Cine Encoder is an application that allow to convert media files while preserving HDR metadata.
Masa wideo
It is a FLOSS, powerful, multitasking and cross-platform graphical user interface (GUI) for FFmpeg and yt-dlp.
MystiQ
Łatwy w obsłudze i elegancki konwerter multimediów.
Hamulec ręczny
HandBrake to transkoder wideo typu open source.
Cyjan
The ciano is a multimedia converter for all the format you need.