If you just want to it (keep quality, change container):
ffmpeg -i "abbott.elementary.s01e01.mkv" -c:v libx264 -crf 23 -preset medium -c:a aac -b:a 128k "abbott.elementary.s01e01.mp4" If you just want to (e.g., from 5 to 10 minutes): abbott elementary s01e01 ffmpeg
ffmpeg -i "abbott.elementary.s01e01.mkv" -c copy "abbott.elementary.s01e01.mp4" If you want to it to a smaller H.264 MP4: If you just want to it (keep quality,