ffmpeg -i fate.mkv -c:v libx265 -crf 18 -preset veryslow -tune animation nezha_victory.mkv

To slow a 5-second clip down to 20 seconds (20% speed) at 60fps:

When Ne Zha exploded onto screens in 2019, it didn't just break box office records; it redefined the ceiling for Chinese animation. Now, with the release of Ne Zha 2 , the visual spectacle has been cranked to eleven. The film is a kaleidoscope of Taoist magic, fiery combat, and fluid character animation.