rav1e VS ffmpeg-build-script

You can speed up the sampling process with --vmaf n_subsample=5, which in my experience works more accurately than either 2 or 4, possibly due to this bug/feature present in multiple encoders. You might also need to manually set the number of threads used for VMAF calculation with --vmaf n_threads=16, but YMMV.

That remember me of https://github.com/xiph/rav1e which is an AV1 encoder

It's getting there.. Initial steps for FFmepg: https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=8444 rav1e: https://github.com/xiph/rav1e/pull/3000

I doubt much will be done on such an exotic feature any time soon. Progress has been slow on rav1e, it's missing a lot of features, and only supports tile threading.

rav1e is quite well maintained, the fix for the lint was merged days after the ilog PR merged. But the 0.5.1 release of rav1e was one year ago, in December 2021, while the ilog rename was end of August 2022. There hadn't been a release though of rav1e until end of November 2022, which was also a semver incompatible one. Users had only 2-ish months of time to get to the new rav1e version without experiencing breakage.

The rav1e encoder for AV1 has more assembly in it than Rust, which also doesn't bode well for memory-safe video codec implementations. But this might change once Rust provides portable and memory-safe explicit SIMD.

Obviously not super important, but would be super cool to see AV1 encode/decode support added. There's a great rust library for this too : https://github.com/xiph/rav1e

It's straightforward to compile ffmpeg with libfdk_aac support to be sure quality remains high, especially e.g. build scripts.

After quite a bit of searching around I was unable to find a simple way of getting a build of FFMPEG with all the different AV1 encoders, and building manually would mean I'd have to go get all the libraries that are enabled by default in say, Ubuntu's FFMPEG repo. So I took it into my own hands and modified this build script and added rav1e to the build in my fork here.

I'm currently using this build script so that I can use svt-av1, but I wan't to give rav1e a shot and it's not included. Does anyone know of somewhere I can get ffmpeg compiled with rav1e, or a relatively simple way to do it myself with all the other codecs that build script supports?

These days the situation is much better, but you really want FDK-AAC for best quality (it's proper Fraunhofer code released as Open Source for the Android project, and now widely compatible on all platforms). You can find a standalone front end in the repos, but I prefer to build ffmpeg with support for it for more flexibility. (The ffmpeg built in default aac encoder is still noticeably worse, despite it's improvement a few years ago.)