Cine Encoder is an application that allow to convert media files while preserving HDR metadata.
Videomass
It is a FLOSS, powerful, multitasking and cross-platform graphical user interface (GUI) for FFmpeg and yt-dlp.
MystiQ
Rahisi kutumia na kifahari cha multimedia cha kifahari.
Handbrake
Handbrake ni transcoder ya video-chanzo wazi.
Ciano
The ciano is a multimedia converter for all the format you need.