV1 ) I am afraid this has not been substantiated by any of the pub…

You may be interested in reading the license page for the royalty-free Opus audio codec: https://opus-codec.org/license/ Full disclosure, I am a member of the Xiph.Org Foundation.

Please see the W3C Patent Policy regarding Web standards. https://www.w3.org/Consortium/Patent-Policy-20040205/ > The goal of this policy is to assure that Recommendations produced…

Yes, there is at least one third party patent license administrator for JPEG-XT: https://www.sisvel.com/licensing-programs/digital-video-disp...

> It’ll be interesting to see if we find out more info and are able to test this encoder in the coming months. You won't have to wait long, more information will be coming out late…

What you are referring to is the encoding time using the libaom reference encoder, which was developed as a research code base to test bitstream features. AV1 (the format) was desi…