Digital media conversion is often a trade-off between speed and quality. The "015936 min" metric likely refers to a benchmark or a specific timestamp efficiency target. To get "better" results, you need to look at three primary pillars: hardware acceleration, software optimization, and subtitle encoding methods. Hardware Acceleration: The Engine of Speed
ffmpeg -i input.mkv -map 0:v -map 0:a -map 0:s? -c:v libx264 -crf 20 -preset medium -c:a aac -b:a 160k -c:s mov_text convert015936.mp4 jufe570engsub convert015936 min better