To save 50% space while keeping original quality (useful for archiving entire Season 6):
ffmpeg -i "Young.Sheldon.S06E15.mkv" -c:v libx265 -crf 28 -preset fast -c:a copy "Young.Sheldon.S06E15_hevc.mkv"
Note: Expect this to take 10–20 minutes depending on your CPU. young sheldon s06e15 ffmpeg
If your file is an MKV but your TV only likes MP4, use the copy codec to avoid losing quality: To save 50% space while keeping original quality
ffmpeg -i "Young.Sheldon.S06E15.mkv" -c:v copy -c:a copy -c:s copy "Young.Sheldon.S06E15.mp4"
What this does: It rewraps the video, audio, and subtitles into an MP4 container instantly. This takes about 10 seconds for a 1.5GB file. Note: Expect this to take 10–20 minutes depending
You want the dialogue permanently on screen (like a TV broadcast).
ffmpeg -i "Young.Sheldon.S06E15.mkv" -vf "subtitles=Young.Sheldon.S06E15.mkv:si=0" -c:a copy "S06E15_hardsub.mkv"
Flag break down: si=0 selects the first subtitle track.