FFmpeg developers are known for [1]delivering some really wild performance gains from hand-optimized Assembly code especially around Intel/AMD AVX-512 optimizations for various features of this widely-used open-source multimedia library. Merged this week was enhancing the Bwdif deinterlacing video filter with a 23~28x speed-up over the basic C code path when using AVX-512.

Niklas Haas landed an AVX-512 implementation of the Bob Weaver deinterlacing video filter "vf_bwdif" for benefiting newer Intel and AMD processors with Advanced Vector Extensions 512 capabilities.

Compared to the unoptimized and very basic C baseline, bwdif8_avx512 is 23.28x faster and bwdif10_avx512 is at 28.27x. Or compared to the existing AVX2 implementation, just under twice as fast.

This works for Intel/AMD AVX-512 processors but is gated to prevent usage on Skylake processors that had the more notorious AVX-512 implementation that was subject to thermal/power issues and in turn CPU down-clocking.

The new AVX-512 implementation is [2]merged ahead of [3]FFmpeg 8.0 releasing in a few weeks .



[1] https://www.phoronix.com/news/FFmpeg-July-2025-AVX-512

[2] https://github.com/FFmpeg/FFmpeg/commit/7f00e24d70545dc303e43b62ab5ea5c743411411

[3] https://www.phoronix.com/news/FFmpeg-8.0-Coming-Soon