free-fps
Desktop app to change a video FPS
Free FPS is an open‑source desktop app and scripts to change a video file frame rate (FPS) using FFmpeg.
Unlike video editors, it does not add effects or alter content - it only adjusts playback speed and, if needed, re-encodes audio as well.
Useful if you work with multiple videos shot at different frame rates that cannot be combined or edited without interpolation or frame loss. Also doubles as a fast video compressor: keep the original FPS and raise compression (e.g., higher CRF or lower...