ffmpeg -i 1996-1.mkv -c:v h264_nvenc -preset fast -c:a aac "01.mp4"

ffmpeg -i "from dusk till dawn 2 1999.mkv" -c:v h264_nvenc -preset fast -c:a aac "02.mp4"

ffmpeg -i "from dusk till dawn 3 1999.mkv" -c:v h264_nvenc -preset fast -c:a aac "03.mp4"