FFmpeg can do this,but can be long command as mp4 don't support
MKVToolNix is really easy.
Using files that i downloaded before in your arte project.
Drag-drop
.vtt
out of the box,so have to convert to mov_text
and choose right languages also.MKVToolNix is really easy.
Using files that i downloaded before in your arte project.
Drag-drop
.mp4
and .vtt
file into mkvtoolnix,change filename output to .mp4
then click on start multiplexing
done.