It depends on your display. 90 FPS matches many mobile displays (OnePlus, Pixel, iPad Pro 2017-2021). For 120Hz displays, use a 120 FPS player instead.
It will play, but frames will be dropped or the video will be downsampled to 60 FPS, losing the smoothness benefit. 90 fps video player
Save this file as mpv.conf inside %APPDATA%\mpv\ (Windows) or ~/.config/mpv/ (Linux/macOS). Then drag any 90 FPS video into mpv and press Ctrl+H to display stats – you will see exactly output. Need a specific code example for a custom 90 FPS video player using FFmpeg + SDL2? Request Part 2. It depends on your display