no AVX512:
encoded 1780 frames in 169.38s (10.51 fps), 2541.97 kb/s, Avg QP:20.40
AVX512:
encoded 1780 frames in 161.94s (10.99 fps), 2541.97 kb/s, Avg QP:20.40
makes a ~5% speed increase
considering avx512 encode was almost 10°C cooler, so maybe i can get away with +100MHz. i like it