Extraxt subtitles from .mp4

To extract subtitles from .mp4 files that have subtitles embeded you can use the command line tool ffmpeg

to install it use:

sudo apt install ffmpeg (on older ubuntu use sudo ap-get install ffmpeg

then use the following syntax from within the right folder :

ffmpeg -i in.mp4 out.srt

The resulting .srt does still have some font commands, but these can easily be removed with Gedit.