ffmpeg -i input.mkv -vf "fps=1/300,scale=320:-1,tile=4x4" -frames 1 preview.jpg Using mkvpropedit :
ffmpeg -i input.mkv -af loudnorm=I=-23:LRA=7:TP=-2 -c:v copy output.mkv Create a contact sheet of every 5 minutes: Heat.1995.1080p.English.Vegamovies.To.mkv
mkvpropedit input.mkv --set "title=Heat (1995) - Director's Cut" --set "comment=Classic crime drama by Michael Mann" Use ffmpeg to cut a famous scene (e.g., Pacino–De Niro coffee shop): ffmpeg -i input
Heat.1995.1080p.English.Vegamovies.To.mkv ffmpeg -i input.mkv -vf "fps=1/300