Leonardo is a GUI front end for FFMPEG. It is written in Java for Linux. It can convert MP4/MOV files from sources like mobile phones for use in the free version of Davinci Resolve on the Linux platform. FFMPEG and OpenJava 11 or higher are required. It is hobby software and no warranty or guarantee is made.

To run on Linux, type in terminal where app resides:

java -jar Leo6.jar

Demonstration using Leonardo v.5.1 on Linux Desktop. Current version is 6.0. Video states Java 22 necessary, but this was before I knew Java 22 could not run on some LTS editions. Java 11 is the requirement for the downloadable file.