Smooth motion, two engines

Films are 24 fps; monitors are 60–240 Hz. FAFI generates the frames in between in real time — what TV makers call motion smoothing, but on your PC, under your control, switchable live while the video plays.

MEMC — fast & light

A Direct3D 11 compute-shader engine (motion estimation & compensation) with scene-cut detection and artifact protection. Runs on any D3D11 GPU.

RIFE — neural quality

The RIFE optical-flow network via ncnn-Vulkan for the cleanest interpolation, switchable with one key (E). Model is a free separate download.

GPU decode, zero-copy

D3D11VA hardware decoding straight into the render pipeline — H.264, HEVC, VP9, AV1 and virtually every other format and container.

A complete player, not a demo

Upscaling — Lanczos-3 with halo-free adaptive sharpening, optional internal 4K render path.
Subtitles — SRT/ASS/SSA/VTT with full libass styling, embedded tracks, auto-fetched platform subtitles, live timing correction — rendered on a sharp layer that is never interpolated.
Picture & sound — image filter presets, a 10-band equalizer, virtual surround, correct 5.1/7.1 mapping, smart loudness.
Streaming as an extra — paste a YouTube/Vimeo URL (resolved locally via yt-dlp) and it plays smooth: download-while-playing, robust against throttling. Local playback needs no network at all.
Export — render the interpolated, filtered result to a file, subtitles as a real track or burned in.
UI — a slim auto-hiding seekbar and a themed right-click menu that holds every control, with an explanation line for every setting.

Private by design

FAFI is built as an offline player for your own files — it works with the network cable pulled. No telemetry, no phone-home, no account. The only network activity is the streaming you explicitly start. Free forever; if it makes your videos smoother, you can support development.

Verify your download

Every release publishes the SHA-256 of FAFI-Setup.exe (see SHA256SUMS.txt):

Get-FileHash .\FAFI-Setup.exe -Algorithm SHA256