This command loops through all mp4 files in the current directory, converts them to mkv format, and saves the output files with the same name but with the mkv extension.
Young Sheldon S01E01 (Pilot) often has a longer intro sequence than the rest of the season. If you want to trim the intro to match the shorter standard intro used in episodes 2-22, you can use the -ss (seek) and -t (duration) flags. young sheldon s01 ffmpeg