ffmpeg -i you.s02e05.mkv Even without output, ffmpeg prints stream information: video codec (h264, h265), audio channels, subtitle tracks, duration, bitrate.
ffmpeg -i you.s02e05.mkv -itsoffset 0.5 -i you.s02e05.mkv -map 1:v -map 0:a -c copy you.s02e05_fixed.mkv If you want a good balance of size, quality, and device compatibility: you s02e05 ffmpeg
ffmpeg -i you.s02e05.mkv -vn -c:a copy you.s02e05_audio.aac Check track numbers with ffmpeg -i file.mkv . Suppose video track #0, audio #1, subtitles #2. Remove subtitles: ffmpeg -i you