FFmpeg

FFmpeg is the de-facto standard toolkit for decoding, encoding, transcoding and streaming audio and video.

**No prebuilt riscv64 FFmpeg exists anywhere.** All three canonical static-build providers ship x86_64 and arm64 only: [BtbN/FFmpeg-Builds](https://github.com/BtbN/FFmpeg-Builds), [John Van Sickle](https://johnvansickle.com/ffmpeg/), and eugeneware/ffmpeg-static.

The distro gap is unusually costly here. Ubuntu 24.04 riscv64 is frozen at FFmpeg 6.1.1 with no `noble-updates` entry, while upstream is on 9.x — and the difference is not just features. RISC-V vector assembly counts:

| Release | `libavcodec/riscv` asm files |

|---|---|