Cine Encoder is an application that allow to convert media files while preserving HDR metadata.
I-Videomass
It is a FLOSS, powerful, multitasking and cross-platform graphical user interface (GUI) for FFmpeg and yt-dlp.
I-MystiQ
Kulula ukuyisebenzisa futhi nenhle Multimedia Converter.
I-HandBrake
HandBrake is an open-source video transcoder.
I-Cyan
The ciano is a multimedia converter for all the format you need.